Yes, GPT-5 outperforms GPT-4o. The GPT-5 system card highlights that the GPT-5 models not only surpass previous models on benchmarks but are also significantly more useful for real-world queries. Notable improvements include a reduction in hallucinations and enhanced instruction following, which contribute to a more reliable performance compared to GPT-4o.
Specifically, in evaluations against OpenAI o3 and GPT-4o, GPT-5 demonstrated stronger safety performance, especially in handling ambiguous prompts and compliance with content policies, showcasing its advancements in safety training and overall effectiveness[1].
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