Describe the Bug Despite selecting and interacting with the Claude 4 Sonnet model, the replies are being generated by Claude 3.5 Sonnet, as clearly confirmed by the model’s own self-identification in the session. Steps to Reproduce Two screenshots are attached showing: Model self-disclosure: The m…

Claude 4 Sonnet UI Mislabeling or Misrouting to Claude 3.5 Sonnet

deanrie June 24, 2025, 4:48am 6

I just checked this in the Anthropic console and got these responses.

Could it be Claude 3.5 instead of Claude 4?

MAX Opus 4.1 is using Sonnet 3.5 under the hood?

Billing Issue: Claude 4 Sonnet charging but using Claude 3.5 Sonnet

Cursor using wrong model than selected!?

What the hell? Cursor fake model

WTH, Bad Cursor! Wrong Model is Provided

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