It's pretty telling that even with RL post-training the big labs have essentially made little progress on the hallucination rate of models. The issue is fundamental to the current paradigm, contrary to humans.
GPT-6 Astra (max) has a hallucination rate of 51% and Claude Opus 5.5 (max) has a rate of 59% according to Artificial Analysis [1].
AA-Omniscience Hallucination Rate (lower is better) measures how often the model answers incorrectly when it should have refused or admitted to not knowing the answer. It is defined as the proportion of incorrect answers out of all non-correct responses, i.e. incorrect / (incorrect + partial answers + not attempted)
Full speed ahead like an idiot savant trying a thousand different possibilities, though half of which are without basis in reality.
GPT-6 Astra (max) has a hallucination rate of 51% and Claude Opus 5.5 (max) has a rate of 59% according to Artificial Analysis [1].
Full speed ahead like an idiot savant trying a thousand different possibilities, though half of which are without basis in reality.[1]:https://artificialanalysis.ai/evaluations/omniscience#omnisc...