Claude Opus 4.5 vs GPT-6 Sol
Claude Opus 4.5 
GPT-6 Sol Verdict
- GPT-6 Sol (max) leads on quality: 67.7 vs 60.5.
- Claude Opus 4.5 (thinking) is stronger in agents & tools, coding, instruction following, maths.
- GPT-6 Sol (max) is stronger in composite, knowledge, long context, multimodal, reasoning.
- GPT-6 Sol (max) is 2.5× cheaper ($4.00 vs $10.00 per 1M blended).
- GPT-6 Sol (max) streams 2.6× faster (126 vs 49 tokens per second).
| Metric | Claude Opus 4.5 (thinking) | GPT-6 Sol (max) |
|---|---|---|
| BenchLeader Index | 60.5 | 67.7 |
| Agents & tools score | 74.5 | – |
| Coding score | 60.6 | – |
| Composite score | 64.1 | 86.2 |
| Instruction following score | 54.8 | – |
| Knowledge score | 60.5 | 75.4 |
| Long context score | 64.4 | 67.7 |
| Maths score | 64.0 | – |
| Multimodal score | 57.6 | 67.1 |
| Reasoning score | 55.6 | 95.0 |
| Blended price $/M | $10.00 | $4.00 |
| Output speed | 49 tok/s | 126 tok/s |
| Time to first answer | 17.8 s | 107.2 s |
| Context window | 200k | 1.1M |
| AA Intelligence Index | 29.1 | 47.5 |
| IFBench | 58.0% | – |
| AA-LCR | 77.3% | 83.7% |
| MMMU-Pro | 74.0% | 83.3% |
| AA-Omniscience | 14 | 27.1 |
| Terminal-Bench Hard | 47.0% | – |
| GPQA Diamond (AA) | 86.6% | – |
| Humanity's Last Exam (AA) | 30.1% | 47.9% |
| SciCode (AA) | – | 57.6% |
| τ²-Bench Telecom (AA) | 89.5% | – |
| AIME (Vals) | 95.4% | – |
| LiveCodeBench | 83.7% | – |
| MMLU-Pro | 87.3% | – |
| LegalBench | 84.6% | – |
| CorpFin | 65.1% | – |
| TaxEval | 74.9% | – |
| MedQA | 95.9% | – |
| MGSM | 95.2% | – |
| SWE-bench (Vals) | 76.4% | – |
| GPQA Diamond (Vals) | 85.9% | – |
| MultiChallenge | 59.0% | – |
| PRBench Finance | 46.2% | – |
| PRBench Legal | 44.2% | – |
| VISTA | 46.4% | – |
| MultiNRC | 48.6% | – |
| TutorBench | 51.2% | – |
| Kagi LLM Benchmark | 80.2% | – |
| ARC-AGI-1 | 80.0% | – |
| ARC-AGI-2 | 37.6% | – |
| CritPt | 4.6% | 30.9% |
| GDPval (AA) | – | 49.4% |
| CaseLaw v2 | 62.6% | – |
| MedCode | 49.2% | – |
| MedScribe | 85.3% | – |
| MMMU-Pro (Vals) | 83.0% | – |
| MortgageTax | 67.7% | – |
| SAGE | 52.1% | – |
| Terminal-Bench 2.0 (Vals) | 53.9% | – |
| Vibe Code Bench v1.1 | 20.6% | – |
| FORTRESS | 9.6% | – |
| MASK | 92.5% | – |
| Terminal-Bench 4.0 (AA) | – | 43.9% |
| AutomationBench | – | 61.6% |
| GDP.pdf | – | 24.8% |
| MLCR | – | 16.1% |
| AA-Omniscience: accuracy | 46.6% | 54.5% |
| AA-Omniscience: non-hallucination | 39.0% | 39.9% |
| AA-Briefcase | – | 1483 |
| DeepSearchQA | 24.0% | – |
Data as of 2026-09-23. Best configuration of each model; every score links to its source on the model pages.
Claude Opus 4.5 vs GPT-6 Sol: questions
- Is Claude Opus 4.5 better than GPT-6 Sol?
- GPT-6 Sol (max) leads on quality: 67.7 vs 60.5. 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 Opus 4.5 or GPT-6 Sol?
- GPT-6 Sol is cheaper: $4.00 against $10.00 per million tokens, blended at three input tokens per output token.
- Which is faster, Claude Opus 4.5 or GPT-6 Sol?
- GPT-6 Sol streams faster: 126 against 49 output tokens per second.
- Which has the larger context window?
- GPT-6 Sol accepts more context: 1.1M against 200k tokens.