Claude Fable 5.2 now available on AI Gateway

Anthropic's Claude Fable 5.2 is now available on AI Gateway, with improvements in coding, reasoning, and vision, and the ability to run long, ambiguous tasks unattended or act as an orchestrator or advisor to other Claude models. It has cybersecurity and biology safety classifiers enabled and requires data retention, with prompts and completions retained for 30 days and not used to train Claude; teams with Zero Data Retention enabled receive an error. It is callable via the AI SDK, Chat Completions, Responses, and Anthropic Messages APIs, or a coding agent, using the model name anthropic/claude-fable-5.2, and model fallbacks can keep requests served when a classifier declines them.