# Claude Sonnet 4.0 telling me it was actually Sonnet 3.5 (?)

**URL:** <https://forum.cursor.com/t/claude-sonnet-4-0-telling-me-it-was-actually-sonnet-3-5/126546>\
**Category:** Help\
**Created:** [August 7, 2025, 12:49am UTC](https://forum.cursor.com/t/claude-sonnet-4-0-telling-me-it-was-actually-sonnet-3-5/126546 "2025-08-07T00:49:32Z")\
**Posts on this page:** 1\
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**Author:** ![asim1801](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/asim1801/32/37822_2.png) [@asim1801](https://forum.cursor.com/u/asim1801)\
**Post date:** [August 7, 2025, 6:15pm UTC](https://forum.cursor.com/t/claude-sonnet-4-0-telling-me-it-was-actually-sonnet-3-5/126546/4 "2025-08-07T18:15:29Z")

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![image](https://us1.discourse-cdn.com/cursor1/original/3X/8/4/849f365f484db864ee44525095f5c058aceea0c1.png)

> [@Claude 4 is reporting as Claude 3.5](https://forum.cursor.com/t/claude-4-is-reporting-as-claude-3-5/95719/8):
>
> Models are never aware of themselves as the data they are trained on doesn’t mention them - a bit of a catch-22! “Claude 4” is not a concept on the internet when they train the model, so it’s not aware of it’s own existence, and therefore falls back to saying it is Claude 3.5, as that is a model it is aware of from it’s training data. Rules may fix this, but it’s likely not worth adding a rule just to get it to state it’s real name - you are always talking to the model you pick in Cursor!

Hopefully that answers your concern

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