Claude Fable 5 vs GPT-5
Head to head on 16 shared benchmarks, with price, context window, and release dates.
Benchmark scores
86evals · sort by any column, ⤢ to expand fullscreen
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| Claude Fable 5 Anthropic | 71.8% | 1933elo | 83 | 92.6% | 55.5% | 63.5% | 56.1% | 88.5% | 68.9% | 95.0% | 51.9% | 60.2% | 76.9% | 62.9% | 90.4% | 98.5% | - | - | - | - | - | - | 17.4% | - | 83.9% | 38.6% | - | - | - | 90.0% | - | - | - | 1340elo | 78.0% | 56.3% | - | 29.3% | - | 29.8% | - | 1932elo | - | - | - | 66.0% | - | - | 13.3% | - | 81.4% | 78.6% | 80.0% | 59.9% | 88.5% | 93.9% | 87.3% | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 85.0% | - | - | - | 80.3% | - | 88.0% | - | - | 66.0% | 74.2% | - | - | - | 69.4% |
| GPT-5 OpenAI | 61.1% | 1623elo | 72.8 | 68.6% | 6.6% | 45.0% | 49.6% | 83.7% | 65.5% | 18.0% | 43.7% | 37.8% | 73.4% | 12.9% | 20.1% | 0.0% | 46.7% | 91.1% | 88.0% | 94.6% | 48.3% | 0.0% | - | 0.15 | - | - | 0.0% | 68.1% | 4.58 | - | 57.7% | 80.0% | 80.0% | - | - | - | 91.7% | - | 32.4% | - | 0.0% | - | 88.9% | 83.3% | 100.0% | - | 48.9% | 83.4% | - | 58.2% | - | - | - | - | - | - | - | 54.3% | 37.5% | 0.52 | 1.62 | 100.0% | 86.1% | 0.0% | 92.7% | 92.7% | 93.3% | 10.0% | 82.0% | 0.0% | 60.0% | 0.26 | - | 0.0% | 74.9% | 74.4% | - | 2.34 | - | 87.5% | 0.86 | - | - | 54.8% | 90.0% | 90.0% | 56.7% |
2 / 2 models
| Attribute | Claude Fable 5 Anthropic | GPT-5 OpenAI |
|---|---|---|
| Description | Claude Fable 5 is Anthropic's most capable widely released model, built for the most demanding reasoning and long-horizon agentic work. Shares its base model with the invitation-only Claude Mythos 5. | OpenAI's August 2025 unified frontier model that auto-routes between a fast model and a deeper "thinking" variant. |
| Family | Claude | GPT 5 |
| Params | - | Undisclosed (closed) |
| Open weights | closed | closed |
| License | - | Proprietary |
| Released | 9 Jun 2026 | 7 Aug 2025 |
| Context | 1,000,000 | 400,000 |
| Input $/1M | $10.00 | - |
| Output $/1M | $50.00 | - |
| Cache read $/1M | $1.000 | $0.125 |
| Cache write $/1M | $12.500 | - |
| Speed | 66 tok/s | 0 tok/s |
| Latency | 49.62 s | 0.00 s |
| Modalities | text, image, file | text, image, file |
| Providers | - | openai |
| Publisher | Anthropic | OpenAI |
| Reported scores | Finance Agent (v2)56.3% IFBench63.5% (AA) Swebenchpro80.3% LiveBench - Math93.9% (LiveBench) LiveBench - Coding78.6% (LiveBench) |
FAQ
- Is Claude Fable 5 or GPT-5 better?
- Across the 16 benchmarks both models report on Sophon, Claude Fable 5 leads on 16 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude Fable 5 and GPT-5 compare on GPQA Diamond?
- Claude Fable 5 scores 92.6% and GPT-5 scores 68.6% on GPQA Diamond.
- When were Claude Fable 5 and GPT-5 released?
- Claude Fable 5 was released 9 Jun 2026 by Anthropic. GPT-5 was released 7 Aug 2025 by OpenAI.
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