> ## Documentation Index
> Fetch the complete documentation index at: https://arizeai-433a7140-claude-release-notes-2026-07-29.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# 11.12.2025: Updated Anthropic Model List

> Available in Phoenix 12.15+

This update enhances the Anthropic model registrations in Arize Phoenix by adding support for the **4.5 Sonnet/Haiku variants** and removing several legacy **3.x Sonnet/Opus entries.**

<Card title="Pull Request #10255" href="https://github.com/Arize-ai/phoenix/pull/10255" icon="github" horizontal>
  GitHub
</Card>


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