GPT-5.6 Sol vs GPT-5 Pro
GPT-5.6 Sol Verdict
- GPT-5.6 Sol (high) leads on quality: 68.2 vs 60.8.
- GPT-5.6 Sol (high) is stronger in agents & tools, coding, composite, instruction following, knowledge, long context, reasoning.
- GPT-5 Pro is stronger in multimodal.
- GPT-5.6 Sol (high) is 5.2× cheaper ($8.00 vs $41.25 per 1M blended).
| Metric | GPT-5.6 Sol (high) | GPT-5 Pro |
|---|---|---|
| BenchLeader Index | 68.2 | 60.8 |
| Agents & tools score | 87.9 | – |
| Coding score | 72.4 | – |
| Composite score | 82.7 | – |
| Instruction following score | 67.8 | – |
| Knowledge score | 73.8 | 68.0 |
| Long context score | 67.4 | – |
| Multimodal score | 66.4 | 67.4 |
| Reasoning score | 63.3 | 57.6 |
| Blended price $/M | $8.00 | $41.25 |
| Output speed | 59 tok/s | – |
| Time to first answer | 31.0 s | – |
| Context window | 1M | 400k |
| Humanity's Last Exam | – | 31.6% |
| SimpleBench | – | 61.6% |
| SciCode | 56.9% | – |
| WeirdML | 88.8% | – |
| Epoch Capabilities Index | – | 150.3 |
| AA Intelligence Index | 42.5 | – |
| IFBench | 69.2% | – |
| AA-LCR | 81.7% | – |
| MMMU-Pro | 81.8% | – |
| AA-Omniscience | 20.4 | – |
| Terminal-Bench Hard | 62.1% | – |
| GPQA Diamond (AA) | 92.8% | – |
| Humanity's Last Exam (AA) | 46.0% | – |
| SciCode (AA) | 57.8% | – |
| τ²-Bench Telecom (AA) | 83.3% | – |
| PRBench Finance | – | 51.1% |
| PRBench Legal | – | 49.9% |
| EnigmaEval | 37.1% | – |
| VISTA | – | 52.4% |
| MultiNRC | – | 65.2% |
| Kagi LLM Benchmark | – | 76.8% |
| ARC-AGI-1 | 97.0% | 70.2% |
| ARC-AGI-2 | 85.4% | 18.3% |
| 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.
GPT-5.6 Sol vs GPT-5 Pro: questions
- Is GPT-5.6 Sol better than GPT-5 Pro?
- GPT-5.6 Sol (high) leads on quality: 68.2 vs 60.8. 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.
- Which is cheaper, GPT-5.6 Sol or GPT-5 Pro?
- GPT-5.6 Sol is cheaper: $8.00 against $41.25 per million tokens, blended at three input tokens per output token.
- Which has the larger context window?
- GPT-5.6 Sol accepts more context: 1M against 400k tokens.