GPT-6 Sol vs Grok 4.3 — Price, Context, and Capability Compared
GPT-6 Sol vs Grok 4.3: which should I use?
GPT-6 Sol costs 2.6× more per blended million tokens than Grok 4.3. GPT-6 Sol has the larger context window (1,050,000 tokens). Default to Grok 4.3 unless you specifically need GPT-6 Sol's edge.
Where can you find price, speed, and task evidence for GPT-6 Sol and Grok 4.3?
Which tasks fit GPT-6 Sol and Grok 4.3?
Best-fit task signals from the published model strengths; this is not a substitute for a controlled benchmark.
| Fact | GPT-6 Sol | Grok 4.3 |
|---|---|---|
| Best fit | Complex, multi-step professional and coding work where accuracy matters more than cost. | General-purpose work where speed and a huge context window both matter. |
| Reasoning mode | Available | Available |
What does a Coding Agent workload cost with GPT-6 Sol 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 | GPT-6 Sol | Grok 4.3 |
|---|---|---|
| Coding Agent / task | $0.06 (modeled) | $0.03 (modeled) (winner) |
| Input / output rate | $2.00 / $10.00 per M | $1.25 / $2.50 per M |
How fast are GPT-6 Sol and Grok 4.3?
Only non-estimated benchmark results are shown as measured.
| Fact | GPT-6 Sol | Grok 4.3 |
|---|---|---|
| Measured throughput | Unavailable | 98 tokens/s |
| Time to first token | Unavailable | 320 ms |
How compatible are GPT-6 Sol and Grok 4.3 with APIs?
Provider-level wire-format and SDK facts; model-specific parameter differences may still apply.
| Fact | GPT-6 Sol | Grok 4.3 |
|---|---|---|
| OpenAI SDK | Usable | Usable |
| Request shape | Canonical /chat/completions and /responses shape — every OpenAI-compatible provider on this site imitates it. | 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 GPT-6 Sol 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 | GPT-6 Sol | Grok 4.3 |
|---|---|---|
| Provider says API data trains models | No | Unavailable |
| Published retention period | Unavailable | Unavailable |
| Data residency | US by default; EU data residency available on enterprise agreements | Unavailable |
How much effort does it take to migrate between GPT-6 Sol and Grok 4.3?
Direction is from each displayed model to the other. Effort is derived from provider compatibility and published parameter maps.
| Fact | GPT-6 Sol | Grok 4.3 |
|---|---|---|
| Move GPT-6 Sol → Grok 4.3 | config; 0 breaking parameter differences | Target: Grok 4.3 |
| Move Grok 4.3 → GPT-6 Sol | Source: Grok 4.3 | config; 0 breaking parameter differences |
| Why | Keep the `openai` SDK; change `baseURL` and the API key. | Keep the `openai` SDK; change `baseURL` and the API key. |
How do GPT-6 Sol and Grok 4.3 compare on specs?
| GPT-6 Sol | Grok 4.3 | |
|---|---|---|
| Price (input) | $2.00/M | $1.25/M ✓ |
| Price (output) | $10.00/M | $2.50/M ✓ |
| Blended price | $4.00/M | $1.56/M ✓ |
| Context window | 1,050,000 tokens ✓ | 1,000,000 tokens |
| Max output | 128,000 tokens ✓ | 64,000 tokens |
| Modalities | text, vision | text, vision |
| Reasoning mode | Yes | Yes |
| Released | 2026-09 | 2026-06 |
| Speed | Not measured | 98 t/s |
How much do GPT-6 Sol and Grok 4.3 cost at scale?
| Tokens / month | GPT-6 Sol | Grok 4.3 | Delta |
|---|---|---|---|
| 1,000,000 | $4.00 | $1.56 | $2.44 (2.6×) |
| 10,000,000 | $40.00 | $15.63 | $24.38 (2.6×) |
| 100,000,000 | $400.00 | $156.25 | $243.75 (2.6×) |
Choose GPT-6 Sol if…
- ✓Strongest OpenAI flagship for agentic, long-horizon coding
- ✓Deep reasoning mode for multi-step planning
- ✓Native vision input and 1M+ context
- ✓Complex, multi-step professional and coding work where accuracy matters more than cost.
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 GPT-6 Sol and Grok 4.3 side by side and see the outputs yourself.
Try GPT-6 Sol vs Grok 4.3 FreeWhat are common questions about GPT-6 Sol and Grok 4.3?
Is GPT-6 Sol cheaper than Grok 4.3?
Grok 4.3 is cheaper, at $1.56 per million blended tokens vs $4.00 for GPT-6 Sol.
Which has the bigger context window, GPT-6 Sol or Grok 4.3?
GPT-6 Sol has the larger context window: 1,050,000 tokens vs 1,000,000.
Can GPT-6 Sol replace Grok 4.3 for coding?
Both are viable for coding. Strongest OpenAI flagship for agentic, long-horizon coding (GPT-6 Sol) vs xAI’s general-purpose flagship (Grok 4.3) — pick based on which strength matters more for your workload.
Neither of these? See GPT-6 Sol alternatives or Grok 4.3 alternatives.
What related comparisons help choose between GPT-6 Sol and Grok 4.3?
Pricing verified 2026-05-19. Specs verified 2026-08-14.