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# Claude Opus 5.5 fast mode leaves research preview
- URL: https://orbiorbi.com/news/en/hot/claude-opus-5-5-fast-mode-general-availability-en/
- Published: 2026-10-15T22:57:33.000Z
- Updated: 2026-10-15T23:01:35.000Z
- Description: According to Anthropic, Opus 5.5 fast mode no longer needs an access request or beta header. Every usage tier has a default fast mode rate limit, and Azure-hosted Microsoft Foundry deployments now support it.
- Author: Orbis News
- Tags: #orbis-hot, #en

According to Anthropic, Opus 5.5 fast mode no longer needs an access request or beta header. Every usage tier has a default fast mode rate limit, and Azure-hosted Microsoft Foundry deployments now support it.

- Fast mode for Opus 5 and Opus 4.8 remains in research preview and still requires the beta header. [\[1\]](#hot-source-1)

## Sources and originals

- \[1\] Anthropic · 2026-10-16 · [Read original](https://platform.claude.com/docs/en/release-notes/overview?ref=orbiorbi.com)  
Anthropic says Opus 5.5 fast mode no longer requires an access request or beta header.

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