Claude Fable 5.2 now available on AI Gateway

What happened

Anthropic has launched Claude Fable 5.2 on AI Gateway. The new model is designed for technical tasks and improves coding, reasoning, and vision abilities compared to earlier versions. It can manage complex, lengthy tasks and works with other models for task delegation. The release includes new safety features and specific data retention requirements for users.

Key details

• Claude Fable 5.2 includes cybersecurity and biology safety classifiers.
• The model retains prompts and completions for 30 days and does not support Zero Data Retention.
• If Zero Data Retention is enabled, requests to Fable 5.2 are blocked and return an error.
• Fallback options allow requests declined by the cybersecurity classifier to be sent to other models like Opus 5.5 or Sonnet 5.5.
• Claude Fable 5.2 can be accessed through multiple APIs and coding tools, including Claude Code, Codex, and Cursor.

Why it matters

Teams using AI Gateway now have access to a model with enhanced technical capabilities and faster output, but must comply with Anthropic's data retention policy. Organizations that require Zero Data Retention cannot use Claude Fable 5.2, which may affect those with strict data privacy requirements. The addition of safety classifiers and fallback mechanisms provides more control and reliability for users managing sensitive or complex tasks.