DeepSeek V4 Pro vs GPT-5.6 Sol
DeepSeek V4 Pro 
GPT-5.6 Sol Verdict
- GPT-5.6 Sol (high) leads on quality: 68.2 vs 59.5.
- DeepSeek V4 Pro (high) is stronger in instruction following.
- GPT-5.6 Sol (high) is stronger in agents & tools, composite, knowledge, long context, coding, multimodal, reasoning.
- DeepSeek V4 Pro (high) is 15× cheaper ($0.548 vs $8.00 per 1M blended).
| Metric | DeepSeek V4 Pro (high) | GPT-5.6 Sol (high) |
|---|---|---|
| BenchLeader Index | 59.5 | 68.2 |
| Agents & tools score | 63.8 | 87.9 |
| Composite score | 67.1 | 82.7 |
| Instruction following score | 69.6 | 67.8 |
| Knowledge score | 59.1 | 73.8 |
| Long context score | 61.6 | 67.4 |
| Coding score | – | 72.4 |
| Multimodal score | – | 66.4 |
| Reasoning score | – | 63.3 |
| Blended price $/M | $0.548 | $8.00 |
| Output speed | 65 tok/s | 59 tok/s |
| Time to first answer | 32.3 s | 31.0 s |
| Context window | 1M | 1M |
| SciCode | – | 56.9% |
| WeirdML | – | 88.8% |
| LMArena Agent | 4.4 | – |
| AA Intelligence Index | 30.1 | 42.5 |
| IFBench | 71.3% | 69.2% |
| AA-LCR | 70.3% | 81.7% |
| MMMU-Pro | – | 81.8% |
| AA-Omniscience | -10.6 | 20.4 |
| Terminal-Bench Hard | 41.7% | 62.1% |
| GPQA Diamond (AA) | 90.5% | 92.8% |
| Humanity's Last Exam (AA) | 35.2% | 46.0% |
| SciCode (AA) | – | 57.8% |
| τ²-Bench Telecom (AA) | 94.2% | 83.3% |
| EnigmaEval | – | 37.1% |
| ARC-AGI-1 | – | 97.0% |
| ARC-AGI-2 | – | 85.4% |
| ARC-AGI-3 | – | 2.2% |
Data as of 2026-09-10. Best configuration of each model; every score links to its source on the model pages.
DeepSeek V4 Pro vs GPT-5.6 Sol: questions
- Is DeepSeek V4 Pro better than GPT-5.6 Sol?
- GPT-5.6 Sol (high) leads on quality: 68.2 vs 59.5. The BenchLeader Index combines every independent quality benchmark; GPT-5.6 Sol (high) is ahead overall as of 2026-09-10, but check the category scores for your use.
- Is DeepSeek V4 Pro better than GPT-5.6 Sol for agentic tasks?
- GPT-5.6 Sol scores higher in agentic tasks (88 vs 64 on the category index, where 50 is average).
- Which is cheaper, DeepSeek V4 Pro or GPT-5.6 Sol?
- DeepSeek V4 Pro is cheaper: $0.548 against $8.00 per million tokens, blended at three input tokens per output token.
- Which is faster, DeepSeek V4 Pro or GPT-5.6 Sol?
- DeepSeek V4 Pro streams faster: 65 against 59 output tokens per second.
- Which has the larger context window?
- Both accept 1M tokens of context.