# Task still rejects composer-2.5 in the IDE, allowlist is only composer-2.5-fast **URL:** \ **Category:** Bug Reports\ **Tags:** subagents, composer\ **Created:** [September 17, 2026, 8:52am UTC](https://forum.cursor.com/t/task-still-rejects-composer-2-5-in-the-ide-allowlist-is-only-composer-2-5-fast/171976 "2026-09-17T08:52:48Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Olivier\_Berthet1](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/olivier_berthet1/32/121196_2.png) [@Olivier\_Berthet1](https://forum.cursor.com/u/Olivier_Berthet1)\ **Post date:** [September 17, 2026, 8:52am UTC](https://forum.cursor.com/t/task-still-rejects-composer-2-5-in-the-ide-allowlist-is-only-composer-2-5-fast/171976/1 "2026-09-17T08:52:48Z")
### Where does the bug appear (feature/product)? Cursor IDE ### Describe the Bug Closed Help thread 166082 already has this error from July. I hit it again today in the Cursor IDE Task tool, 17 Sep 2026, not CLI. > [@How do I spawn a non-fast composer-2.5 Task subagent? Only composer-2.5-fast is accepted](https://forum.cursor.com/t/how-do-i-spawn-a-non-fast-composer-2-5-task-subagent-only-composer-2-5-fast-is-accepted/166082): > > I’m trying to use regular Composer 2.5 (not fast) for small Task subagents, and I can’t find a way to do it. This isn’t the Cursor Desktop “Agents” UI or an Agents folder workflow. I’m in the Cursor agent/CLI flow, where the parent agent dispatches work via the Task tool (subagent\_type: generalPurpose, etc.), with an explicit model parameter. I have tried passing this to Task for the model value: composer-2.5 → rejected composer-2.5[fast=false] → rejected composer-2.5-fast → works Rejection… I set the Task model to composer-2.5. Rejected. I retried the same call unchanged. Rejected again. The allowed list returned one slug: composer-2.5-fast. A grok 4.6 model (cursor-grok-4.6-high) was accepted in the same session after I named it in chat. Please treat composer-2.5 as a valid inline Task slug, not only the fast variant. OS: Windows 10.0.26200 Cursor: 3.20.21 (f09fca384ceca23f7bf21f9c23655b162641d740) Request ID: 2227871c-3eba-43c1-ae41-7330e131ace7 Invalid model selection “composer-2.5”. Model could not be resolved to a valid subagent model. Allowed model slugs: - composer-2.5-fast Related open bug (CLI/SDK whitelist, same one-slug shape): > [@Cursor CLI: can't choose model for subagents](https://forum.cursor.com/t/cursor-cli-cant-choose-model-for-subagents/161628): > > Where does the bug appear (feature/product)? Cursor CLI Describe the Bug Can’t choose subagent model. Task tool only whitelists “composer-2.5-fast”. Steps to Reproduce Ask “what models I can use in Task tool?” or create a subagent with specified model and ask what model it is using in the prompt. Expected Behavior Should support all models Screenshots / Screen Recordings Operating System Windows 10/11 Version Information CLI Version 2026.05.24-dd… ### Steps to Reproduce I set the Task model to composer-2.5. Rejected. I retried the same call unchanged. Rejected again. The allowed list returned one slug: composer-2.5-fast. ### Expected Behavior Please treat composer-2.5 as a valid inline Task slug, not only the fast variant. ### Operating System Windows 10/11 ### Version Information 3.20.21 (f09fca384ceca23f7bf21f9c23655b162641d740) ### For AI issues: which model did you use? composer-2.5 (also cursor-grok-4.6-high accepted after named in chat) ### For AI issues: add Request ID with privacy disabled 2227871c-3eba-43c1-ae41-7330e131ace7 ### Additional Information Related CLI/SDK whitelist thread is 161628. Closed Help thread is 166082. OS: Windows 10.0.26200 ### Does this stop you from using Cursor No - Cursor works, but with this issue ---
**Author:** ![Colin](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/colin/32/90452_2.png) [@Colin](https://forum.cursor.com/u/Colin)\ **Post date:** [September 17, 2026, 11:03am UTC](https://forum.cursor.com/t/task-still-rejects-composer-2-5-in-the-ide-allowlist-is-only-composer-2-5-fast/171976/5 "2026-09-17T11:03:27Z")
Hey @Olivier_Berthet1, thanks for the detailed report and for linking the earlier thread. You’re reading the behavior right: the inline `model` list for Task mirrors your model picker with one variant per model family, and Composer 2.5 defaults to Fast, so only `composer-2.5-fast` shows up. This is a known limitation the team is tracking, and I’ve added your report to it. Two ways to get standard Composer 2.5 subagents today: 1. In the model picker, select Composer 2.5 and turn Fast off, then start a fresh chat. `composer-2.5` will then appear in the allowed list alongside `composer-2.5-fast`. 2. Define a custom subagent (for example `.cursor/agents/composer-standard.md`) with `model: composer-2.5[fast=false]` in the frontmatter and dispatch it by name. The bracket syntax is honored there, just not in the inline Task parameter.