OpenAI has reinstated GPT-4o as a default model option for paid ChatGPT subscribers, reversing a controversial change made ...

ChatGPT has landed a scathing blow on Elon Musk's chatbot Grok after the billionaire instigated a bitter 'war of AI'.

Sam Altman has announced Auto Fast and Thinking modes for GPT-5 with 3000 messages per week, while restoring GPT-4o for paid ...