> ## Documentation index
> Fetch the complete documentation index at: https://arize.com/llms.txt
> Ask it with GET https://arize.com/ask?q=<keywords or question>. Short keywords rank best.
> Use these to discover all available pages before exploring further.

# 08.05.2025: Claude Opus 4-1 Support

> Available in Phoenix 11.19+

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Support for Claude Opus 4-1 is now available, enabling teams to begin experimenting and evaluating with the new model from day 0.