Use adaptive thinking with Claude Opus 4.6

[suhaibmujahid]

/app/.venv/lib/python3.12/site-packages/langchain_anthropic/chat_models.py:1410: UserWarning: Using Claude with claude-opus-4-6 and 'thinking.type=enabled' is deprecated. Use 'thinking.type=adaptive' instead which results in better model performance in our testing: https://platform.claude.com/docs/en/build-with-claude/adaptive-thinking

See https://platform.claude.com/docs/en/build-with-claude/adaptive-thinking#supported-models:

thinking.type: "enabled" and budget_tokens are deprecated on Opus 4.6 and Sonnet 4.6 and will be removed in a future model release. Use thinking.type: "adaptive" with the effort parameter instead. If you are already using extended thinking with budget_tokens, it continues to work and no immediate changes are required.

Older models (Sonnet 4.5, Opus 4.5, etc.) do not support adaptive thinking and require thinking.type: "enabled" with budget_tokens.