Anthropic released Claude Opus 5.5 with a 1M-token context window

The model reaches the Claude API, Amazon Bedrock, Google Cloud, Microsoft Foundry and Claude Platform on AWS. Anthropic says it is also raising five-hour usage limits on Pro, Max, Team and seat-based Enterprise plans.

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Check our sources · 9 facts from 2 sources

The Claude Opus 5.5 launch artwork: the model name set over a horizon gradient with textured sand and coral panels at the edges. — source · The company's own image of its product, used to report on it

Anthropic released Claude Opus 5.5 on September 22, 2026, priced at $4 per million input tokens and $20 per million output tokens, with a 1M-token context window and 128K-token max output.

The model is available on the Claude API, Amazon Bedrock, Google Cloud, Microsoft Foundry, and Claude Platform on AWS, and Anthropic says it is raising five-hour usage limits on the Pro, Max, Team, and seat-based Enterprise plans alongside the release.

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Check our sources

Every sentence above is checked against these 2 sources.

1 https://www.anthropic.com/claude-opus-5-52 facts

Open the source

Anthropic released Claude Opus 5.5 on September 22, 2026

September 22, 2026
Anthropic says it is raising five-hour usage limits on the Pro, Max, Team, and seat-based Enterprise plans alongside Claude Opus 5.5
Toned down to what the source says
In addition to the price drop, we’re increasing five-hour usage limits on Pro, Max, Team, and seat-based Enterprise plans.

2 https://platform.claude.com/docs/en/models/opus-5-5/overview7 facts

Open the source

The model id for Claude Opus 5.5 is claude-opus-5-5

Model ID: claude-opus-5-5
Claude Opus 5.5 has a 1M token context window

Context window: 1M tokens
Claude Opus 5.5 has a max output of 128K tokens

Max output: 128K tokens
Claude Opus 5.5 input pricing is $4 per million tokens
Toned down to what the source says
Input pricing: $4 / MTok
Claude Opus 5.5 output pricing is $20 per million tokens
Toned down to what the source says
Output pricing: $20 / MTok
Claude Opus 5.5 is available on the Claude API, Amazon Bedrock, Google Cloud, Microsoft Foundry, and Claude Platform on AWS

Claude API, Amazon Bedrock, Google Cloud, Microsoft Foundry, Claude Platform on AWS
The Claude Opus 5.5 model page lists its retirement as not sooner than September 22, 2027
Toned down to what the source says
Not sooner than September 22, 2027

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