Where does the bug appear (feature/product)? Cursor IDE Describe the Bug My Cursor agent has been broken all day. I am not using any Cursor extensions. The issue presents in two distinct ways: Agent hangs on “Thinking” — I give the agent a prompt, it starts normally (thinking, reading files, etc.)…

The bug report submission would permit only one attached image, so below is another. I can also provide the .md of the chat transcript, but the forum will not accept upload. [Screenshot 2026-02-27 202536]

same - i figured auto’s tired of my bs

Same, and the initial setup to get to “thinking” costs me aorund $5 each time. Pretty expensive error for a hobbyist.

Hey, thanks for the report. This is a known bug with Auto mode. The team is already tracking a few similar reports. As a workaround, try switching from Auto to a specific model, like Composer 1.5 or GPT-5.2. It looks like the issue is tied to Auto routing, so picking a specific model should bypass…

Hey Dean, unfortunately I’ve directly selected Opus 4.6 and this issue is popping up.

Dean, correct me if I’m wrong, but doesn’t selecting a specific model use API credits while Auto does not? I still have Auto credit available on my plan but I’m out of API credits.

@MTARK - got it, that’s helpful. Can you share the Request ID from one of those Opus 4.6 sessions? (Chat menu in the top right > Copy Request ID.) That’ll help us investigate further. @bunst - you’re right. Auto and specific models use different usage pools. Auto has its own separate quota, and pic…

[image] MTARK: Hey Dean, unfortunately I’ve directly selected Opus 4.6 and this issue is popping up. If you can share a Request ID of a case like that (and a screenshot of the issue) that would be great! Having Opus affected is unexpected based on our investigation so far.

Same problem, currently using Opus 4.6, not Auto

getting the exact same issue with auto – starting new chats help in the short term but it sometimes goes back stuck on thinking and “begin_of_sentence” after a couple exchanges

Agent Gets Stuck on "Thinking" — Outputs Repeated begin_of_sentence | >%< Tokens

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Colin (Colin) Split this topic March 1, 2026, 1:37am 17

2 posts were split to a new topic: Agent execution timeout error in Cursor

Topic		Replies	Views
Chat Stuck on Thinking Bug Reports chat	3	34	March 17, 2026
Auto mode shows garbled multilingual thinking text and loops infinitely Bug Reports chat , auto-mode	2	72	March 17, 2026
Issue: Model output corrupted / no first token received Bug Reports chat	3	21	March 17, 2026
Infinite thinking in Auto mode Bug Reports auto-mode	1	28	April 12, 2026
Cursor spinner / “Taking longer than expected…” state hangs forever during file-write/edit operation Bug Reports performance , openai	16	1528	April 8, 2026

Agent Gets Stuck on "Thinking" — Outputs Repeated begin_of_sentence | >%< Tokens

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