OpenAI has launched GPT-6.1 Sol as a cost-effective alternative to its flagship model, GPT-6 Astra. It offers near-Astra performance for coding and professional workflows at a significantly lower API ...

OpenAI began rolling GPT-6 Sol into paid ChatGPT tiers on Wednesday, and Free and Go users get GPT-6 Luna from October 8.

GPT-6 Sol and Luna arrive less than three months after GPT-5.6, with OpenAI claiming major accuracy gains, dramatic cost reductions, and oddly revealing Claude comparisons across key benchmarks. Today ...

ChatGPT has become so much more than just chat over the last year. To that end, OpenAI is removing limits on text chat. ChatGPT will also improve with a smarter version of GPT-5.6 Sol. Details below.

OpenAI is making a significant change to its model lineup, with GPT-5.5 set to leave some of its major products next month as users are moved towards newer models.