Comet Update 2026-02-18 CometAPI: Support for Claude Sonnet 4.6

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Core Features

Most Powerful All-Round Model: Claude Sonnet 4.6 delivers a world-class experience in coding and logical reasoning.

Dual-Protocol Support: Seamlessly compatible with both the OpenAI Standard Format and the Anthropic Native Format.

Call Parameters

Model Names: claude-sonnet-4-6, cometapi-sonnet-4-6

Developer Documentation

Quick Integration Guide (OpenAI Format)

Native Messages Reference