# LLM.txt - Haiku 4.5 Left Claude’s Model Menu: What Users and Developers Should Do ## Article Metadata - **Title**: Haiku 4.5 Left Claude’s Model Menu: What Users and Developers Should Do - **URL**: https://www.llmrumors.com/news/claude-haiku-45-removal-haiku-55-options - **Publication Date**: October 31, 2026 - **Reading Time**: 7 min read - **Tags**: Anthropic, Claude, Haiku 4.5, Haiku 5.5, AI Models, Claude Code, Claude API, Model Migration - **Slug**: claude-haiku-45-removal-haiku-55-options ## Summary Anthropic removed Haiku 4.5 from Free, Pro and Max chat menus on October 29. Existing conversations continue on Haiku 5.5, while Claude Code and API users still have a choice. ## Key Topics - Anthropic - Claude - Haiku 4.5 - Haiku 5.5 - AI Models - Claude Code - Claude API - Model Migration ## Content Structure This article from LLM Rumors covers: - Financial analysis and cost breakdown - Comprehensive source documentation and references ## Full Content Preview TL;DR: On October 29, Anthropic removed Haiku 4.5 from the model selector in chat, Cowork and Design for Free, Pro and Max users; existing chats stay, but their next response uses Haiku 5.5.^[1] Claude Code, Team and Enterprise plans, and the Claude Platform API retain Haiku 4.5 access. Haiku 5.5 launched on October 7, so this is a product-menu change, not a new model launch.^[1]^[2] If Haiku 4.5 vanished from your Claude menu, the model itself has not vanished. Anthropic announced the change on October 15 and put it into effect on October 29 for chat, Cowork and Design on Free, Pro and Max, including Desktop and Mobile.^[1] An individual choosing a model in chat now gets Haiku 5.5. Developers can still call Haiku 4.5 through the API; Anthropic lists its API ID as active.^[1]^[8] Treating a menu removal as an API shutdown would trigger a rushed migration for the wrong reason. October 29 changed model selection and the behavior of continued chats for affected individual plans. October 7 was the Haiku 5.5 launch. Users need to check the surface they actually use before changing a workflow or an application.^[1]^[2] Cover: generated editorial illustration of separate access routes. It represents product choices, not a Claude interface screenshot. The Scope: A Menu Removal, Not a Model Retirement Anthropic says Haiku 4.5 no longer appears under “More models” for affected Free, Pro and Max experiences. If it was selected, Claude switches the selection to Haiku 5.5. Team and Enterprise plans, Claude Code and the Claude Platform API are explicitly outside this removal.^[1] A Team or Enterprise administrator can still control which models members see, so organization policy may narrow the options in a particular account.^[5] | Where you work | Haiku 4.5 after October 29 | Practical move | | --- | --- | --- | | Free, Pro or Max chat, Cowork or Design | Removed from the selector; Haiku 5.5 replaces it^[1] | Check the model name before sending a sensitive or repeatable task. | | Existing Haiku 4.5 chat on those plans | Chat remains; its next answer uses Haiku 5.5^[1] | Preserve a copy if the historical record matters; compare new output under the new model. | | Claude Code | Haiku 4.5 remains available under this change^[1] | Use /model or session configuration to select deliberately.^[7] | | Team or Enterprise | Haiku 4.5 remains available under this change^[1] | Ask an admin if a permitted model is absent from your menu.^[5] | | Claude Platform API | Haiku 4.5 remains active^[8] | Keep the current ID if it still meets requirements; test before changing it. | The real story isn't model extinction. Anthropic is setting a new consumer default while keeping an older-model path for organizations and developers. That changes what a continued chat means. Existing Chats: The Transcript Stays, the Next Answer Changes Anthropic says Haiku 4.5 chats have not been deleted. Continue one after October 29 on an affected plan and the next response comes from Haiku 5.5. You can change models at any point in a chat, with the change applying from the next response; the model control sits next to the send button.^[1]^[5] For a repeated workflow, record the date, selected model and a representative output before judging whether behavior changed. A preserved transcript is not a frozen execution environment. Individual Free, Pro and Max users ca... [Content continues - full article available at source URL] ## Citation Format **APA Style**: LLM Rumors. (2026). Haiku 4.5 Left Claude’s Model Menu: What Users and Developers Should Do. Retrieved from https://www.llmrumors.com/news/claude-haiku-45-removal-haiku-55-options **Chicago Style**: LLM Rumors. "Haiku 4.5 Left Claude’s Model Menu: What Users and Developers Should Do." Accessed October 31, 2026. https://www.llmrumors.com/news/claude-haiku-45-removal-haiku-55-options. ## Machine-Readable Tags #LLMRumors #AI #Technology #Anthropic #Claude #Haiku4.5 #Haiku5.5 #AIModels #ClaudeCode #ClaudeAPI #ModelMigration ## Content Analysis - **Word Count**: ~1,366 - **Article Type**: News Analysis - **Source Reliability**: High (Original Reporting) - **Technical Depth**: High - **Target Audience**: AI Professionals, Researchers, Industry Observers ## Related Context This article is part of LLM Rumors' coverage of AI industry developments, focusing on data practices, legal implications, and technological advances in large language models. --- Generated automatically for LLM consumption Last updated: 2026-10-31T03:43:18.324Z Source: LLM Rumors (https://www.llmrumors.com/news/claude-haiku-45-removal-haiku-55-options)