Claude Opus 4.1 vs GPT-5.6 Sol
Claude Opus 4.1 
GPT-5.6 Sol Verdict
- GPT-5.6 Sol (high) leads on quality: 68.2 vs 58.2.
- Claude Opus 4.1 (thinking) is stronger in human preference, maths, reasoning.
- GPT-5.6 Sol (high) is stronger in agents & tools, coding, composite, instruction following, knowledge, long context, multimodal.
- GPT-5.6 Sol (high) is 3.8× cheaper ($8.00 vs $30.00 per 1M blended).
- GPT-5.6 Sol (high) streams 5.9× faster (59 vs 10 tokens per second).
| Metric | Claude Opus 4.1 (thinking) | GPT-5.6 Sol (high) |
|---|---|---|
| BenchLeader Index | 58.2 | 68.2 |
| Agents & tools score | 63.6 | 87.9 |
| Coding score | 53.3 | 72.4 |
| Composite score | 57.9 | 82.7 |
| Human preference score | 64.6 | – |
| Instruction following score | 52.6 | 67.8 |
| Knowledge score | 58.3 | 73.8 |
| Long context score | 64.5 | 67.4 |
| Maths score | 59.3 | – |
| Multimodal score | 56.5 | 66.4 |
| Reasoning score | 65.6 | 63.3 |
| Blended price $/M | $30.00 | $8.00 |
| Output speed | 10 tok/s | 59 tok/s |
| Time to first answer | 3.2 s | 31.0 s |
| Context window | 200k | 1M |
| SciCode | – | 56.9% |
| WeirdML | – | 88.8% |
| LMArena Text | 1450 | – |
| LMArena Hard Prompts | 1480 | – |
| LMArena Coding | 1512 | – |
| AA Intelligence Index | 22.9 | 42.5 |
| IFBench | 55.4% | 69.2% |
| AA-LCR | 76.0% | 81.7% |
| MMMU-Pro | 67.9% | 81.8% |
| AA-Omniscience | – | 20.4 |
| Terminal-Bench Hard | 34.3% | 62.1% |
| GPQA Diamond (AA) | 80.9% | 92.8% |
| Humanity's Last Exam (AA) | 12.5% | 46.0% |
| SciCode (AA) | – | 57.8% |
| τ²-Bench Telecom (AA) | 71.4% | 83.3% |
| AIME (Vals) | 78.2% | – |
| LiveCodeBench | 66.5% | – |
| MMLU-Pro | 87.9% | – |
| TaxEval | 73.7% | – |
| MedQA | 93.6% | – |
| MGSM | 94.4% | – |
| GPQA Diamond (Vals) | 76.3% | – |
| MultiChallenge | 57.2% | – |
| EnigmaEval | – | 37.1% |
| VISTA | 48.4% | – |
| MultiNRC | 38.4% | – |
| TutorBench | 50.8% | – |
| 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.
Claude Opus 4.1 vs GPT-5.6 Sol: questions
- Is Claude Opus 4.1 better than GPT-5.6 Sol?
- GPT-5.6 Sol (high) leads on quality: 68.2 vs 58.2. 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 Claude Opus 4.1 better than GPT-5.6 Sol for coding?
- GPT-5.6 Sol scores higher in coding (72 vs 53 on the category index, where 50 is average).
- Is Claude Opus 4.1 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, Claude Opus 4.1 or GPT-5.6 Sol?
- GPT-5.6 Sol is cheaper: $8.00 against $30.00 per million tokens, blended at three input tokens per output token.
- Which is faster, Claude Opus 4.1 or GPT-5.6 Sol?
- GPT-5.6 Sol streams faster: 59 against 10 output tokens per second.
- Which has the larger context window?
- GPT-5.6 Sol accepts more context: 1M against 200k tokens.