We just launched GPT-5! There has been an unbelievable amount of safety work that went into this model, from factuality, to deception, to brand new safety training techniques. More details and plots in the 🧵

AMA with @sama + some members of the GPT-5 team Tomorrow 11am PT.

GPT-5 has 4 new chat personalities: Cynic, Robot, Listener, Nerd. Find them in Customize ChatGPT in settings. Research preview. Text-only. Opt-in. Change anytime. Written by Robot in GPT-5.

when you get access to gpt-5, try a message like "use beatbot to make a sick beat to celebrate gpt-5". it's a nice preview of what we think this will be like as AI starts to generate its own UX and interfaces get more dynamic. it's cool that you can interact with the synthesizer directly or ask chatgpt to make changes!

GPT-5 is here. Rolling out to everyone starting today.

wen GPT-5? In 10 minutes.

LIVE5TREAM THURSDAY 10AM PT

Want to see our open models in action? Watch how gpt-oss builds a video game—using tools step-by-step within chain-of-thought reasoning 👾🍓

We released two open-weight reasoning models—gpt-oss-120b and gpt-oss-20b—under an Apache 2.0 license. Developed with open-source community feedback, these models deliver meaningful advancements in both reasoning capabilities & safety.

Today we release gpt-oss-120b and gpt-oss-20b—two open-weight LLMs that deliver strong performance and agentic tool use. Before release, we ran a first of its kind safety analysis where we fine-tuned the models to intentionally maximize their bio and cyber capabilities 🧵