Create Custom Review Agents with Claude Fable 5.2 on Entire

Claude Fable 5.2 is now available on Entire for creating custom review agents within Trails, a pull-request alternative centered on confidence evaluations. Trails allow teams to define requirements for code changes and use configurable agents to assess criteria such as code quality, security issues, and drift on every push. Anthropic reports that Fable 5.2 offers improved coding and reasoning performance, with its High effort setting performing approximately on par with Opus 5.5 at Max effort while costing about half as much per task. The model’s API pricing is $8 per million input tokens and $40 per million output tokens, representing a 20% reduction from Fable 5.1, and it can be selected through Entire’s web interface or configured from a coding agent.

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