Claude Opus 5.5: specs, pricing and how it performs in a council

Claude Opus 5.5 is Anthropic's model available on Council AI at $4.00 per million input tokens and $20.00 per million output, with a 1,000,000-token context window. Anthropic's Opus 5.5 (released Sep 22, 2026). Succeeds Opus 5 for demanding reasoning, coding and long-horizon agentic work, at a lower $4/$20. 1M context. Adaptive thinking only; no sampling params. On Council you do not run it alone: the same prompt goes to up to 10 models from different labs in parallel, and a moderator synthesizes one answer with a consensus score showing where the labs agreed.

Claude Opus 5.5 specifications

What Claude Opus 5.5 is good at

Anthropic's Opus 5.5 (released Sep 22, 2026). Succeeds Opus 5 for demanding reasoning, coding and long-horizon agentic work, at a lower $4/$20. 1M context. Adaptive thinking only; no sampling params.

Council surfaces it for: coding, agents, complex, research.

It has native web search, so it can ground answers in current sources rather than training data alone.

Claude Opus 5.5 pricing on Council AI

Council does not resell tokens. Every paid plan carries a monthly budget and each model draws against it at cost: $4.00 in / $20.00 out per million tokens for Claude Opus 5.5. Plans start at $19.99/mo (Plus), $39.99/mo (Pro) and $99.99/mo (Ultra, which adds media review, the personal RAG library and MCP server).

If budget is the binding constraint, GPT-6.1 Sol is the cheaper seat in the lineup at $2.00/$10.00.

Using Claude Opus 5.5 in a council

A single model — this one included — can be confidently wrong. Council runs Claude Opus 5.5 alongside models from other labs on the same prompt, then scores how much they agreed. High consensus is a signal you can act on the answer; low consensus surfaces the specific point they split on, which is usually the part worth checking yourself.

Other Anthropic models in the lineup: Claude Fable 5.1, Claude Sonnet 5.5, Claude Haiku 5.5.

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