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% | 1943elo | 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% | - | - | - | 87.0% | - | - | - | 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% | - | - | 61.4% | 74.2% | - | - | - | 69.2% |
| GPT-5 OpenAI | 61.1% | 1627elo | 72.8 | 85.4% | 28.5% | 73.1% | 49.6% | 83.7% | 65.5% | 18.0% | 43.7% | 42.9% | 73.4% | 32.6% | 20.1% | 84.8% | 46.7% | 91.1% | 88.0% | 94.6% | 94.3% | 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% | - | - | - | - | - | - | - | 84.6% | 37.5% | 0.52 | 1.62 | 100.0% | 99.4% | 0.0% | 92.7% | 92.7% | 93.3% | 10.0% | 87.1% | 0.0% | 60.0% | 0.26 | - | 0.0% | 74.9% | 74.4% | - | 2.34 | - | 87.5% | 0.86 | - | - | 54.8% | 90.0% | 90.0% | 61.9% |
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 | $1.25 |
| Output $/1M | $50.00 | $10.00 |
| Cache read $/1M | $1.000 | $0.125 |
| Cache write $/1M | $12.500 | - |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 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) | SWE-bench74.9% (Verified) GPQA Diamond85.4% (AA) Humanity's Last Exam (HLE)28.5% (AA) IFBench73.1% (AA) |
FAQ
- Is Claude Fable 5 or GPT-5 better?
- Across the 16 benchmarks both models report on Sophon, Claude Fable 5 leads on 15 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 85.4% on GPQA Diamond.
- Which is cheaper, Claude Fable 5 or GPT-5?
- GPT-5 is cheaper at $10.00 per million output tokens against $50.00 for Claude Fable 5 - about 5.0x.
- 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.
Other head-to-heads
56GPT-4.1 Mini vs GPT-541 shared evalsClaude Fable 5 vs Claude Opus 4.840 shared evalsClaude Fable 5 vs GPT-5.539 shared evalsGPT-5 vs GPT-5 Mini36 shared evalsClaude Fable 5 vs Gemini 3.1 Pro Preview36 shared evalsClaude Sonnet 4.5 vs GPT-531 shared evalsGPT-5 vs GPT-5 Nano28 shared evalsGPT-4.1 vs GPT-528 shared evalsClaude Fable 5 vs Claude Sonnet 4.628 shared evalsClaude Fable 5 vs Claude Opus 4.728 shared evalsClaude Fable 5 vs Claude Opus 4.626 shared evalsClaude Fable 5 vs GPT-5.426 shared evalsClaude Fable 5 vs Kimi K2.526 shared evalsClaude 4 Sonnet vs GPT-525 shared evalsClaude Fable 5 vs GLM 5.125 shared evalsClaude Fable 5 vs GPT-5.4 Mini25 shared evalsClaude Fable 5 vs Claude Sonnet 4.524 shared evalsGemini 2.5 Pro vs GPT-524 shared evalsClaude Fable 5 vs GPT-5.224 shared evalsClaude Fable 5 vs Qwen3.6 Plus24 shared evalsClaude Fable 5 vs GPT-5 Mini23 shared evalsGPT-5 vs GPT-5.223 shared evalsClaude Opus 4.5 vs GPT-523 shared evalsClaude Fable 5 vs Claude Opus 4.523 shared evalsClaude Fable 5 vs Grok 4.1 Fast23 shared evalsClaude 4 Sonnet vs Claude Fable 522 shared evalsGPT-4.1 Nano vs GPT-521 shared evalsClaude Fable 5 vs GPT-5 Nano21 shared evalsGPT-5 vs Grok 4.1 Fast20 shared evalsClaude Fable 5 vs DeepSeek V3.220 shared evalsClaude Fable 5 vs GLM 4.720 shared evalsGemini 3.1 Pro Preview vs GPT-519 shared evalsClaude Opus 4.6 vs GPT-519 shared evalsGPT-5 vs GPT-5.419 shared evalsDeepSeek V3.2 vs GPT-519 shared evalsGPT-4o vs GPT-519 shared evalsClaude Fable 5 vs Gemini 2.5 Pro19 shared evalsGPT-5 vs GPT-5.518 shared evalsGPT-5 vs Kimi K2.518 shared evalsClaude Fable 5 vs GPT-6 Astra18 shared evalsClaude Fable 5 vs gpt-oss-120b18 shared evalsClaude Opus 4.8 vs GPT-517 shared evalsClaude Opus 4.7 vs GPT-517 shared evalsGPT-5 vs gpt-oss-120b17 shared evalsGLM 4.7 vs GPT-517 shared evalsGPT-4o-mini vs GPT-516 shared evalsClaude Sonnet 4.6 vs GPT-516 shared evalsGLM 5.1 vs GPT-516 shared evalsGPT-5 vs GPT-5.4 Mini16 shared evalsGPT-5 vs Qwen3.6 Plus15 shared evalsClaude Fable 5 vs GPT-4o13 shared evalsGPT-5 vs GPT-6 Astra12 shared evalsClaude Fable 5 vs GPT-4o-mini12 shared evalsClaude Fable 5 vs GPT-4.1 Nano11 shared evalsClaude Fable 5 vs GPT-4.1 Mini10 shared evalsClaude Fable 5 vs GPT-4.110 shared evals
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