DeepSeek V4 Pro vs GPT-6 Sol — Price, Context, and Capability Compared
DeepSeek V4 Pro vs GPT-6 Sol: which should I use?
GPT-6 Sol costs 2.0× more per blended million tokens than DeepSeek V4 Pro. GPT-6 Sol has the larger context window (1,050,000 tokens). Default to DeepSeek V4 Pro unless you specifically need GPT-6 Sol's edge.
Where can you find price, speed, and task evidence for DeepSeek V4 Pro and GPT-6 Sol?
Which tasks fit DeepSeek V4 Pro and GPT-6 Sol?
Best-fit task signals from the published model strengths; this is not a substitute for a controlled benchmark.
| Fact | DeepSeek V4 Pro | GPT-6 Sol |
|---|---|---|
| Best fit | Rigorous math, proofs, and hard algorithmic problems on a budget. | Complex, multi-step professional and coding work where accuracy matters more than cost. |
| Reasoning mode | Available | Available |
What does a Coding Agent workload cost with DeepSeek V4 Pro and GPT-6 Sol?
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 | GPT-6 Sol |
|---|---|---|
| Coding Agent / task | $0.03 (modeled) (winner) | $0.06 (modeled) |
| Input / output rate | $1.32 / $3.96 per M | $2.00 / $10.00 per M |
How fast are DeepSeek V4 Pro and GPT-6 Sol?
Only non-estimated benchmark results are shown as measured.
| Fact | DeepSeek V4 Pro | GPT-6 Sol |
|---|---|---|
| Measured throughput | 68 tokens/s | Unavailable |
| Time to first token | 480 ms | Unavailable |
How compatible are DeepSeek V4 Pro and GPT-6 Sol with APIs?
Provider-level wire-format and SDK facts; model-specific parameter differences may still apply.
| Fact | DeepSeek V4 Pro | GPT-6 Sol |
|---|---|---|
| OpenAI SDK | Usable | Usable |
| Request shape | OpenAI-compatible chat/completions; set model to a deepseek-* id and point base_url at api.deepseek.com. | Canonical /chat/completions and /responses shape — every OpenAI-compatible provider on this site imitates it. |
| Streaming | SSE (OpenAI delta) | SSE (OpenAI delta) |
What are the privacy and retention policies for DeepSeek V4 Pro and GPT-6 Sol?
Provider policy and residency facts from the verified provider registry. A missing retention policy is not treated as a guarantee.
| Fact | DeepSeek V4 Pro | GPT-6 Sol |
|---|---|---|
| Provider says API data trains models | Unavailable | No |
| Published retention period | Unavailable | Unavailable |
| Data residency | Unavailable | US by default; EU data residency available on enterprise agreements |
How much effort does it take to migrate between DeepSeek V4 Pro and GPT-6 Sol?
Direction is from each displayed model to the other. Effort is derived from provider compatibility and published parameter maps.
| Fact | DeepSeek V4 Pro | GPT-6 Sol |
|---|---|---|
| Move DeepSeek V4 Pro → GPT-6 Sol | config; 0 breaking parameter differences | Target: GPT-6 Sol |
| Move GPT-6 Sol → DeepSeek V4 Pro | Source: GPT-6 Sol | 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. |
How do DeepSeek V4 Pro and GPT-6 Sol compare on specs?
| DeepSeek V4 Pro | GPT-6 Sol | |
|---|---|---|
| Price (input) | $1.32/M ✓ | $2.00/M |
| Price (output) | $3.96/M ✓ | $10.00/M |
| Blended price | $1.98/M ✓ | $4.00/M |
| Context window | 1,000,000 tokens | 1,050,000 tokens ✓ |
| Max output | 384,000 tokens ✓ | 128,000 tokens |
| Modalities | text | text, vision |
| Reasoning mode | Yes | Yes |
| Released | 2026-05 | 2026-09 |
| Speed | 68 t/s | Not measured |
How much do DeepSeek V4 Pro and GPT-6 Sol cost at scale?
| Tokens / month | DeepSeek V4 Pro | GPT-6 Sol | Delta |
|---|---|---|---|
| 1,000,000 | $1.98 | $4.00 | $2.02 (2.0×) |
| 10,000,000 | $19.80 | $40.00 | $20.20 (2.0×) |
| 100,000,000 | $198.00 | $400.00 | $202.00 (2.0×) |
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 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.
Run this exact matchup right now
Send the same prompt to DeepSeek V4 Pro and GPT-6 Sol side by side and see the outputs yourself.
Try DeepSeek V4 Pro vs GPT-6 Sol FreeWhat are common questions about DeepSeek V4 Pro and GPT-6 Sol?
Is DeepSeek V4 Pro cheaper than GPT-6 Sol?
DeepSeek V4 Pro is cheaper, at $1.98 per million blended tokens vs $4.00 for GPT-6 Sol.
Which has the bigger context window, DeepSeek V4 Pro or GPT-6 Sol?
GPT-6 Sol has the larger context window: 1,050,000 tokens vs 1,000,000.
Can DeepSeek V4 Pro replace GPT-6 Sol for coding?
Both are viable for coding. Thinking mode with visible chain-of-thought (DeepSeek V4 Pro) vs Strongest OpenAI flagship for agentic, long-horizon coding (GPT-6 Sol) — pick based on which strength matters more for your workload.
Neither of these? See DeepSeek V4 Pro alternatives or GPT-6 Sol alternatives.
What related comparisons help choose between DeepSeek V4 Pro and GPT-6 Sol?
Pricing verified 2026-08-14. Specs verified 2026-08-14.