Attempting to use Claude Sonnet 4.5 gives "Bad Request". Recent usage shows Haiku being used.

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Description

I signed up for Zen, put my api key into opencode and then selected Claude Sonnet 4.5 and tried to do /init in a dir and it gave me a Bad Request message

OpenCode version

v1.0.10

Steps to reproduce

I had just installed opencode, did the auth command, put in my api key. I then opened the app in the directory I wanted, typed /init

Screenshot and/or share link

Operating System

Ubuntu 24.04

Terminal

Warp (with all warp AI disabled)

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• Unable to login with zen provider. #3335: Unable to login with zen provider - Similar Zen authentication issues that could cause Bad Request errors
• Claude Sonnet 4.5 Throws "text content block must contain non-whitespace text" #3375: Claude Sonnet 4.5 throws 'text content block must contain non-whitespace text' - Specific Claude Sonnet 4.5 errors
• opencode zen models tool calls are not parsed correctly mid conversation #3561: OpenCode Zen models tool calls are not parsed correctly mid conversation - Issues with model switching/selection via Zen (relates to Haiku being used instead of Sonnet 4.5)
• OpenTUI: /init command is missing in v1.0.x #3637: OpenTUI: /init command is missing in v1.0.x - Direct issues with /init command functionality

Feel free to ignore if none of these address your specific case.

[rekram1-node]

ill take a look

[MostHated]

I just ran the upgrade command a few minutes ago and tried again, it seems the issue was resolved in one of the recent updates.