Summary

Setting anthropic/claude-opus-4-6 as the primary model results in:

Agent failed before reply: Unknown model: anthropic/claude-opus-4-6

Environment

• OpenClaw version: 2026.2.3-1
• Model: anthropic/claude-opus-4-6

Steps to Reproduce

1. Update to 2026.2.3-1
2. Set agents.defaults.model.primary to anthropic/claude-opus-4-6
3. Send a message

Expected

Model should be recognized — Anthropic launched Opus 4.6 today and the API model name is claude-opus-4-6 per their docs.

Related

• [Feature]: Support for Anthropic Opus 4.6 #9811 (closed but fix not merged?)
• feat: add Claude Opus 4.6 to built-in model catalog #9853 (PR closed without merge)
• [Feature]: Support Anthropic adaptive thinking and effort parameter for Opus 4.6 #9837 (adaptive thinking feature request)