Anthropic releases Claude Haiku 5.5 as new standard API model
AI company Anthropic has released Claude Haiku 5.5, which replaces Haiku 4.5 and becomes the new standard model in the company's API.
What happened?
AI company Anthropic launched the new language model Claude Haiku 5.5 on 7 October 2026 UTC. The new model replaces the previous version, Haiku 4.5, and has been set as the standard model in the company's API. It is the third model in the Claude 5.5 family to be launched in a short period.
Key facts
| Lanseringsdatum | 7 oktober 2026 UTC |
|---|---|
| Ersatt modell | Claude Haiku 4.5 |
| API-status | Ny standardmodell |
Why it matters
The launch is part of Anthropic's strategy to continuously improve its faster and more cost-effective models. By making Haiku 5.5 the new standard in the API, developers gain access to higher performance without needing to change their code. The launch also comes at a time when Anthropic is broadening its product portfolio ahead of a planned IPO.
Who is affected?
The update primarily affects developers and companies using the Anthropic API to build AI services. Existing applications that rely on the default setting in the API will be updated to the new Haiku 5.5 model.
Impact on the EU
The model was released globally and is available to developers in the EU via the Anthropic API. No specific EU-related restrictions have been communicated at the time of launch.
What else you should know
Anthropic continues to rapidly expand the Claude 5.5 family in the lead-up to its planned IPO. Alongside the rollout of Haiku 5.5, version 2.1.293 of Claude Code was also released on GitHub.
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