›_ Claude Code Issues
Claude Code Issues / #9596

[BUG] Haiku 4.5 does not appear in model selector

Resolved 💬 16 comments Opened Oct 15, 2025 by darylrobbins Closed Oct 17, 2025

Preflight Checklist

  • [x] I have searched existing issues and this hasn't been reported yet
  • [x] This is a single bug report (please file separate reports for different bugs)
  • [x] I am using the latest version of Claude Code

What's Wrong?

I upgraded to Claude Code v2.0.17, which is supposed to add Haiku 4.5 to the model selector. However, I only see Sonnet 4.5. Is Haiku 4.5 only available on Max plans?

What Should Happen?

Haiku 4.5 should appear in model selector

Error Messages/Logs

Select model
 Switch between Claude models. Applies to this session and future Claude Code sessions. For other/previous model names, specify with --model.

 ❯ 1. Sonnet   Sonnet 4.5 · Smartest model for daily use · $3/$15 per Mtok ✔

 Want Opus 4.1? Run /upgrade to upgrade to Max

 Enter to confirm · Esc to exit

Steps to Reproduce

  1. Invoke /model
  2. Observe list of models

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.0.17

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_

View original on GitHub ↗

16 Comments

markus1189 · 9 months ago

Same here, however /model haiku works and uses haiku 4.5

darylrobbins · 9 months ago

Yes /model haiku works for me too but it shows up as a custom model.

Redster1 · 9 months ago

I'm on Linux (NixOS) and haiku did not show up, however, /model haiku works for me as well, but shows up in the model selector as a custom model.

mike-hai-ts · 9 months ago

/model haiku for me resolves to haiku 3.5 and /model claude-4-5-haiku-20251015
⎿  Model 'claude-4-5-haiku-20251015' not found is self explanatory

Redster1 · 9 months ago
/model haiku for me resolves to haiku 3.5 and /model claude-4-5-haiku-20251015 ⎿ Model 'claude-4-5-haiku-20251015' not found is self explanatory

haiku's name seems to be: (claude-haiku-4-5-20251001)

mike-hai-ts · 9 months ago
(claude-haiku-4-5-20251001)

/model (claude-haiku-4-5-20251001)
⎿  Model '(claude-haiku-4-5-20251001)' not found

/model claude-haiku-4-5-20251001
⎿  Set model to claude-haiku-4-5-20251001

darylrobbins · 9 months ago

Same behavior in v2.0.19

Kanute3 · 9 months ago

Same problem. Not available in model selector.

Redster1 · 9 months ago

This morning, when I opened claude-code, it said that the model I was using was Haiku 3.5 for the welcome message. When I select sonnet 4.5 in the model selector and switch back to "haiku custom model", it always resolves to Haiku 3.5. However, when I run /model claude-haiku-4-5-20251001, this does resolve correctly.

ChrisMcSomething · 9 months ago

The Claude 4.5 Haiku model is not available in the VS Studio Code extension but can be manually forced using the --model claude-haiku-4-5-20251001 start flag in the terminal version (but it's not selectable by default via model selector). Adding to VS Studio code would be helpful as well.

remidej · 9 months ago

Since setting /model haiku makes it show up as a custom model, will it use Sonnet for planning?

solrevdev · 9 months ago

I'm using the latest version:

`claude --version
2.0.20 (Claude Code)
```` 
and Haiku is not available at all via my pro subscription account.  

I logged out and in again no joy. 

I tried the `/model haiku` suggestion and that seemed to work for a few minutes but then I got the error:

`API Error: Claude's response exceeded the 8192 output token maximum. To configure this behavior, set the CLAUDE_CODE_MAX_OUTPUT_TOKENS environment variable.` 

So I've reverted back to the Sonnet 4.5 option. 

I did `/logout` and `/login` again via the API option and it was available and worked but I want to use my subscription so I logged out and back in via my account and chose the only Sonnet 4.5 option available to me.

Using macOS 26. Happy to share anything else that may be of use if I'm pointed in the right direction

Note: I posted same comment [here](https://github.com/anthropics/claude-code/issues/9619#issuecomment-3413031060) but that ticket was marked as duplicate so not sure which of these will be closed or survive. Happy to delete the incorrect one
solrevdev · 9 months ago
I'm using the latest version: claude --version 2.0.20 (Claude Code) and Haiku is not available at all via my pro subscription account. I logged out and in again no joy. I tried the /model haiku suggestion and that seemed to work for a few minutes but then I got the error: API Error: Claude's response exceeded the 8192 output token maximum. To configure this behavior, set the CLAUDE_CODE_MAX_OUTPUT_TOKENS environment variable. So I've reverted back to the Sonnet 4.5 option. I did /logout and /login` again via the API option and it was available and worked but I want to use my subscription so I logged out and back in via my account and chose the only Sonnet 4.5 option available to me. Using macOS 26. Happy to share anything else that may be of use if I'm pointed in the right direction Note: I posted same comment here but that ticket was marked as duplicate so not sure which of these will be closed or survive. Happy to delete the incorrect one

Fixed in 2.0.21 thank you! 🙏🏼️

Redster1 · 9 months ago

Appears to be working correctly in 2.0.21 for me as well!

darylrobbins · 9 months ago

Confirmed as resolved in v2.0.21.

github-actions[bot] · 8 months ago

This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.