Opus 4.6 fast mode not accessible via ACP

Paul
Fri, 24 Apr 2026 14:21:02 +0000
Bug Reports

Where does the bug appear (feature/product)?

Cursor CLI

Describe the Bug

When running the CLI in ACP mode, Opus 4.6 fast mode isn’t listed.

Steps to Reproduce

Run agent models , you’ll see that Opus 4.6 fast mode is present

Run agent acp and you’ll see that Opus 4.6 fast mode is NOT present

Since the ACP thing is a bit tricky to test, I created a repro script here: GitHub - rohitpaulk/cursor-acp-models-repro · GitHub.

Expected Behavior

Expected that Opus 4.6 fast mode is present in ACP mode too.

Screenshots / Screen Recordings

Operating System

MacOS

Version Information

About Cursor CLI

CLI Version 2026.04.17-787b533
Model Opus 4.6 1M Thinking Fast
Subscription Tier Team
OS darwin (arm64)
Terminal zed
Shell zsh

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

4 posts - 3 participants