Claude models stuck at 200k context window size

Support Bug Reports
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1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

All Claude 4.6 models stuck at 200k context window size when they should be showing 1M.

Steps to Reproduce

I don’t know how to reproduce. I’m on the latest version (2.6.22). My work laptop is on an earlier version (2.5.26) and they correctly show 1M context there.

Expected Behavior

Opus 4.6 and Sonnet 4.6 need to have 1M context windows.

Screenshots / Screen Recordings

Screenshot 2026-04-01 at 9.53.53 AM.png
Screenshot 2026-04-01 at 9.53.53 AM.png279×265 7.63 KB

Operating System

MacOS

Version Information

Version: 2.6.22
VSCode Version: 1.105.1
Commit: c6285feaba0ad62603f7c22e72f0a170dc8415a0
Date: 2026-03-27T15:59:31.561Z
Build Type: Stable
Release Track: Default
Electron: 39.8.1
Chromium: 142.0.7444.265
Node.js: 22.22.1
V8: 14.2.231.22-electron.0
OS: Darwin arm64 25.2.0

For AI issues: which model did you use?

Claude 4.6, Sonnet 4.6

Does this stop you from using Cursor

No - Cursor works, but with this issue

4

In reality, you still need to enable max mode to use the 100M context.

6

Hey, that’s expected behavior. 200k is the default for Claude 4.6 models without MAX mode.

It’s important to separate two things:

  • Max model (for example, Opus 4.6 Max). This is a model variant with stronger reasoning.
  • MAX mode. This is a separate toggle in the chat input area that unlocks the 1M context window.

To get 1M context, turn on the MAX mode toggle next to the chat input field. On the Ultra plan, this should work fine.

About the difference vs your work laptop on v2.5.26, it’s most likely that MAX mode is enabled there, or the older model picker showed it differently.

Related threads with staff explanations:

Let me know if the context doesn’t switch to 1M after you enable MAX mode, and we can dig in further.