A deep dive into OWL, the new architecture powering ChatGPT Atlas—decoupling Chromium, enabling fast startup, rich UI, and agentic browsing with ChatGPT.

The initiative brings together some of the world's most prestigious research institutions to pioneer the use of AI in mathematical research.

gpt-oss-safeguard-120b and gpt-oss-safeguard-20b are two open-weight reasoning models post-trained from the gpt-oss models and trained to reason from a provided policy in order to label content under that policy. In this report, we describe gpt-oss-safeguard’s capabilities and provide our baseline safety evaluations on the gpt-oss-safeguard models, using the underlying gpt-oss models as a baseline. For more information about the development and architecture of the underlying gpt-oss models, see the original gpt-oss model model card⁠.

OpenAI introduces gpt-oss-safeguard—open-weight reasoning models for safety classification that let developers apply and iterate on custom policies.

Dai Nippon Printing (DNP) rolled out ChatGPT Enterprise across ten core departments to drive companywide adoption. Within three months, it achieved 95% faster patent research, 10x processing volume, 100% weekly active usage, 87% automation, and 70% knowledge reuse.

Discover how Doppel uses OpenAI’s GPT-5 and reinforcement fine-tuning (RFT) to stop deepfake and impersonation attacks before they spread, cutting analyst workloads by 80% and reducing threat response from hours to minutes.

OpenAI’s recapitalization strengthens mission-focused governance, expanding resources to ensure AI benefits everyone while advancing innovation responsibly.

Microsoft and OpenAI sign a new agreement that strengthens its long-term partnership, expands innovation, and ensures responsible AI progress.

Meeting the demands of the Intelligence Age will require strategic investment in energy and infrastructure. OpenAI’s submission to the White House details how expanding capacity and workforce readiness can sustain U.S. leadership in AI and economic growth.

This system card details GPT-5’s improvements in handling sensitive conversations, including new benchmarks for emotional reliance, mental health, and jailbreak resistance.

OpenAI collaborated with 170+ mental health experts to improve ChatGPT’s ability to recognize distress, respond empathetically, and guide users toward real-world support—reducing unsafe responses by up to 80%. Learn how we’re making ChatGPT safer and more supportive in sensitive moments.

Learn how Steuerrecht.com uses ChatGPT Business to streamline legal workflows, automate tax research, and scale client service—helping law firms boost productivity and stay competitive.

Introducing T5Gemma, a new collection of encoder-decoder LLMs.

We’re announcing new multimodal models in the MedGemma collection, our most capable open models for health AI development.

Gemma 3n is designed for the developer community that helped shape Gemma.

Gemini 2.5 Flash-Lite, previously in preview, is now stable and generally available. This cost-efficient model provides high quality in a small size, and includes 2.5 family features like a 1 million-token context window and multimodality.

We partnered with Darren Aronofsky, Eliza McNitt and a team of more than 200 people to make a film using Veo and live-action filmmaking.

New AI model integrates petabytes of Earth observation data to generate a unified data representation that revolutionizes global mapping and monitoring

New experimental AI tool helps people explore the context and origin of images seen online.

The International Mathematical Olympiad (“IMO”) is the world’s most prestigious competition for young mathematicians, and has been held annually since 1959. Each country taking part is represented by six elite, pre-university mathematicians who compete to solve six exceptionally difficult problems in algebra, combinatorics, geometry, and number theory.