How can I use opus 4.6 with Cursor ACP in IntelliJ IDEA?

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1

Hi,

I’ve set up Cursor ACP in IntelliJ IDEA and got all the models shown in the window. It works fine with auto. It told me to add a payment method when I’m using Opus 4.6.

I’ve checked my limit and payment settings, and it works fine in Cursor GUI. My limit is currently at $100 / $200.

3

Hey, thanks for the report. This is a known issue. ACP can currently handle billing incorrectly for non-auto models, which can trigger a payment method request even if everything is already set up.

The team is aware of it. For now, you can use auto as a workaround. It will automatically pick the best model.

To help with debugging, can you share:

  1. The exact error text or a screenshot of what you see when selecting Opus 4.6
  2. Your Cursor CLI version cursor-agent --version

Let me know if you have any questions.

4

I’m experiencing the same issue.

Environment:

  • IntelliJ IDEA 2026.1
  • Cursor ACP path: C:\Users\xxx\AppData\Local\JetBrains\acp-agents\cursor\2026.03.30\dist-package

Issue:
When selecting Opus 4.6 manually, I get the error: Add a payment method to continue.
However, auto mode works perfectly fine.

The issue only occurs in IntelliJ IDEA via ACP, not in the Cursor editor itself.

This might be a JetBrains-side issue?

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5

The same issue also occurs with JetBrains Air plugin.

Environment:

  • WebStorm 2026.2.3
  • Cursor ACP: v2026.10.18

Selecting non-auto models such as Opus 5.5 shows “Add a payment method to continue”. Billing is already set up, and it works fine in the Cursor editor itself. Switching to auto makes it work normally.

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