#Getting 4.1 responses when trying to use 5.1

1 messages · Page 1 of 1 (latest)

sterile steppeBOT
#

Reported by @cloud wedge

Bug Report: Getting 4.1 responses when trying to use 5.1
`Steps to Reproduce`

i'm doing a
curl --request POST
--url https://api.openai.com/v1/responses
--header 'Content-type: application/json'
--header "Authorization: Bearer $OPENAI_API_KEY"
--data '{
"model": "gpt-5.1-2025-11-13",
"input": "What type of model were you trained on? and whats your knowledge cutoff"
}'

`Expected Result`

an answer that says is gp5.1 and a recent model knowledge cutoff

`Actual Result`

I'm getting a response that is labeled as gpt5.1 but the model answer is saying is gpt4.1 and a old knowledge cutoff. Request id resp_0bde5288ef235ddc01691b37426a4c81979421acbb227b322f

`Environment`

cli api

#
Additional Information

Please provide relevant details to help resolve the issue, such as:

  • ChatGPT Shared Link (if applicable).
  • Screenshots or videos demonstrating the problem.

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cloud wedge
#

full request log

radiant shale
#

The model doesn't know what model it is, it will answer with something which comes from it's training data. gpt-4.1 sounds about right for a newwer model. If you want a better answer, you need to include it in the system prompt.