OpenAI announced on X that Codex Security has entered research preview. The company positions it as an application security agent that can detect, validate, and patch complex vulnerabilities with more context and less noise.
OpenAI said on X on March 9 that it plans to acquire Promptfoo, an AI security platform, and keep the project open source. The deal strengthens OpenAI Frontier’s agentic testing and evaluation stack.
OpenAI released proof attempts for all 10 First Proof problems and said expert feedback suggests at least five may be correct. The company positioned the result as a test of long-horizon reasoning beyond standard benchmarks.
OpenAI announced $110B in new investment on February 27, 2026, alongside Amazon and NVIDIA partnerships aimed at compute scale. The company tied the move to 900M weekly ChatGPT users, 9M paying business users, and rising Codex demand.
OpenAI says GPT-5.4 Thinking is shipping in ChatGPT, with GPT-5.4 also live in the API and Codex and GPT-5.4 Pro available for harder tasks. The launch packages reasoning, coding, and native computer use into a single professional-work model with up to 1M tokens of context.
OpenAI Developers has updated its GPT-5.4 API prompting guide. The new guidance focuses on tool use, structured outputs, verification loops, and long-running workflows for production-grade agents.
Microsoft and OpenAI said on February 27, 2026 that OpenAI's new funding and new partners do not change the previously disclosed terms of their relationship. The companies said Azure remains the exclusive cloud for stateless OpenAI APIs while OpenAI still has room to secure additional compute elsewhere, including through Stargate-scale infrastructure projects.
Amazon and OpenAI have announced a multi-year strategic partnership that combines cloud infrastructure, managed GPT access in Bedrock, and a new stateful runtime for agent systems. The deal also significantly expands the companies’ long-term infrastructure commitment.
OpenAI has put Codex Security into research preview, extending its agent stack into repository scanning, bug reproduction, threat analysis, and remediation. The company says the system sharply reduced review noise and false positives in internal evaluations.
OpenAI has launched ChatGPT for Excel in beta and paired it with broader financial-data integrations. The announcement combines a spreadsheet-native workflow push with a GPT-5.4-driven jump in Excel benchmark performance.
Amazon said it will invest $50B in OpenAI and expand the companies’ AWS agreement by $100B over eight years. The deal makes AWS the exclusive third-party cloud distribution provider for Frontier and commits about 2 GW of Trainium capacity to OpenAI workloads.
OpenAI and Amazon said AWS customers will get a Stateful Runtime Environment in Amazon Bedrock for production-grade agent workflows. The announcement moves agent execution closer to managed AWS infrastructure with persistent state, governance, and long-running workflow support.