DeepSeek-V3.1 vs GPT-5.1 Thinking: Specs & Benchmark Comparison
| Characteristic | DeepSeek-V3.1 | GPT-5.1 Thinking |
|---|---|---|
| Company | DeepSeek | OpenAI |
| Release Date | January 9, 2025 | November 11, 2025 |
| Parameters | 671B | — |
| Multimodal | No | Yes |
| Context (input) | 164K | 256K |
| Context (output) | 164K | 128K |
| Input Price / 1M | $0.27 | $3.00 |
| Output Price / 1M | $1.00 | $12.00 |
| Average Score | 0.8 | 0.9 |
| Benchmarks | ||
| GPQA | 0.8 | 0.9 |
Visual Benchmark Comparison
DeepSeek-V3.1
GPT-5.1 Thinking
GPQA0.8 vs 0.9
0.8
0.9
Verdict
GPT-5.1 Thinking leads in 2 out of 4 comparison categories.
Overall Performance
Both models show comparable average scores: DeepSeek-V3.1 — 0.8, GPT-5.1 Thinking — 0.9.
API Cost
DeepSeek-V3.1 is 11.8x cheaper: input $0.27/1M vs $3.00/1M tokens.
Context Window
GPT-5.1 Thinking supports a larger context: 256K vs 164K tokens.
Recency
GPT-5.1 Thinking is newer: released 11/11/2025 vs 1/9/2025.
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Frequently Asked Questions
Which is better for coding — DeepSeek-V3.1 or GPT-5.1 Thinking?
Direct comparison on the SWE-Bench benchmark is not available. We recommend reviewing other metrics on the comparison page.
Which model is cheaper — DeepSeek-V3.1 or GPT-5.1 Thinking?
DeepSeek-V3.1 is cheaper for input: $0.27 per 1M tokens vs $3.00.
Which has a larger context window — DeepSeek-V3.1 or GPT-5.1 Thinking?
GPT-5.1 Thinking supports a larger context: 256,000 tokens vs 163,840.
The DeepSeek-V3.1 and GPT-5.1 Thinking comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the DeepSeek-V3.1 or GPT-5.1 Thinking page. See also the complete list of AI model comparisons.