GitHub said on March 5, 2026 that GPT-5.4 is now generally available and rolling out in GitHub Copilot. The company claims early testing showed higher success rates plus stronger logical reasoning and task execution on complex, tool-dependent developer workflows.
OpenAI announced Codex for Open Source on March 6, 2026, pitching the program as practical support for maintainers who review code, manage large repositories, and handle security work. The program combines API credits, six months of ChatGPT Pro with Codex, and conditional Codex Security access for eligible projects.
OpenAI introduced ChatGPT for Excel on March 5, 2026. The feature targets paid ChatGPT users and adds spreadsheet-native analysis and formula generation, plus financial data connectivity for regulated workflows.
OpenAI announced Codex Security on X on March 6, 2026. Public materials describe it as an application security agent that analyzes project context to detect, validate, and patch complex vulnerabilities with higher confidence and less noise.
OpenAI announced an Operator upgrade adding Google Drive slides creation/editing and Jupyter-mode code execution in Browser. It also said Operator availability expanded to 20 additional regions in recent weeks, with new country additions including Korea and several European markets.
OpenAI announced GPT-5.4 on March 5, 2026, adding a new general-purpose model and GPT-5.4 Pro with stronger computer use, tool search efficiency, and benchmark improvements over GPT-5.2.
OpenAI reposted a thread announcing Codex integration into Prism, positioning it as a single environment for writing, computation, analysis, and iteration. The update points to tighter workflows for research-oriented knowledge work.
OpenAI said it published a new Chain-of-Thought controllability evaluation suite and research paper. The company reports that GPT-5.4 Thinking showed limited ability to obscure its reasoning, supporting chain-of-thought monitoring as a practical safety mechanism.
OpenAI announced that GPT-5.4 Thinking and GPT-5.4 Pro are rolling out in ChatGPT, while GPT-5.4 is already available in the API and Codex. The launch positions GPT-5.4 as a unified frontier model for reasoning, coding, and agentic workflows.
OpenAI, together with researchers from the Max Planck Institute for Physics and the University of Chicago, reported new single-minus amplitude formulas extended to gravitons. The work combines GPT-5.2 Pro-assisted conjecture generation with independent rigorous proofs and numerical checks.
OpenAI announced a new Learning Outcomes Measurement Suite focused on causal, evidence-based evaluation of AI in classrooms. The company says independent pilots in 2026 will span seven countries, more than 10,000 students, and 10 partner institutions.
OpenAI Developers posted that the Codex app is now available on Windows with a native agent sandbox and PowerShell-oriented developer environment support. The update extends Codex usage beyond previous desktop workflows and signals deeper Windows integration for agentic coding tasks.