[herval]

I don't have an accurate benchmark, but in my personal experience, gpt4o hallucinates substantially less than gpt4. We solved a ton of hallucination issues just by upgrading to it...

[MichaelZuo]

How much did you use the original GPT-4-0314?

(And even that was a downgrade compared to the more uncensored pre-release versions, which were comparable to GPT-4.5, at least judging by the unicorn test)

[herval]

I don't recall the original version we used unfortunately :(

in our case, the bump was actually from gpt-4-vision to gpt-4o (the use case required image interpretation)

It got measurably better at both image cases and text-only cases