DeepSeek-V4.1-Flash-1017 vs GPT-5.6 Sol
| Spec | DeepSeek-V4.1-Flash-1017 | GPT-5.6 Sol |
|---|---|---|
| Respan Index | 59.4 (#15) | 61.7 (#13) |
| Blended price per 1M | $0.074 | $4 |
| Context window | 1M | 1.1M |
| Input / output per 1M | $0.035 / $0.192 | $2 / $10 |
| Max output | - | 128K |
| Input | text, image | text, vision |
| Released | 2026-10-17 | 2026-07-09 |
Respan Index by category
Each category is scored 0 to 100, and how far ahead the winner is. Leads under a point are close to even.
| Category | DeepSeek-V4.1-Flash-1017 | GPT-5.6 Sol |
|---|---|---|
| Coding | 47.7 DeepSeek-V4.1-Flash-1017 | 41.3 GPT-5.6 Sol |
| Agents | 76.8 DeepSeek-V4.1-Flash-1017 | 67.9 GPT-5.6 Sol |
| Reasoning | 61.5 DeepSeek-V4.1-Flash-1017 | 76.0 GPT-5.6 Sol |
| Knowledge & language | 42.6 DeepSeek-V4.1-Flash-1017 | 69.5 GPT-5.6 Sol |
| Human preference | 57.6* DeepSeek-V4.1-Flash-1017 | 56.5 GPT-5.6 Sol |
* Estimated: no published scores in that category. How the Respan Index works
Benchmarks both report
GPT-5.6 Sol leads on 8 of the 10 benchmarks both report. Higher is better. Each score links to where it was published.
| Benchmark | DeepSeek-V4.1-Flash-1017 | GPT-5.6 Sol |
|---|---|---|
| APEX-Agents (Mercor) | 69.8% | 51.4% |
| Chess Puzzles (Epoch AI) | 46% | 68% |
| FrontierMath Tier 4 v2 (Epoch AI) | 46.3% | 82.9% |
| FrontierMath Tiers 1-3 v2 (Epoch AI) | 71.2% | 89.1% |
| GPQA Diamond | 93.2% | 94.6% |
| Mystery Game Puzzles (Epoch AI) | 49% | 58% |
| OTIS Mock AIME 2024-2025 (Epoch AI) | 99.4% | 100% |
| SimpleQA Verified | 42.5% | 69.7% |
| Terminal-Bench 4.0 (Vals AI) | 31.8% | 37.9% |
| DeepSWE v1.1 | 77% | 72.7% |
FAQ
Is DeepSeek-V4.1-Flash-1017 better than GPT-5.6 Sol?
GPT-5.6 Sol scores 61.7 on the Respan Index (#13), ahead of DeepSeek-V4.1-Flash-1017 at 59.4 (#15). GPT-5.6 Sol leads on 8 of the 10 benchmarks both report.
Which is cheaper, DeepSeek-V4.1-Flash-1017 or GPT-5.6 Sol?
DeepSeek-V4.1-Flash-1017 lists at $0.035 input and $0.192 output per 1M tokens; GPT-5.6 Sol at $2 and $10. DeepSeek-V4.1-Flash-1017 is 54x cheaper per token at list price.
Which has the larger context window?
DeepSeek-V4.1-Flash-1017 accepts 1M tokens and GPT-5.6 Sol 1.1M tokens.
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