Claude Fable 5 vs GPT-6 Sol
Claude Fable 5 
GPT-6 Sol Verdict
- Claude Fable 5 (thinking) leads on quality: 70.0 vs 67.7.
- Claude Fable 5 (thinking) is stronger in agents & tools, composite, instruction following, knowledge.
- GPT-6 Sol (max) is stronger in long context, reasoning, multimodal.
- GPT-6 Sol (max) is 5.0× cheaper ($4.00 vs $20.00 per 1M blended).
- GPT-6 Sol (max) streams 1.9× faster (126 vs 67 tokens per second).
| Metric | Claude Fable 5 (thinking) | GPT-6 Sol (max) |
|---|---|---|
| BenchLeader Index | 70.0 | 67.7 |
| Agents & tools score | 74.1 | – |
| Composite score | 88.8 | 86.2 |
| Instruction following score | 63.0 | – |
| Knowledge score | 82.9 | 75.4 |
| Long context score | 67.0 | 67.7 |
| Reasoning score | 89.0 | 95.0 |
| Multimodal score | – | 67.1 |
| Blended price $/M | $20.00 | $4.00 |
| Output speed | 67 tok/s | 126 tok/s |
| Time to first answer | 108.0 s | 107.2 s |
| Context window | 1M | 1.1M |
| AA Intelligence Index | 49.6 | 47.5 |
| IFBench | 63.5% | – |
| AA-LCR | 82.3% | 83.7% |
| MMMU-Pro | – | 83.3% |
| AA-Omniscience | 43.3 | 27.1 |
| Terminal-Bench Hard | 62.9% | – |
| GPQA Diamond (AA) | 92.6% | – |
| Humanity's Last Exam (AA) | 55.5% | 47.9% |
| SciCode (AA) | 61.0% | 57.6% |
| τ²-Bench Telecom (AA) | 98.5% | – |
| Kagi LLM Benchmark | 91.4% | – |
| CritPt | 28.6% | 30.9% |
| GDPval (AA) | 54.8% | 49.4% |
| τ²-Bench Banking (AA) | 38.1% | – |
| Analyst Agent (AA) | 48.8% | – |
| Terminal-Bench 4.0 (AA) | 42.4% | 43.9% |
| Terminal-Bench 2.1 (AA) | 84.6% | – |
| AutomationBench | 54.1% | 61.6% |
| GDP.pdf | 24.0% | 24.8% |
| MLCR | 64.4% | 16.1% |
| Harvey LAB | 93.6% | – |
| EnterpriseOps-Gym | 51.1% | – |
| AA-Omniscience: accuracy | 65.3% | 54.5% |
| AA-Omniscience: non-hallucination | 36.4% | 39.9% |
| AA-Briefcase | 1543 | 1483 |
Data as of 2026-09-23. Best configuration of each model; every score links to its source on the model pages.
Claude Fable 5 vs GPT-6 Sol: questions
- Is Claude Fable 5 better than GPT-6 Sol?
- Claude Fable 5 (thinking) leads on quality: 70.0 vs 67.7. The BenchLeader Index combines every independent quality benchmark; Claude Fable 5 (thinking) is ahead overall as of 2026-09-23, but check the category scores for your use.
- Which is cheaper, Claude Fable 5 or GPT-6 Sol?
- GPT-6 Sol is cheaper: $4.00 against $20.00 per million tokens, blended at three input tokens per output token.
- Which is faster, Claude Fable 5 or GPT-6 Sol?
- GPT-6 Sol streams faster: 126 against 67 output tokens per second.
- Which has the larger context window?
- GPT-6 Sol accepts more context: 1.1M against 1M tokens.