# Claude Opus 5.5

Anthropic



The first model in the Claude 5.5 family. API pricing is $4 for input and $20 for output per million tokens. Anthropic reports roughly 40% lower costs on typical workloads than Opus 5, not a 40% cut to every rate. Available via Claude Platform, Bedrock, Google Cloud, and Azure.


## Details

First Claude 5.5 family model; ~40% cheaper typical vs Opus 5; $4/$20 /MTok \(cache read $0.20, write $5; Opus 5 was $5/$25, cache read $0.50\); Fast mode $8/$40 up to ~2.5x speed; strong alignment audit; cyber/bio safeguards similar to Fable 5.1 \(Life Sciences / Cyber verification\); preserved thinking; Sonnet/Haiku 5.5 coming weeks

## Availability

Claude API/Platform claude-opus-5-5; Amazon Bedrock / Google Cloud / Microsoft Azure; Claude apps incl. Claude Code
- Model released: Sep 22, 2026 · Date only
- Review updated: Sep 23, 2026 08:17 Wed · Beijing Time (UTC+8)

## Sources

- Source: https://www.anthropic.com/news/claude-opus-5-5

Canonical entry: https://www.ailyre.com/source/?id=anthropic-claude-opus-5-5&lang=en