Claude 5 Fable
Anthropic's most intelligent model, setting new standards in agentic coding, complex reasoning, and professional knowledge work.
Anthropic Claude 5 Fable
Claude Opus 4.8 is Anthropic's most capable generally available model to date. It is highly autonomous and performs exceptionally well on long-horizon agentic work, knowledge work, vision tasks, and memory tasks.
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Parameters & options
Controls reasoning depth. Higher effort improves quality but uses more tokens and is slower. Recommended: High for most tasks, Extra High or Max for the hardest coding and agentic work, Medium or Low for routine, latency-sensitive tasks.
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