This is not conclusive at all. Broadly there are two possible reasons why ChatGPT could have degraded (not saying it has). 1) OpenAI have higher user base tha

This is not conclusive at all. Broadly there are two possible reasons why ChatGPT could have degraded (not saying it has). 1) OpenAI have higher user base than expected, so costs are very high/compute is limited to serve the full model, so they are using speculative decoding with a changed threshold to reduce costs. 2) OpenAI have changed the weights or control structure of the model in a way that is negative for performance. There is are two possible motivations a) reducing hallucination and/or ‘unwoke’ responses that might embarrass msft/openai or b) reduce capability of free/consumer product to push their new enterprise stuff. Theses are clear motivations for openai to make the model worse than it was. There is no conclusive/rigorous evidence either way, and anecdote seems to lean towards it being nerfed.