Claude Fable 5 vs Gemini 3.5 Flash
Head to head on 27 shared benchmarks, with price, context window, and release dates.
Benchmark scores
42evals · sort by any column, ⤢ to expand fullscreen
| Model | |||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Claude Fable 5 Anthropic | 71.8% | 90.0% | 1340elo | 83 | 56.3% | 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% | 66.0% | 74.2% | 90.4% | 98.5% | 17.4% | 83.9% | 38.6% | 1933elo | 78.0% | 29.3% | - | 29.8% | 1932elo | 66.0% | 13.3% | - | 85.0% | 80.3% | 88.0% | 69.4% |
| Gemini 3.5 Flash Google (Alphabet Inc.) | 64.7% | 26.0% | 1087elo | 71.8 | 57.9% | 92.2% | 42.7% | 76.3% | 78.9% | 78.2% | 64.9% | 75.6% | 84.6% | 88.2% | 82.0% | 55.8% | 76.6% | 68.1% | 31.0% | 49.9% | 53.1% | 74.4% | 40.9% | 53.1% | 62.9% | 48.7% | 95.3% | - | - | - | - | - | - | 39.0% | - | - | - | - | 76.3% | - | - | - | 64.3% |
2 / 2 models
| Attribute | Claude Fable 5 Anthropic | Gemini 3.5 Flash Google (Alphabet Inc.) |
|---|---|---|
| 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. | Gemini 3.5 Flash is an AI model from Google (Alphabet Inc.). |
| Family | Claude | Gemini |
| Params | - | - |
| Open weights | closed | closed |
| License | - | proprietary |
| Released | 9 Jun 2026 | 19 May 2026 |
| Context | 1,000,000 | 1,048,576 |
| Input $/1M | $10.00 | $1.50 |
| Output $/1M | $50.00 | $9.00 |
| Cache read $/1M | $1.000 | $0.150 |
| Cache write $/1M | $12.500 | $0.083 |
| Speed | 59 tok/s | 0 tok/s |
| Latency | 54.88 s | 0.00 s |
| Modalities | text, image, file | text, image, video, file, audio |
| Providers | - | - |
| Publisher | Anthropic | Google (Alphabet Inc.) |
| Reported scores | Finance Agent (v2)56.3% IFBench63.5% (AA) Swebenchpro80.3% LiveBench - Math93.9% (LiveBench) LiveBench - Coding78.6% (LiveBench) | Humanity's Last Exam (HLE)42.7% (AA) τ²-bench (Tau²-bench)95.3% (AA) Terminal-Bench (Hard)40.9% (AA) Vals Index53.1% |
FAQ
- Is Claude Fable 5 or Gemini 3.5 Flash better?
- Across the 27 benchmarks both models report on Sophon, Claude Fable 5 leads on 24 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude Fable 5 and Gemini 3.5 Flash compare on GPQA Diamond?
- Claude Fable 5 scores 92.6% and Gemini 3.5 Flash scores 92.2% on GPQA Diamond.
- Which is cheaper, Claude Fable 5 or Gemini 3.5 Flash?
- Gemini 3.5 Flash is cheaper at $9.00 per million output tokens against $50.00 for Claude Fable 5 - about 5.6x.
- When were Claude Fable 5 and Gemini 3.5 Flash released?
- Claude Fable 5 was released 9 Jun 2026 by Anthropic. Gemini 3.5 Flash was released 19 May 2026 by Google (Alphabet Inc.).
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