Claude Fable 5 vs GPT-5.2
Head to head on 24 shared benchmarks, with price, context window, and release dates.
Benchmark scores
59evals · sort by any column, ⤢ to expand fullscreen
| Model | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Claude Fable 5 Anthropic | 71.8% | 90.0% | 1933elo | 83 | 92.6% | 55.5% | 63.5% | 81.4% | 78.6% | 80.0% | 59.9% | 88.5% | 93.9% | 87.3% | 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% | - | - | - | - | 1340elo | 78.0% | 56.3% | 29.3% | - | 29.8% | 1932elo | - | 66.0% | - | - | 13.3% | - | - | - | - | - | 85.0% | - | - | - | 80.3% | 88.0% | 66.0% | 74.2% | 69.4% |
| GPT-5.2 OpenAI | 65.9% | 60.0% | 1699elo | 71.6 | 71.2% | 8.0% | 47.4% | 78.7% | 76.1% | 78.2% | 61.8% | 79.8% | 93.2% | 83.2% | 49.7% | 84.4% | 67.1% | 15.0% | 49.3% | 40.4% | 75.8% | 31.8% | 53.5% | 46.5% | 51.0% | 100 | - | 100.0% | - | - | 0.0% | 16.7% | 40.6% | 9.4% | - | - | - | - | 40.7% | - | - | 12.93 | - | 85.0% | 79.0% | - | 66.9% | 24.0% | 72.0% | 81.4% | 96.7 | - | 18.7% | 66.7% | 71.8% | - | - | - | - | 56.3% |
2 / 2 models
| Attribute | Claude Fable 5 Anthropic | GPT-5.2 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. | GPT-5.2 is an AI model from OpenAI. |
| Family | Claude | GPT |
| Params | - | - |
| Open weights | closed | closed |
| License | - | proprietary |
| Released | 9 Jun 2026 | 11 Dec 2025 |
| Context | 1,000,000 | 400,000 |
| Input $/1M | $10.00 | $1.75 |
| Output $/1M | $50.00 | $14.00 |
| Cache read $/1M | $1.000 | $0.175 |
| Cache write $/1M | $12.500 | - |
| Speed | 66 tok/s | 0 tok/s |
| Latency | 49.62 s | 0.00 s |
| Modalities | text, image, file | file, image, text |
| Providers | - | - |
| 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-5.2 better?
- Across the 24 benchmarks both models report on Sophon, Claude Fable 5 leads on 23 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude Fable 5 and GPT-5.2 compare on GPQA Diamond?
- Claude Fable 5 scores 92.6% and GPT-5.2 scores 71.2% on GPQA Diamond.
- Which is cheaper, Claude Fable 5 or GPT-5.2?
- GPT-5.2 is cheaper at $14.00 per million output tokens against $50.00 for Claude Fable 5 - about 3.6x.
- When were Claude Fable 5 and GPT-5.2 released?
- Claude Fable 5 was released 9 Jun 2026 by Anthropic. GPT-5.2 was released 11 Dec 2025 by OpenAI.
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