A strong pick for developers and paid Claude users on demanding coding work, at $4/$20 per million tokens and no Free plan access.

Kenning's take

What it does

Claude Opus 5.5 is the first model in Anthropic's Claude 5.5 family, aimed at coding, research, writing and long agentic jobs. Anthropic says it performs at the level of Claude Fable 5.1 on most work, costs about 40% less to run than Opus 5 and writes output over 30% faster. It is in the Claude apps on paid plans, Claude Code and the API.

• 1 million token context window
• Text and image input
• Adjustable effort, Medium by default in the API
• Fast mode at up to 2.5x speed
• Cheaper cache reads at $0.20 per million tokens

Who it suits. Developers and paid Claude users who need a strong model for demanding coding and knowledge work.

Key facts

Category

AI models

Part of

Claude

Made by

Anthropic

Based in

United States

Released

22 September 2026

How to get it

in the Claude apps on Pro, Max, Team and Enterprise plans, in Claude Code, and in the API as claude-opus-5-5

Works on

Web, iOS, Android, macOS, Windows, API

In the UK

Yes

API price

$4 per million input tokens, $20 per million output tokens; cache reads $0.20; fast mode $8/$40

FAQ

Facts from the maker's own pages and the sources listed. Checked 2026-10-11.