Users of ChatGPT have observed that the platform sometimes defaults to the "5.5 instant" model even when a different model, such as "5.6 Sol," is set as the default in user settings. This behavior suggests that ChatGPT might be employing an internal model router that selects the "5.5 instant" model automatically, potentially overriding user preferences without explicit notification. This could occur when users do not manually select specific intelligence or thinking parameters before initiating a chat. AI
IMPACT Potential user confusion and loss of control over model selection in ChatGPT.
RANK_REASON User observation of unexpected model behavior in a widely used AI product.
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