Claude Opus 4.8 Support Update

·2026.05.29 08:54

Key point

The llm-anthropic 0.25.1 update adds support for the Claude Opus 4.8 model.

llm-anthropic, a library that helps use Anthropic models in a CLI environment, has been updated to version 0.25.1.

The key changes are as follows:

Support for the Claude Opus 4.8 (claude-opus-4.8) model
Added -o fast 1 option for accounts with Fast mode enabled
The default max_tokens setting per model changed from the existing 8,192 to that model's maximum output value

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