Claude Opus 5.5
Anthropic's most capable everyday Claude model, released September 22, 2026, at a lower price than Opus 5.
- Made by
- Anthropic
- Released
- Type
- Flagship
- Status
- Live
- How to get it
- Claude apps (paid plans) and the Claude API
- Good for
- Complex reasoningCoding agentsLong documents
What it is
Opus is the top tier of Anthropic’s Claude family. Opus 5.5 arrived on September 22, 2026, with a 1 million token context window and up to 128K tokens of output.
What it costs
$4 per million input tokens and $20 per million output tokens in the API, down from $5 / $25 for Opus 5.
What it means for you
If you use Claude for long documents, research or coding agents such as Claude Code, Opus 5.5 is the model to pick when quality matters most.
Use cases this model is good for
How to summarize a long PDF or contract with AI (without missing the important parts)
You have a 60-page report or contract and need the key points, numbers and risks today, without reading every page.
Best pick: ClaudeUp to 2h savedHow to automate a boring computer task with an AI-written script (no coding experience needed)
You do the same file-renaming or copy-paste job every week and suspect a small script could do it for you.
Best pick: ClaudeHours saved
