Claude Fable 5
Rank of 27112from #9
Known for
Long, complex agentic tasks, where the longer the job the wider its lead.
The first Fable, and the model that put Anthropic's top tier on sale at $10 a million tokens. Superseded by Fable 5.1 in September, still served, and still near the top of every table it sits in.
What it does7
- 1M-token context, 128K output
- Adaptive thinking up to max effort
- Safety classifiers can decline a request and fall back to Opus 4.8
- A refusal returns as a normal response with a fallbacks option
- Reads dense scientific charts and figures
- Persistent memory across long sessions
- Legacy status, retirement not before June 2027
From Claude Fable 5’s own site. Not used for ranking.
58index score · LLMs
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