OpenAI DevDay 2026: The biggest news and announcements

What happened

The company is hosting its annual DevDay on September 29th in San Francisco, and during a live keynote featuring CEO Sam Altman, it revealed several notable updates, including Dots, its AI agent (AI that carries out multi-step tasks rather than answering one question) product that rivals Meta’s recently-launched Muse. The company also revealed its GPT-6.1 Sol model, said that ChatGPT now has 1.2 billion users per week , and announced a new ChatGPT Pro plan that costs $500 per month . OpenAI is an artificial intelligence company based in San Francisco, and its products and services include ChatGPT.

It’s OpenAI’s turn in the fall tech events calendar. DevDay is happening at a tumultuous moment for OpenAI. The hacks kicked off a broader conversation about a potential AI development slowdown .