Prepare for Haiku 5.5 in the model selector
Anthropic's October 15 notice says Haiku 4.5 leaves the Free, Pro and Max model selector on October 29. Existing conversations continue on Haiku 5.5; API, Claude Code, Team and Enterprise are unaffected.
Source checked October 17, 2026
EDITORIAL TAKEAWAY
Try a familiar task with Haiku 5.5 before October 29. Compare its answers with your current workflow before continuing older chats.
Before you try it
- Announced October 15: Haiku 4.5 leaves the model selector on October 29, 2026 for Free, Pro and Max in chat, Cowork and Design, including desktop and mobile.
- Existing conversations stay in your account. Continuing a Haiku 4.5 chat after October 29 uses Haiku 5.5.
- The change does not affect the API, Claude Code, Team or Enterprise.
- Haiku 5.5 was introduced October 7 for tasks such as summaries, classification and quick lookups, with adjustable effort settings and availability through Claude Platform and major cloud providers.
A small next step
Our suggested way to explore the change.
- Choose a repeatable task such as classifying a short message.
- Try it with Haiku 5.5 before October 29.
- Compare the result, then check the selected model when continuing an older chat.
Go to the source
Anthropic · Haiku 4.5 model selector notice ↗Anthropic · Introducing Claude Haiku 5.5 ↗Availability can change. Check the maker's current requirements before making a decision.