Model record
Claude Fable 5 model overview
Claude Fable 5 is a api + app model from Anthropic. It was released on June 9, 2026. Its strongest case is long-running autonomous work, while buyers should account for premium token pricing.
Claude Fable 5 benchmark snapshot
| Evaluation | Reported score | What it probes |
|---|---|---|
| MMLU-Pro | Not reported | Broad knowledge and multi-step reasoning |
| GPQA Diamond | 92.6 | Graduate-level science reasoning |
| SWE-bench Verified | Not reported | Verified real-repository issue resolution |
| LiveCodeBench | Not reported | Contamination-aware competitive programming |
| SWE-Bench Pro | 80 | Longer, harder professional software tasks |
| Artificial Analysis Intelligence Index | 59.9 | Composite third-party capability index; version matters |
Scores are percentages reported by model creators or benchmark maintainers under varying settings. A blank is preferable to an inferred result. See our methodology.
Claude Fable 5 strengths
- Long-running autonomous work
- Strong coding and knowledge-work positioning
- Million-token context window
Claude Fable 5 limitations
- Premium token pricing
- Some sensitive-domain queries may route to another model
Editorial take: Benchmark rank should narrow a shortlist, not close a purchase. Run a private evaluation with representative prompts, failure cases, latency targets, and total token costs.
Compare Claude Fable 5
- Claude Fable 5 vs GPT-5.6 Sol — review fit, trade-offs, listed prices, and an evaluation plan.
Source record
Specifications and scores are linked to the best source located during review. Provider-reported results are not presented as third-party lab reproductions.
Source limitation: Cross-model benchmark values shown here are those reported in OpenAI's GPT-5.6 launch table; consult original evaluator settings.
Read Anthropic Claude Fable product page ↗