Claude Fable 5

Anthropic released a model for long-running coding and knowledge-work tasks designed around hours or days of agentic work rather than a single answer.

Fable 5 matters less as a new peak on short tests than as a change in the unit of work: it was designed for sustained processes involving tools, files and intermediate verification. Anthropic temporarily restricted the model after launch and later restored global access, underlining that longer autonomy requires dependable safeguards as well as capability.

Sources

Anthropic · запускOpen primary source Anthropic · карточка моделиOpen primary source Anthropic · повторный запускOpen primary source