Claude Sonnet 5 vs GPT-6 Sol
Claude Sonnet 5 
GPT-6 Sol Verdict
- GPT-6 Sol (max) leads on quality: 67.7 vs 61.6.
- Claude Sonnet 5 (high) is stronger in agents & tools, coding, human preference, maths.
- GPT-6 Sol (max) is stronger in composite, knowledge, long context, multimodal, reasoning.
- They cost about the same ($4.00 per 1M blended).
- GPT-6 Sol (max) streams 1.9× faster (126 vs 68 tokens per second).
| Metric | Claude Sonnet 5 (high) | GPT-6 Sol (max) |
|---|---|---|
| BenchLeader Index | 61.6 | 67.7 |
| Agents & tools score | 62.0 | – |
| Coding score | 61.2 | – |
| Composite score | 67.2 | 86.2 |
| Human preference score | 65.9 | – |
| Knowledge score | 61.2 | 75.4 |
| Long context score | 64.1 | 67.7 |
| Maths score | 66.9 | – |
| Multimodal score | 62.6 | 67.1 |
| Reasoning score | 67.8 | 95.0 |
| Blended price $/M | $4.00 | $4.00 |
| Output speed | 68 tok/s | 126 tok/s |
| Time to first answer | 10.1 s | 107.2 s |
| Context window | 1M | 1.1M |
| SciCode | 48.6% | – |
| WeirdML | 68.8% | – |
| LMArena Text | 1461 | – |
| LMArena Hard Prompts | 1489 | – |
| LMArena Coding | 1521 | – |
| LMArena WebDev | 1537 | – |
| LMArena Vision | 1277 | – |
| LMArena Agent | 6 | – |
| AA Intelligence Index | 31.7 | 47.5 |
| AA-LCR | 76.7% | 83.7% |
| MMMU-Pro | – | 83.3% |
| AA-Omniscience | -3.7 | 27.1 |
| Humanity's Last Exam (AA) | 35.7% | 47.9% |
| SciCode (AA) | 54.3% | 57.6% |
| CritPt | 15.1% | 30.9% |
| GDPval (AA) | 37.3% | 49.4% |
| LMArena Maths | 1476 | – |
| LMArena Creative Writing | 1437 | – |
| LMArena Instruction Following | 1465 | – |
| LMArena Multi-turn | 1473 | – |
| LMArena Longer Queries | 1482 | – |
| LMArena Document | 1476 | – |
| DeepSWE | 48.2% | – |
| LMCA | 50.0% | – |
| DTBench | 84.5% | – |
| CursorBench | 30.8% | – |
| ALE-Bench | 1463.1 | – |
| Terminal-Bench 4.0 (AA) | 5.0% | 43.9% |
| AutomationBench | – | 61.6% |
| GDP.pdf | – | 24.8% |
| MLCR | – | 16.1% |
| AA-Omniscience: accuracy | 37.4% | 54.5% |
| AA-Omniscience: non-hallucination | 34.3% | 39.9% |
| AA-Briefcase | – | 1483 |
Data as of 2026-09-23. Best configuration of each model; every score links to its source on the model pages.
Claude Sonnet 5 vs GPT-6 Sol: questions
- Is Claude Sonnet 5 better than GPT-6 Sol?
- GPT-6 Sol (max) leads on quality: 67.7 vs 61.6. The BenchLeader Index combines every independent quality benchmark; GPT-6 Sol (max) is ahead overall as of 2026-09-23, but check the category scores for your use.
- Which is cheaper, Claude Sonnet 5 or GPT-6 Sol?
- Claude Sonnet 5 is cheaper: $4.00 against $4.00 per million tokens, blended at three input tokens per output token.
- Which is faster, Claude Sonnet 5 or GPT-6 Sol?
- GPT-6 Sol streams faster: 126 against 68 output tokens per second.
- Which has the larger context window?
- GPT-6 Sol accepts more context: 1.1M against 1M tokens.