fix(anthropic): set temperature = 1 for extended-thinking models

[bjoaquinc]

📝 Summary

Anthropic returns an error when extended thinking is enabled and the temperature isn’t 1. This change automatically sets the temperature to 1 for extended-thinking models and keeps the default at 0.2 for all others. It also tidies up default constants and clarifies comments.

🔍 Description of Changes

• Added DEFAULT_EXTENDED_THINKING_TEMPERATURE and DEFAULT_EXTENDED_THINKING_BUDGET_TOKENS in AnthropicProvider based on the anthropic documentation
• Added EXTENDED_THINKING_MODEL_PREFIXES based on the anthropic documentation
• Created an is_extended_thinking_model method to check if the selected model starts with any of the EXTENDED_THINKING_MODEL_PREFIXES
• Created a get_temperature which only sets temperature to DEFAULT_EXTENDED_THINKING_TEMPERATURE if is_extended_thinking_model otherwise it sets the temperature to 0.2.

📋 Checklist

• I have read the contributor guidelines.
• For large changes, or changes that affect the public API: this change was discussed or approved through an issue, on Discord, or the community discussions (Please provide a link if applicable).
• I have added tests for the changes made.
• I have run the code and verified that it works as expected.

📜 Reviewers

@mscolnick

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Name	Status	Preview	Comments	Updated (UTC)
marimo-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 4, 2025 5:46am

[mscolnick]

very clean fix! Thank you

[github-actions]

🚀 Development release published. You may be able to view the changes at https://marimo.app?v=0.13.16-dev38