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Anthropic

Claude Opus 5.5

The newest Opus, at the same price as Opus 5.

Claude Opus 5.5 is Anthropic's newest flagship for sustained coding, multi-file work, multi-agent coordination and precise code review. It costs the same here as Opus 5, so moving up a generation changes nothing on the bill.

Best for

Hardest coding tasksMulti-agent workCode review

Strengths

  • ▸Newest Opus
  • ▸Agentic coding
  • ▸Adaptive effort up to max

Use Claude Opus 5.5 via AnyModel

One OpenAI-compatible endpoint — just set the model id:

curl https://anymodel.org/v1/chat/completions \
  -H "Authorization: Bearer $ANYMODEL_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-opus-5-5",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'
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