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Tests reveal that ChatGPT-5 hallucinates less than GPT-4o did – and Grok is still the king of making stuff up

ChatGPT 5 scores a low 1.4% on the Hallucination Leaderboard This puts it ahead of ChatGPT-4 which scores 1.8% and GPT-4o, ...

OpenAI is editing its GPT-5 rollout on the fly — here’s what’s changing in ChatGPT

OpenAI must stabilize infrastructure, tune personalization, and decide how to moderate immersive interactions.
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GPT-5 Reduces the Need to Choose Models in ChatGPT

OpenAI moves away from requiring users to choose between many different models in ChatGPT, instead allowing the system to ...