BlueFish AIAQI AI Intelligence
⌕
Official documentationNot tested by BlueFish

Claude Opus 5.5 fast mode is generally available

Opus 5.5 fast mode no longer requires preview access or a beta header; fast mode for Opus 5 and 4.8 remains preview.

Last checked:
A quick glossary

Models generate and reason. Agents use tools to work on tasks. A harness manages an agent’s environment. MCP connects tools and data. Skills are reusable task guidance.

Original sources

  1. Claude · Changelog ↗

    platform.claude.com · 2026-10-16 · Official documentation

Connected resources

API providerUsage billing; see current official prices

Anthropic Claude API

Official Anthropic Claude API documenting Claude Sonnet 5.5 and Opus 5.5.

Official documentation