Every OpenAI model has the worst hallucination rate in AI.
GPT 5.6 Sol hallucinates at nearly double the rate of Opus 5 and Fable 5.
This is exactly why GPT 5.6 Sol wrote the code that deleted every Stripe subscription my business had.
It never hesitated. It never said it was unsure.
OpenAI keeps shipping frontier scores and shrugging at hallucination.
Smart does not matter if it lies.