Claude 3.5 Sonnet vs Claude Fable 5
Head to head on 12 shared benchmarks, with price, context window, and release dates.
Benchmark scores
58evals · sort by any column, ⤢ to expand fullscreen
| Model | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Claude Fable 5 Anthropic | 71.8% | 1944elo | 83 | 85.9% | 55.5% | 81.4% | 78.6% | 59.9% | 88.5% | 68.9% | 61.0% | 76.9% | - | - | - | - | - | 17.4% | 83.9% | 38.6% | 86.0% | - | 1313elo | 78.0% | 56.3% | 29.3% | - | 29.8% | 1932elo | - | 66.0% | 63.5% | - | 13.3% | 80.0% | 93.9% | 87.3% | - | - | 56.1% | 88.5% | - | 85.0% | 95.0% | - | 51.9% | - | - | - | 80.3% | 88.0% | 62.9% | - | 61.4% | 74.2% | 90.4% | - | 98.5% | 69.0% |
| Claude 3.5 Sonnet Anthropic | 53.6% | 1451elo | 58.4 | 55.3% | 4.1% | 63.7% | 65.6% | 69.2% | 56.4% | 64.1% | 36.6% | 70.2% | 51.6% | 15.7% | 3.3% | 52.4% | 24.2% | - | - | - | - | 28.0% | - | - | - | - | 2.1% | - | - | 96.4 | - | - | 0.0% | - | - | - | - | 38.1% | 77.1% | - | - | 77.2% | - | - | 0.0% | - | 51.3% | 25.3% | 63.4% | - | - | - | 0.98 | - | - | - | 62.6% | - | 42.7% |
2 / 2 models
| Attribute | Claude 3.5 Sonnet Anthropic | Claude Fable 5 Anthropic |
|---|---|---|
| Description | Claude Sonnet 3.5 is an AI model from Anthropic. | 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. |
| Family | Claude | Claude |
| Params | - | - |
| Open weights | closed | closed |
| License | proprietary | - |
| Released | 22 Oct 2024 | 9 Jun 2026 |
| Context | 200,000 | 1,000,000 |
| Input $/1M | $3.00 | $10.00 |
| Output $/1M | $15.00 | $50.00 |
| Cache read $/1M | - | $1.000 |
| Cache write $/1M | - | $12.500 |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text, image | text, image, file |
| Providers | - | - |
| Publisher | Anthropic | Anthropic |
| Reported scores | MortgageTax64.1% Traveling Salesman0.98 (3 samples) SWE-bench Verified63.4% (SWE-bench) SWE-bench Lite51.3% (SWE-bench) SWE-bench Multimodal25.3% (SWE-bench) |
FAQ
- Is Claude 3.5 Sonnet or Claude Fable 5 better?
- Across the 12 benchmarks both models report on Sophon, Claude Fable 5 leads on 11 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude 3.5 Sonnet and Claude Fable 5 compare on GPQA Diamond?
- Claude 3.5 Sonnet scores 55.3% and Claude Fable 5 scores 85.9% on GPQA Diamond.
- Which is cheaper, Claude 3.5 Sonnet or Claude Fable 5?
- Claude 3.5 Sonnet is cheaper at $15.00 per million output tokens against $50.00 for Claude Fable 5 - about 3.3x.
- When were Claude 3.5 Sonnet and Claude Fable 5 released?
- Claude 3.5 Sonnet was released 22 Oct 2024 by Anthropic. Claude Fable 5 was released 9 Jun 2026 by Anthropic.
Other head-to-heads
56Claude Fable 5 vs Claude Opus 4.840 shared evalsClaude Fable 5 vs GPT-5.539 shared evalsClaude Fable 5 vs Gemini 3.1 Pro Preview36 shared evalsClaude Fable 5 vs Claude Sonnet 4.628 shared evalsClaude Fable 5 vs Claude Opus 4.728 shared evalsClaude Fable 5 vs GPT-5.426 shared evalsClaude Fable 5 vs Claude Opus 4.626 shared evalsClaude Fable 5 vs Kimi K2.526 shared evalsClaude Fable 5 vs GLM 5.125 shared evalsClaude Fable 5 vs Claude Sonnet 4.524 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 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 evalsClaude 3.5 Sonnet vs GPT-4o22 shared evalsClaude Fable 5 vs GPT-5 Nano21 shared evalsClaude 3.5 Sonnet vs Claude 4 Sonnet21 shared evalsClaude 3.5 Sonnet vs Gemini 2.5 Pro21 shared evalsClaude Fable 5 vs DeepSeek V3.220 shared evalsClaude Fable 5 vs GLM 4.720 shared evalsClaude 3.5 Sonnet vs Claude Sonnet 4.519 shared evalsClaude 3.5 Sonnet vs GPT-5 Mini19 shared evalsClaude Fable 5 vs Gemini 2.5 Pro19 shared evalsClaude 3.5 Sonnet vs GPT-4o-mini19 shared evalsClaude Fable 5 vs GPT-6 Astra18 shared evalsClaude Fable 5 vs gpt-oss-120b18 shared evalsClaude 3.5 Sonnet vs GPT-4.118 shared evalsClaude 3.5 Sonnet vs GPT-4.1 Mini17 shared evalsClaude 3.5 Sonnet vs GPT-517 shared evalsClaude 3.5 Sonnet vs GPT-5 Nano17 shared evalsClaude 3.5 Sonnet vs GPT-5.217 shared evalsClaude 3.5 Sonnet vs Claude Opus 4.517 shared evalsClaude 3.5 Sonnet vs DeepSeek V3.217 shared evalsClaude Fable 5 vs GPT-516 shared evalsClaude 3.5 Sonnet vs GPT-4.1 Nano16 shared evalsClaude 3.5 Sonnet vs gpt-oss-120b16 shared evalsClaude 3.5 Sonnet vs Kimi K2.515 shared evalsClaude 3.5 Sonnet vs Grok 4.1 Fast15 shared evalsClaude 3.5 Sonnet vs GLM 4.715 shared evalsClaude 3.5 Sonnet vs GPT-5.514 shared evalsClaude 3.5 Sonnet vs Claude Opus 4.614 shared evalsClaude 3.5 Sonnet vs Gemini 3.1 Pro Preview13 shared evalsClaude 3.5 Sonnet vs Claude Opus 4.813 shared evalsClaude Fable 5 vs GPT-4o13 shared evalsClaude 3.5 Sonnet vs GPT-5.413 shared evalsClaude 3.5 Sonnet vs GLM 5.113 shared evalsClaude 3.5 Sonnet vs Claude Sonnet 4.613 shared evalsClaude 3.5 Sonnet vs Claude Opus 4.713 shared evalsClaude Fable 5 vs GPT-4o-mini12 shared evalsClaude Fable 5 vs GPT-4.1 Nano11 shared evalsClaude 3.5 Sonnet vs Qwen3.6 Plus11 shared evalsClaude Fable 5 vs GPT-4.1 Mini10 shared evalsClaude Fable 5 vs GPT-4.110 shared evalsClaude 3.5 Sonnet vs GPT-6 Astra6 shared evals
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