# Conductor 0.64.0: Claude Fable 5

> Source: <https://www.conductor.build/changelog/0.64.0-claude-fable-5>
> Published: 2026-06-09 00:00:00+00:00

0.64.0

June 9, 2026# Claude Fable 5

### Claude Fable 5

Claude Fable 5, Anthropic's newest and most powerful model, is now available in Conductor.

Give it a shot and let us know what you think!

### Improvements

- Added env file settings for loading agent environment variables from parsed env files at user, repository, and local repository scopes. Loaded variables appear in the environment variable list with env-file source indicators.

### Fixes

- Fixed an issue where reloading Conductor on a workspace page could show a blank screen.

#### New in 0.64.1

- Fixed model picker row highlighting so only the selected model is marked as selected.
- Fixed wheel scrolling in the dispatcher model picker.

#### New in 0.64.3

- Fixed Claude Fable 5 sessions showing a 200k context window instead of 1M.
- Added Ultracode effort to Claude Fable 5