Sam Altman says ChatGPT has hit 800M weekly active users (techcrunch.com)

OpenAI CEO Sam Altman announced at Dev Day that ChatGPT has reached 800 million weekly active users, up from 700 million just two months ago and 500 million at the end of March. He also highlighted platform-scale metrics — about 4 million developers have built with OpenAI and the API handles roughly 6 billion tokens per minute — underscoring rapid consumer, developer, enterprise and government adoption. OpenAI says it’s racing to secure more AI chips and expand infrastructure to keep up with demand. To accelerate developer-driven growth, OpenAI previewed an Apps SDK that lets developers build “real apps” inside ChatGPT — interactive, adaptive and personalized experiences you can chat with. That shift from experimentation to embedded app ecosystems has technical and strategic implications: it will drive further API traffic and token throughput, intensify competition for GPU/accelerator supply, and push investments in latency, safety, and orchestration tooling. For the AI/ML community, the milestone signals mainstreaming of large language models as production platforms, opening new opportunities for application design, third‑party integrations, and scaling challenges around compute, cost and model governance.