Language modelAnnounced
Claude Haiku 5.5
Anthropic
- Released
- -
- Data date
- October 3, 2026
Claude Haiku 5.5 is intended for high-volume and cost-sensitive applications within Anthropic’s 5.5 family. Anthropic announced it alongside Sonnet 5.5 on September 28, 2026, for the coming weeks. The announcement does not yet specify context limits or access routes.
Sources and data date
Every statement links to its underlying documentation or leaderboard.
| Type | Evidence and data date |
|---|---|
| Research status | Research date October 4, 2026. 2 source URLs checked. This documents the inspected sources, not an exhaustive inventory of every publication. |
| Not published | benchmark-results Original wording Haiku 5.5 remains announced/preview-only in the checked primary source, so releaseDate and benchmark fields stay open. Sonnet 5.5 tables (Terminal-Bench 4, FrontierCode, CursorBench, GDPval-AA, AA-Briefcase, HLE, OSWorld and Chartography) are different checkpoints and were not transferred. |
| Additional source | Anthropic Claude Sonnet 5.5 announcement (retrieved October 3, 2026; October 4, 2026) · Anthropic Claude Sonnet 5.5 announcement · Editorial description reviewed October 4, 2026 |