Claude Opus 4.8 vs GPT-6.1 Sol
Claude Opus 4.8 
GPT-6.1 Sol Verdict
- GPT-6.1 Sol (max) leads on quality: 69.3 vs 62.4.
- Claude Opus 4.8 (max) is stronger in instruction following.
- GPT-6.1 Sol (max) is stronger in agents & tools, coding, composite, knowledge, long context, maths, reasoning, human preference, multimodal.
- GPT-6.1 Sol (max) is 2.5× cheaper ($4.00 vs $10.00 per 1M blended).
| Metric | Claude Opus 4.8 (max) | GPT-6.1 Sol (max) |
|---|---|---|
| BenchLeader Index | 62.4 | 69.3 |
| Agents & tools score | 56.5 | 63.9 |
| Coding score | 59.6 | 72.4 |
| Composite score | 65.4 | 79.0 |
| Instruction following score | 62.0 | – |
| Knowledge score | 67.2 | 78.8 |
| Long context score | 64.0 | 66.8 |
| Maths score | 68.4 | 72.5 |
| Reasoning score | 69.2 | 76.4 |
| Human preference score | – | 68.1 |
| Multimodal score | – | 66.2 |
| Blended price $/M | $10.00 | $4.00 |
| Output speed | 58 tok/s | 56 tok/s |
| Time to first answer | 33.7 s | 326.9 s |
| Context window | 1M | 1.1M |
| GPQA Diamond | 91.0% | 95.4% |
| FrontierMath Tiers 1–3 | 80.0% | 93.7% |
| FrontierMath Tier 4 | 56.1% | 100.0% |
| OTIS Mock AIME | 98.3% | 100.0% |
| SimpleQA Verified | 53.0% | 73.9% |
| Terminal-Bench | 23.6% | 58.2% |
| OSWorld-Verified 2.0 | 20.6% | – |
| SciCode | 53.5% | 54.2% |
| APEX-Agents | 48.9% | 60.0% |
| ProofBench | 69.0% | – |
| LMArena Text | – | 1484 |
| LMArena Hard Prompts | – | 1507 |
| LMArena Coding | – | 1545 |
| LMArena WebDev | – | 1755 |
| LMArena Vision | – | 1288 |
| LMArena Agent | – | 11.7 |
| LiveBench | 76.2% | 81.6% |
| LiveBench Reasoning | 89.2% | 92.6% |
| LiveBench Coding | 81.8% | 80.4% |
| LiveBench Agentic Coding | 50.5% | 54.5% |
| LiveBench Mathematics | 94.3% | 96.8% |
| LiveBench Data Analysis | 66.0% | 82.7% |
| LiveBench Language | 79.7% | 90.1% |
| LiveBench Instruction Following | 72.0% | 74.2% |
| AA Intelligence Index v4.3.2 | 41.8 | 51.8 |
| IFBench | 62.2% | – |
| AA-LCR | 77.7% | 83.0% |
| MMMU-Pro | – | 86.0% |
| AA-Omniscience | 28.8 | 41.5 |
| Terminal-Bench Hard | 58.3% | – |
| GPQA Diamond (AA) | 92.0% | – |
| Humanity's Last Exam (AA) | 48.7% | 52.9% |
| SciCode (AA) | 54.4% | 54.2% |
| τ²-Bench Telecom (AA) | 94.4% | – |
| IOI | – | 96.9% |
| Vals Index | – | 61.1 |
| AIME 2026 | 100.0% | – |
| HMMT February 2026 | 95.5% | – |
| MathArena Apex | 81.3% | – |
| MCP Atlas | 82.2% | – |
| ARC-AGI-1 | 92.5% | 96.5% |
| ARC-AGI-2 | – | 94.2% |
| ARC-AGI-3 | – | 96.2% |
| CritPt | 20.9% | 31.7% |
| GDPval-AA v2.1 | 47.8% | 53.8% |
| τ³-Banking (AA) | 34.2% | – |
| Analyst Agent (AA) | 45.0% | 50.0% |
| BioMysteryBench | – | 79.6% |
| Code Migration | – | 65.1% |
| CyberBench | – | 39.3% |
| Excel Modeling Benchmark | – | 70.8% |
| Finance Agent v2 | – | 52.0% |
| Harvey's Legal Agent Benchmark | – | 5.4% |
| Legal Research Bench | – | 38.5% |
| MedCode | – | 48.8% |
| MedScribe | – | 86.5% |
| MysteryMechanism | – | 46.4% |
| Public Benefits Bench | – | 59.3% |
| SAGE | – | 46.5% |
| SREBench | – | 50.8% |
| Tax Agent Bench | – | 62.3% |
| Terminal-Bench 4.0 (Vals) | – | 55.0% |
| Vibe Code Bench v1.1 | – | 88.9% |
| FORTRESS | 18.2% | – |
| LMArena Maths | – | 1488 |
| LMArena Creative Writing | – | 1462 |
| LMArena Instruction Following | – | 1488 |
| LMArena Multi-turn | – | 1487 |
| LMArena Longer Queries | – | 1496 |
| Chess Puzzles | 34.0% | 61.0% |
| EBR-bench | 28.6% | 54.3% |
| Mystery Game Puzzles | 36.0% | 80.0% |
| PostTrainBench | 32.9% | – |
| DeepSWE v1.1 | 59.0% | – |
| LMCA | 57.5% | – |
| DTBench | 94.9% | – |
| Vending-Bench 2 | 2992.3 | – |
| GDP.pdf | 24.0% | – |
| Terminal-Bench 4.0 (AA) | 21.7% | 56.1% |
| Terminal-Bench 2.1 (AA) | 84.6% | – |
| AutomationBench | – | 64.9% |
| GDP.pdf | – | 31.0% |
| MLCR | – | 33.9% |
| Harvey LAB | – | 6.9% |
| AA-Omniscience: accuracy | 48.8% | 62.1% |
| AA-Omniscience: non-hallucination | 60.8% | 45.7% |
| AA-Briefcase v1.1 | – | 1557 |
Data as of 2026-10-11. Best configuration of each model; every score links to its source on the model pages.
Claude Opus 4.8 vs GPT-6.1 Sol: questions
- Is Claude Opus 4.8 better than GPT-6.1 Sol?
- GPT-6.1 Sol (max) leads on quality: 69.3 vs 62.4. The BenchLeader Index combines every independent quality benchmark; GPT-6.1 Sol (max) is ahead overall as of 2026-10-11, but check the category scores for your use.
- Is Claude Opus 4.8 better than GPT-6.1 Sol for coding?
- GPT-6.1 Sol scores higher in coding (72 vs 60 on the category index, where 50 is average).
- Is Claude Opus 4.8 better than GPT-6.1 Sol for agentic tasks?
- GPT-6.1 Sol scores higher in agentic tasks (64 vs 57 on the category index, where 50 is average).
- Which is cheaper, Claude Opus 4.8 or GPT-6.1 Sol?
- GPT-6.1 Sol is cheaper: $4.00 against $10.00 per million tokens, blended at three input tokens per output token.
- Which is faster, Claude Opus 4.8 or GPT-6.1 Sol?
- Claude Opus 4.8 streams faster: 58 against 56 output tokens per second.
- Which has the larger context window?
- GPT-6.1 Sol accepts more context: 1.1M against 1M tokens.