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v1.4.455

cloudflare/agentsv1.4.455Jun 9, 2026by github-actions[bot]

AI Summary

Fabric v1.4.455 adds support for the Claude Fable model, improves provider model discovery caching, and enhances rate limit error handling.

Key Highlights

  • Added Claude Fable 5 model support
  • Added persistent cache for provider model discovery
  • Serves stale model caches during discovery failures
  • Improved rate limit error handling with localized messages

New Features

  • Claude Fable 5 support
  • Provider caching
  • Rate limit handling

Full Release Notes

## Changes

### PR [#2138](https://github.com/danielmiessler/Fabric/pull/2138) by [ksylvan](https://github.com/ksylvan): New Claude Fable model + cache OpenAI model discovery and handle provider rate limits

- Add persistent cache for provider model discovery results, improving performance and reliability of provider integrations.
- Serve stale model caches during discovery failures, ensuring continued operation when upstream providers are unavailable.
- Add Claude Fable 5 Anthropic model support, with sampling parameters automatically omitted for compatibility.
- Return concise localized errors for rate-limited model fetches, with updated translations across all supported locales.
- Update Go dependencies for AI provider integrations to keep upstream libraries current.