AI Radar

Claude Haiku 5.5

Announced · Language

Claude Haiku 5.5 is a forthcoming model in Anthropic's Claude Haiku line, first named in the Claude Opus 5.5 announcement of 22 September 2026 as following within weeks. Anthropic says it is aimed at high-volume, cost-sensitive applications; on 1 October 2026 the models overview still listed Claude Haiku 4.5 as the current Haiku model. [1] [2] [3] Primary source

Timeline of Claude Haiku 5.5 →

Claims and evidence

  • Announced First named in the Claude Opus 5.5 announcement as following within weeks; no release date was given. Primary source[1]Introduction
  • ReleasedRelease date unknown
  • Status AnnouncedNamed by Anthropic as a forthcoming model; not released as of 2026-10-01. Primary source[1]Introduction [2]Introduction

        Lineage

        Predecessors

        No known predecessor.

        Successors

        No known successor.

        Based on

        Not derived from another model.

        Variants and derived

        None recorded.

        Siblings

        None recorded.

        All ancestors

        None.

        All descendants

        None.

        Variants

        No variants recorded in this record.

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