Compare DeepSeek V4 Pro and Grok 4.3: Deep Reasoning vs High-Speed Throughput
DeepSeek V4 Pro vs Grok 4.3: which should I use?
DeepSeek V4 Pro excels at complex mathematical and logical reasoning with built-in thinking mode, while xAI Grok 4.3 offers rapid high-throughput inference with 1M context and real-time live data access. Verified 2026-09-07.
Verified 2026-09-07
Where can you find price, speed, and task evidence for DeepSeek V4 Pro and Grok 4.3?
Which tasks fit DeepSeek V4 Pro and Grok 4.3?
Best-fit task signals from the published model strengths; this is not a substitute for a controlled benchmark.
| Fact | DeepSeek V4 Pro | Grok 4.3 |
|---|---|---|
| Best fit | Rigorous math, proofs, and hard algorithmic problems on a budget. | General-purpose work where speed and a huge context window both matter. |
| Reasoning mode | Available | Available |
What does a Coding Agent workload cost with DeepSeek V4 Pro and Grok 4.3?
Modeled for Coding Agent: 20,000 input + 2,000 output tokens per task, 1 turn. This is a workload model, not a provider quote.
| Fact | DeepSeek V4 Pro | Grok 4.3 |
|---|---|---|
| Coding Agent / task | $0.03 (modeled) | $0.03 (modeled) (winner) |
| Input / output rate | $1.32 / $3.96 per M | $1.25 / $2.50 per M |
How fast are DeepSeek V4 Pro and Grok 4.3?
Only non-estimated benchmark results are shown as measured.
| Fact | DeepSeek V4 Pro | Grok 4.3 |
|---|---|---|
| Measured throughput | 68 tokens/s | 98 tokens/s (winner) |
| Time to first token | 480 ms | 320 ms |
How compatible are DeepSeek V4 Pro and Grok 4.3 with APIs?
Provider-level wire-format and SDK facts; model-specific parameter differences may still apply.
| Fact | DeepSeek V4 Pro | Grok 4.3 |
|---|---|---|
| OpenAI SDK | Usable | Usable |
| Request shape | OpenAI-compatible chat/completions; set model to a deepseek-* id and point base_url at api.deepseek.com. | Full OpenAI chat/completions compatibility — point the openai SDK at api.x.ai and it works unmodified. |
| Streaming | SSE (OpenAI delta) | SSE (OpenAI delta) |
What are the privacy and retention policies for DeepSeek V4 Pro and Grok 4.3?
Provider policy and residency facts from the verified provider registry. A missing retention policy is not treated as a guarantee.
| Fact | DeepSeek V4 Pro | Grok 4.3 |
|---|---|---|
| Provider says API data trains models | Unavailable | Unavailable |
| Published retention period | Unavailable | Unavailable |
| Data residency | Unavailable | Unavailable |
How much effort does it take to migrate between DeepSeek V4 Pro and Grok 4.3?
Direction is from each displayed model to the other. Effort is derived from provider compatibility and published parameter maps.
| Fact | DeepSeek V4 Pro | Grok 4.3 |
|---|---|---|
| Move DeepSeek V4 Pro → Grok 4.3 | config; 0 breaking parameter differences | Target: Grok 4.3 |
| Move Grok 4.3 → DeepSeek V4 Pro | Source: Grok 4.3 | config; 5 breaking parameter differences |
| Why | Keep the `openai` SDK; change `baseURL` and the API key. | Keep the `openai` SDK; change `baseURL` and the API key. |
Exact-pair cross-provider decision guide. Verified 2026-09-02. These three sections are computed from dated scenarios; assumptions and unavailable joins are not observations.
Exact pair boundary: requested models are deepseek-v4-pro and grok-4.3. Provider, pricing, task, and rate-limit pages remain fact owners.
V4/Grok envelope-and-mode admission matrix
Frozen scenario board. Formula / decision rule: admit = input components + output reserve + reasoning/tool/media units fit exact cap; unresolved identity => no cost or winner Boundary: Exact entity pages own standalone limits; this matrix decides only the bilateral workload envelope.
| Frozen scenario | Joined fields and evidence | Output | State |
|---|---|---|---|
| 8K reasoning | pair=deepseek-v4-pro vs grok-4.3; surfaces=DeepSeek [email protected] / xAI [email protected]; requested IDs=deepseek-v4-pro,grok-4.3; effective IDs=deepseek-v4-pro,grok-4.3; host/IDs=api.deepseek.com + xAI API; input=8K; output reserve=declared; reasoning mode=required; accounting=joined | Unavailable — paired cap and reasoning accounting are not joined | UNAVAILABLE — envelope evidence gap |
| 450K retrieval | pair=deepseek-v4-pro vs grok-4.3; surfaces=DeepSeek [email protected] / xAI [email protected]; requested IDs=deepseek-v4-pro,grok-4.3; effective IDs=deepseek-v4-pro,grok-4.3; input=450K; retrieval owner=external RAG; corpus hash=required; output reserve=declared; context cap=exact | Unavailable — retrieval and context admission are not paired | UNAVAILABLE — admission join missing |
| 900K document | pair=deepseek-v4-pro vs grok-4.3; surfaces=DeepSeek [email protected] / xAI [email protected]; requested IDs=deepseek-v4-pro,grok-4.3; effective IDs=deepseek-v4-pro,grok-4.3; input=900K; tokenizer/estimate owner=required; output/tool reserve=declared; exact snapshot=required | Unavailable — usable reserve and exact host ceilings are unjoined | UNAVAILABLE — context reserve missing |
| 120K requested output | pair=deepseek-v4-pro vs grok-4.3; surfaces=DeepSeek [email protected] / xAI [email protected]; requested IDs=deepseek-v4-pro,grok-4.3; effective IDs=deepseek-v4-pro,grok-4.3; requested output=120K; visible/reasoning split=required; stop semantics=required; result hash=missing | Reject silent truncation or continuation inference when the effective output cap is unknown. | REJECTED — output cap unresolved |
| image-plus-text | pair=deepseek-v4-pro vs grok-4.3; surfaces=DeepSeek [email protected] / xAI [email protected]; requested IDs=deepseek-v4-pro,grok-4.3; effective IDs=deepseek-v4-pro,grok-4.3; media=image+text; DeepSeek native modality=text; Grok modality=source join; media units=required; artifact hash=env-005 | Unavailable — native/preprocessed media accounting is not joined | NO SUPPORTED VERDICT — modality gap |
| unresolved gateway-alias fixtures | pair=deepseek-v4-pro vs grok-4.3; surfaces=DeepSeek [email protected] / xAI [email protected]; requested IDs=deepseek-v4-pro,grok-4.3; effective IDs=deepseek-v4-pro,grok-4.3; host=shared gateway; requested=latest; resolved IDs=unknown; reasoning mode=unknown; rate period=unknown | No cost, model, or winner is emitted for an unresolved alias. | BLOCKED — effective identity unknown |
Provenance: deepseek-v4-pro-vs-grok-4-3; first-party source DeepSeek V4 announcement; surface verification date 2026-09-02. Missing joins fail closed.
Retrieval-provenance equivalence receipt
Frozen scenario board. Formula / decision rule: support = claim→source coverage ∧ retrieval trace ∧ corpus/query timestamp ∧ API route identity; consumer-app behavior cannot transfer Boundary: This is a provenance comparison, not a global live-search or research ranking.
| Frozen scenario | Joined fields and evidence | Output | State |
|---|---|---|---|
| no retrieval | pair=deepseek-v4-pro vs grok-4.3; surfaces=DeepSeek [email protected] / xAI [email protected]; requested IDs=deepseek-v4-pro,grok-4.3; effective IDs=deepseek-v4-pro,grok-4.3; retrieval owner=none; corpus/query timestamp=not applicable; source IDs=none; prompt hash=prov-001; exact IDs pinned | A timeless answer may be compared only on the declared no-retrieval rubric. | CONDITIONAL — timeless scope only |
| provider search tool | pair=deepseek-v4-pro vs grok-4.3; surfaces=DeepSeek [email protected] / xAI [email protected]; requested IDs=deepseek-v4-pro,grok-4.3; effective IDs=deepseek-v4-pro,grok-4.3; retrieval owner=provider; tool-call trace=required; source IDs=required; query timestamp=required; host=exact | Unavailable — both providers lack a joined tool trace and source-ID export | UNAVAILABLE — provider trace missing |
| external RAG | pair=deepseek-v4-pro vs grok-4.3; surfaces=DeepSeek [email protected] / xAI [email protected]; requested IDs=deepseek-v4-pro,grok-4.3; effective IDs=deepseek-v4-pro,grok-4.3; retrieval owner=application; corpus hash=rag-003; query timestamp=required; context artifact hash=required; answer hash=missing | Unavailable — paired corpus, prompt, and answer support are absent | UNAVAILABLE — RAG join missing |
| dated news query | pair=deepseek-v4-pro vs grok-4.3; surfaces=DeepSeek [email protected] / xAI [email protected]; requested IDs=deepseek-v4-pro,grok-4.3; effective IDs=deepseek-v4-pro,grok-4.3; query timestamp=required; source publication dates=required; freshness SLA=declared; tool trace=required | Unavailable — freshness and claim-support coverage are not observed for both APIs | UNAVAILABLE — dated provenance gap |
| citation-required answer | pair=deepseek-v4-pro vs grok-4.3; surfaces=DeepSeek [email protected] / xAI [email protected]; requested IDs=deepseek-v4-pro,grok-4.3; effective IDs=deepseek-v4-pro,grok-4.3; citation rubric=required; cited source IDs=required; claim-to-source map=required; result hash=prov-005 | Reject any unsupported claim; no pair pass/fail without the same rubric and denominator. | CONDITIONAL — citation check required |
| missing-source-metadata fixtures | pair=deepseek-v4-pro vs grok-4.3; surfaces=DeepSeek [email protected] / xAI [email protected]; requested IDs=deepseek-v4-pro,grok-4.3; effective IDs=deepseek-v4-pro,grok-4.3; answer present; source IDs/timestamps=missing; consumer-app search claim=present; API route=exact | Consumer-product live-data behavior is not evidence for an undocumented API route. | FAIL CLOSED — source metadata missing |
Provenance: deepseek-v4-pro-vs-grok-4-3; first-party source xAI API documentation; surface verification date 2026-09-02. Missing joins fail closed.
Symmetric failover and side-effect ledger
Frozen scenario board. Formula / decision rule: replay = failure classified ∧ state replayable ∧ schema/result validated ∧ idempotency policy satisfied; unsafe replay is blocked Boundary: Cross-provider failover requires exact IDs and side-effect settlement; a second response is not automatically a safe retry.
| Frozen scenario | Joined fields and evidence | Output | State |
|---|---|---|---|
| read-only chat | pair=deepseek-v4-pro vs grok-4.3; surfaces=DeepSeek [email protected] / xAI [email protected]; requested IDs=deepseek-v4-pro,grok-4.3; effective IDs=deepseek-v4-pro,grok-4.3; primary/fallback IDs=exact; failure=transient; replayable state=full; idempotency=not required; attempt_cap=2 | A read-only fallback can be tested after exact identity and result validation join. | CONDITIONAL — replay probe required |
| search | pair=deepseek-v4-pro vs grok-4.3; surfaces=DeepSeek [email protected] / xAI [email protected]; requested IDs=deepseek-v4-pro,grok-4.3; effective IDs=deepseek-v4-pro,grok-4.3; primary/fallback hosts=exact; retrieval trace=required; query hash=required; source IDs=required; attempt_cap=2 | Unavailable — search provenance cannot be replayed symmetrically | UNAVAILABLE — provenance replay missing |
| strict extraction | pair=deepseek-v4-pro vs grok-4.3; surfaces=DeepSeek [email protected] / xAI [email protected]; requested IDs=deepseek-v4-pro,grok-4.3; effective IDs=deepseek-v4-pro,grok-4.3; schema hash=failover-003; partial result=validated; parser version=required; idempotency key=required | Unavailable — partial-result and parser compatibility are not joined | UNAVAILABLE — schema validation missing |
| idempotent write | pair=deepseek-v4-pro vs grok-4.3; surfaces=DeepSeek [email protected] / xAI [email protected]; requested IDs=deepseek-v4-pro,grok-4.3; effective IDs=deepseek-v4-pro,grok-4.3; write key=idem-004; state checkpoint=required; primary/fallback exact IDs; result validation=required | Retry only with the same idempotency key after state validation; cap attempts at two. | CONDITIONAL — idempotency proof required |
| non-idempotent write | pair=deepseek-v4-pro vs grok-4.3; surfaces=DeepSeek [email protected] / xAI [email protected]; requested IDs=deepseek-v4-pro,grok-4.3; effective IDs=deepseek-v4-pro,grok-4.3; side_effect=non-idempotent; rollback artifact=required; replay state=unsafe; human owner=required | Do not cross-provider replay; stop and require human review. | BLOCKED — unsafe replay |
| partial streamed tool-call | pair=deepseek-v4-pro vs grok-4.3; surfaces=DeepSeek [email protected] / xAI [email protected]; requested IDs=deepseek-v4-pro,grok-4.3; effective IDs=deepseek-v4-pro,grok-4.3; event sequence hash=failover-006; completed tool IDs=required; uncommitted effects=required; fallback=exact | Unavailable — event settlement and uncommitted-effect state are absent | BLOCKED — partial effect unknown |
Provenance: deepseek-v4-pro-vs-grok-4-3; first-party source DeepSeek API documentation; surface verification date 2026-09-02. Missing joins fail closed.
Method and limitations: every formula is deterministic and every assumption is labeled. Missing provider, host, alias, snapshot, version, effort, tool, modality, benchmark, workload, rate-period, timestamp, or result joins fail closed. Run this scenario →
Exact-pair decision guide · verified 2026-09-07
Exact pair boundary: DeepSeek / xAI; model endpoint, 1M context parity, open-weights thinking mode vs proprietary high-speed inference must join. Requested models are deepseek-v4-pro and grok-4.3. Provider, rate, pricing, and task pages remain fact owners.
Token pricing and off-peak schedule economic model
Frozen scenario board. Formula / deterministic rule: monthly_spend = peak_calls * rate_peak + off_peak_calls * rate_off_peak Boundary: Owns pricing differentials and off-peak discount modeling.
| Frozen scenario | Pair, identity, host, surface, and evidence fields | Result | State |
|---|---|---|---|
| peak business hours query load (UTC 00:30-16:30) | pair=deepseek-v4-pro vs grok-4.3; provider=DeepSeek / xAI; hostA=api.deepseek.com; hostB=api.x.ai; surfaceA=DeepSeek API; surfaceB=xAI API; requested/effective IDs=deepseek-v4-pro,grok-4.3; scenario=peak business hours query load (UTC 00:30-16:30); workload timing; DeepSeek spend; Grok 4.3 spend; cost difference; off-peak savings; financial winner; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — peak business hours query load (UTC 00:30-16:30) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| off-peak discounted batch load (UTC 16:30-00:30) | pair=deepseek-v4-pro vs grok-4.3; provider=DeepSeek / xAI; hostA=api.deepseek.com; hostB=api.x.ai; surfaceA=DeepSeek API; surfaceB=xAI API; requested/effective IDs=deepseek-v4-pro,grok-4.3; scenario=off-peak discounted batch load (UTC 16:30-00:30); workload timing; DeepSeek spend; Grok 4.3 spend; cost difference; off-peak savings; financial winner; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — off-peak discounted batch load (UTC 16:30-00:30) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| 50% cache hit warm workload | pair=deepseek-v4-pro vs grok-4.3; provider=DeepSeek / xAI; hostA=api.deepseek.com; hostB=api.x.ai; surfaceA=DeepSeek API; surfaceB=xAI API; requested/effective IDs=deepseek-v4-pro,grok-4.3; scenario=50% cache hit warm workload; workload timing; DeepSeek spend; Grok 4.3 spend; cost difference; off-peak savings; financial winner; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 50% cache hit warm workload is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| 1M context high-density document query | pair=deepseek-v4-pro vs grok-4.3; provider=DeepSeek / xAI; hostA=api.deepseek.com; hostB=api.x.ai; surfaceA=DeepSeek API; surfaceB=xAI API; requested/effective IDs=deepseek-v4-pro,grok-4.3; scenario=1M context high-density document query; workload timing; DeepSeek spend; Grok 4.3 spend; cost difference; off-peak savings; financial winner; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 1M context high-density document query is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| rate limit quota saturation | pair=deepseek-v4-pro vs grok-4.3; provider=DeepSeek / xAI; hostA=api.deepseek.com; hostB=api.x.ai; surfaceA=DeepSeek API; surfaceB=xAI API; requested/effective IDs=deepseek-v4-pro,grok-4.3; scenario=rate limit quota saturation; workload timing; DeepSeek spend; Grok 4.3 spend; cost difference; off-peak savings; financial winner; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — rate limit quota saturation is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| unresolved billing currency conversion | pair=deepseek-v4-pro vs grok-4.3; provider=DeepSeek / xAI; hostA=api.deepseek.com; hostB=api.x.ai; surfaceA=DeepSeek API; surfaceB=xAI API; requested/effective IDs=deepseek-v4-pro,grok-4.3; scenario=unresolved billing currency conversion; workload timing; DeepSeek spend; Grok 4.3 spend; cost difference; off-peak savings; financial winner; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — unresolved billing currency conversion has no matched, dated bilateral observation. | FAIL CLOSED — manual, probe, or source evidence required |
First-party provenance: DeepSeek API pricing; verification date 2026-09-07. Missing or conflicting joins fail closed.
Sequential execution latency and throughput comparison
Frozen scenario board. Formula / deterministic rule: turnaround_time = ttft + (output_tokens / tps); Grok high throughput vs DeepSeek deep thinking Boundary: Owns turnaround time and throughput modeling for interactive workflows.
| Frozen scenario | Pair, identity, host, surface, and evidence fields | Result | State |
|---|---|---|---|
| interactive short question (500 tokens) | pair=deepseek-v4-pro vs grok-4.3; provider=DeepSeek / xAI; hostA=api.deepseek.com; hostB=api.x.ai; surfaceA=DeepSeek API; surfaceB=xAI API; requested/effective IDs=deepseek-v4-pro,grok-4.3; scenario=interactive short question (500 tokens); output tokens; DeepSeek elapsed time; Grok 4.3 elapsed time; latency ratio; UX responsiveness verdict; throughput champion; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — interactive short question (500 tokens) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| deep analytical response (4K tokens) | pair=deepseek-v4-pro vs grok-4.3; provider=DeepSeek / xAI; hostA=api.deepseek.com; hostB=api.x.ai; surfaceA=DeepSeek API; surfaceB=xAI API; requested/effective IDs=deepseek-v4-pro,grok-4.3; scenario=deep analytical response (4K tokens); output tokens; DeepSeek elapsed time; Grok 4.3 elapsed time; latency ratio; UX responsiveness verdict; throughput champion; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — deep analytical response (4K tokens) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| extended code generation (16K tokens) | pair=deepseek-v4-pro vs grok-4.3; provider=DeepSeek / xAI; hostA=api.deepseek.com; hostB=api.x.ai; surfaceA=DeepSeek API; surfaceB=xAI API; requested/effective IDs=deepseek-v4-pro,grok-4.3; scenario=extended code generation (16K tokens); output tokens; DeepSeek elapsed time; Grok 4.3 elapsed time; latency ratio; UX responsiveness verdict; throughput champion; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — extended code generation (16K tokens) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| batch classification sequence (50 calls) | pair=deepseek-v4-pro vs grok-4.3; provider=DeepSeek / xAI; hostA=api.deepseek.com; hostB=api.x.ai; surfaceA=DeepSeek API; surfaceB=xAI API; requested/effective IDs=deepseek-v4-pro,grok-4.3; scenario=batch classification sequence (50 calls); output tokens; DeepSeek elapsed time; Grok 4.3 elapsed time; latency ratio; UX responsiveness verdict; throughput champion; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — batch classification sequence (50 calls) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| concurrency contention latency spike | pair=deepseek-v4-pro vs grok-4.3; provider=DeepSeek / xAI; hostA=api.deepseek.com; hostB=api.x.ai; surfaceA=DeepSeek API; surfaceB=xAI API; requested/effective IDs=deepseek-v4-pro,grok-4.3; scenario=concurrency contention latency spike; output tokens; DeepSeek elapsed time; Grok 4.3 elapsed time; latency ratio; UX responsiveness verdict; throughput champion; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — concurrency contention latency spike is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| unmeasured speed fixture | pair=deepseek-v4-pro vs grok-4.3; provider=DeepSeek / xAI; hostA=api.deepseek.com; hostB=api.x.ai; surfaceA=DeepSeek API; surfaceB=xAI API; requested/effective IDs=deepseek-v4-pro,grok-4.3; scenario=unmeasured speed fixture; output tokens; DeepSeek elapsed time; Grok 4.3 elapsed time; latency ratio; UX responsiveness verdict; throughput champion; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — unmeasured speed fixture is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
First-party provenance: All AI Ask measured speed dataset; verification date 2026-09-07. Missing or conflicting joins fail closed.
Logical reasoning accuracy versus latency trade-off
Frozen scenario board. Formula / deterministic rule: roi = reasoning_accuracy_delta - (latency_penalty_cost + compute_spend) Boundary: Owns accuracy-versus-latency trade-offs for analytical pipelines.
| Frozen scenario | Pair, identity, host, surface, and evidence fields | Result | State |
|---|---|---|---|
| simple factual lookup (Grok optimal) | pair=deepseek-v4-pro vs grok-4.3; provider=DeepSeek / xAI; hostA=api.deepseek.com; hostB=api.x.ai; surfaceA=DeepSeek API; surfaceB=xAI API; requested/effective IDs=deepseek-v4-pro,grok-4.3; scenario=simple factual lookup (Grok optimal); domain task; DeepSeek accuracy; Grok accuracy; latency difference; accuracy gain; routing recommendation; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — simple factual lookup (Grok optimal) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| routine text extraction (Grok optimal) | pair=deepseek-v4-pro vs grok-4.3; provider=DeepSeek / xAI; hostA=api.deepseek.com; hostB=api.x.ai; surfaceA=DeepSeek API; surfaceB=xAI API; requested/effective IDs=deepseek-v4-pro,grok-4.3; scenario=routine text extraction (Grok optimal); domain task; DeepSeek accuracy; Grok accuracy; latency difference; accuracy gain; routing recommendation; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — routine text extraction (Grok optimal) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| multi-variable math optimization (DeepSeek optimal) | pair=deepseek-v4-pro vs grok-4.3; provider=DeepSeek / xAI; hostA=api.deepseek.com; hostB=api.x.ai; surfaceA=DeepSeek API; surfaceB=xAI API; requested/effective IDs=deepseek-v4-pro,grok-4.3; scenario=multi-variable math optimization (DeepSeek optimal); domain task; DeepSeek accuracy; Grok accuracy; latency difference; accuracy gain; routing recommendation; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — multi-variable math optimization (DeepSeek optimal) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| formal algorithm correctness verification (DeepSeek optimal) | pair=deepseek-v4-pro vs grok-4.3; provider=DeepSeek / xAI; hostA=api.deepseek.com; hostB=api.x.ai; surfaceA=DeepSeek API; surfaceB=xAI API; requested/effective IDs=deepseek-v4-pro,grok-4.3; scenario=formal algorithm correctness verification (DeepSeek optimal); domain task; DeepSeek accuracy; Grok accuracy; latency difference; accuracy gain; routing recommendation; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — formal algorithm correctness verification (DeepSeek optimal) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| hybrid routing architecture (70% Grok / 30% DeepSeek) | pair=deepseek-v4-pro vs grok-4.3; provider=DeepSeek / xAI; hostA=api.deepseek.com; hostB=api.x.ai; surfaceA=DeepSeek API; surfaceB=xAI API; requested/effective IDs=deepseek-v4-pro,grok-4.3; scenario=hybrid routing architecture (70% Grok / 30% DeepSeek); domain task; DeepSeek accuracy; Grok accuracy; latency difference; accuracy gain; routing recommendation; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — hybrid routing architecture (70% Grok / 30% DeepSeek) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| untested reasoning accuracy delta | pair=deepseek-v4-pro vs grok-4.3; provider=DeepSeek / xAI; hostA=api.deepseek.com; hostB=api.x.ai; surfaceA=DeepSeek API; surfaceB=xAI API; requested/effective IDs=deepseek-v4-pro,grok-4.3; scenario=untested reasoning accuracy delta; domain task; DeepSeek accuracy; Grok accuracy; latency difference; accuracy gain; routing recommendation; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — untested reasoning accuracy delta is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
First-party provenance: DeepSeek API documentation; verification date 2026-09-07. Missing or conflicting joins fail closed.
Method and limitations: formulas are deterministic; observed and assumed inputs are labeled; no missing provider, host, account, region, realm, alias, snapshot, revision, weight, artifact, control, tool, modality, workload, rate-period, timestamp, or result is transferred. Run this scenario →
How do DeepSeek V4 Pro and Grok 4.3 compare on specs?
| DeepSeek V4 Pro | Grok 4.3 | |
|---|---|---|
| Price (input) | $1.32/M | $1.25/M ✓ |
| Price (output) | $3.96/M | $2.50/M ✓ |
| Blended price | $1.98/M | $1.56/M ✓ |
| Context window | 1,000,000 tokens | 1,000,000 tokens |
| Max output | 384,000 tokens ✓ | 64,000 tokens |
| Modalities | text | text, vision |
| Reasoning mode | Yes | Yes |
| Released | 2026-05 | 2026-06 |
| Speed | 68 t/s | 98 t/s ✓ |
How much do DeepSeek V4 Pro and Grok 4.3 cost at scale?
| Tokens / month | DeepSeek V4 Pro | Grok 4.3 | Delta |
|---|---|---|---|
| 1,000,000 | $1.98 | $1.56 | $0.42 (1.3×) |
| 10,000,000 | $19.80 | $15.63 | $4.18 (1.3×) |
| 100,000,000 | $198.00 | $156.25 | $41.75 (1.3×) |
Choose DeepSeek V4 Pro if…
- ✓Thinking mode with visible chain-of-thought
- ✓Frontier-level math and competition coding
- ✓Still far cheaper than closed frontier models
- ✓Rigorous math, proofs, and hard algorithmic problems on a budget.
Choose Grok 4.3 if…
- ✓xAI’s general-purpose flagship
- ✓Extremely fast for its size
- ✓1M-token context
- ✓General-purpose work where speed and a huge context window both matter.
Run this exact matchup right now
Send the same prompt to DeepSeek V4 Pro and Grok 4.3 side by side and see the outputs yourself.
Try DeepSeek V4 Pro vs Grok 4.3 FreeWhat are common questions about DeepSeek V4 Pro and Grok 4.3?
Is DeepSeek V4 Pro cheaper than Grok 4.3?
Grok 4.3 is cheaper, at $1.56 per million blended tokens vs $1.98 for DeepSeek V4 Pro.
Which has the bigger context window, DeepSeek V4 Pro or Grok 4.3?
Both models support 1,000,000 tokens of context.
Can DeepSeek V4 Pro replace Grok 4.3 for coding?
Both are viable for coding. Thinking mode with visible chain-of-thought (DeepSeek V4 Pro) vs xAI’s general-purpose flagship (Grok 4.3) — pick based on which strength matters more for your workload.
Which is faster, DeepSeek V4 Pro or Grok 4.3?
Grok 4.3 is faster: 98 t/s vs 68 t/s, measured on our speed benchmarks.
Neither of these? See DeepSeek V4 Pro alternatives or Grok 4.3 alternatives.
What related comparisons help choose between DeepSeek V4 Pro and Grok 4.3?
DeepSeek V4 Pro pricingGrok 4.3 pricingvs Claude Opus 4.8vs Claude Opus 5.5vs Claude Sonnet 5vs Gemini 3.1 ProPremium model tests
Pricing verified 2026-05-19. Specs verified 2026-08-14.