- Added `claude-haiku-4-5-20251001` and `claude-haiku-4-5-latest` to MODEL_LIST
in anthropic.py to fix context window lookup for the newly released model
- Added prefix stripping in anthropic_client.py to handle cases where the
model name incorrectly includes the `anthropic/` provider prefix
Fixes the production error:
anthropic.NotFoundError: Error code: 404 - model: anthropic/claude-haiku-4-5-20251001
Fixes#8907🤖 Generated with [Letta Code](https://letta.com)
Co-authored-by: letta-code <248085862+letta-code@users.noreply.github.com>
Co-authored-by: datadog-official[bot] <datadog-official[bot]@users.noreply.github.com>
Co-authored-by: Kian Jones <11655409+kianjones9@users.noreply.github.com>
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