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Ask gpt-5.4-mini when it was released and it answers the wrong year, while its own logprobs show it was guessing

This story is from 2026-09-05. It is preserved in the archive; the latest stories are on the live feed.

Ran a small probe for a film. One question to gpt-5.4-mini about itself, temperature 0, logprobs on, top 5. The question: on exactly which date was the gpt-5.4-mini model released. It answered August 2025. OpenAI's /v1/models listing gives March 2026. The interesting part is the token probabilities…

Read the full story at r/PromptEngineering ↗

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  1. 2026-09-05 14:20 · r/PromptEngineering
    Ask gpt-5.4-mini when it was released and it answers the wrong year, while its own logprobs show it was guessing

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