AIImportance: Medium

Cursor update disrupts Claude Code, Codex, and model use

r/cursorJul 6, 2026 · 6d ago

After a recent Cursor update, some setups stopped keeping Claude Code fixed in the , and the Codex extension no longer opened. A history button that previously helped reopen older Claude Code conversations also disappeared from its usual place, making past project discussions harder to find. Around the same time, Cursor showed repeated “” connection errors, slower responses, and weaker reasoning quality for some people.

The interface changes also created friction for teams that still rely on their regular IDE view, because they have to switch back, find the project again, and regain context each time. Usage tracking looked confusing too. GLM 5.2, chosen as a cheaper model, appeared to consume 9% of a after only four prompts, while another Pro Plus account saw its usage suddenly drop from 94% to 0%.

was still seen as fast and cost-effective, but its answer structure felt hard to read, and Fable 5 triggered connection errors when selected.

Key points

  • The Cursor update made Claude Code harder to keep in the for some setups.
  • The Codex extension failed to open, and older Claude Code became harder to find.
  • Connection errors, slow responses, weaker reasoning, and Fable 5 failures appeared around the same period.
  • Model usage and numbers looked inconsistent for some accounts.
  • Do not rely only on Cursor for important project decisions or prompts.

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