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OpenAI Acquires Python Toolmaker Astral to Supercharge Codex: uv, Ruff, and ty Join the Fold
OpenAI announces acquisition of Astral, maker of popular Python tools uv, Ruff, and ty, to expand Codex which now has 2 million weekly active users.
GPT-5.4 Mini and Nano: OpenAI's Cost-Efficient Models Built for the Subagent Era
OpenAI launches GPT-5.4 mini and nano on March 17, delivering flagship-tier coding performance at a fraction of the cost with 400K context windows.
OpenAI Acquires Promptfoo to Fortify AI Agent Security Across the Enterprise
OpenAI announces acquisition of Promptfoo, the open-source AI security platform used by 25% of the Fortune 500, to embed red-teaming and vulnerability testing into its Frontier agent platform.
ChatGPT for Excel Launches in Beta: AI-Powered Spreadsheet Workflows Arrive
OpenAI releases ChatGPT for Excel as a beta add-in powered by GPT-5.4, enabling natural language financial modeling, formula debugging, and scenario analysis directly inside workbooks.
OpenAI Robotics Lead Resigns Over Pentagon Deal, Citing Surveillance and Autonomy Concerns
Caitlin Kalinowski, OpenAI's head of robotics, resigns over the company's Pentagon classified network deal, warning that surveillance and lethal autonomy safeguards were rushed.
OpenAI Launches GPT-5.4: Computer Use, 1M Token Context, and Tool Search
OpenAI releases GPT-5.4 with native computer control, a 1-million-token context window, and a new Tool Search system that cuts token usage by 47%.
GPT-5.3 Instant: OpenAI Cuts Hallucinations by 26.8% and Drops the 'Cringe'
OpenAI released GPT-5.3 Instant on March 3, 2026, reducing hallucination rates by up to 26.8% while eliminating the overly cautious, preachy tone that frustrated ChatGPT users.
GPT-5.4 Accidentally Leaked in OpenAI Codex Repository: What the Code Reveals
Developers spotted GPT-5.4 references twice in OpenAI's public Codex repo pull requests, revealing a 2-million-token context window and full-resolution image handling before the code was scrubbed.
OpenAI Secures Pentagon Classified Network Deal Hours After Anthropic Blacklisted
OpenAI deploys AI models in the Pentagon's classified network with three red-line safeguards, filling the gap left by Anthropic's supply-chain-risk designation.
OpenAI Finalizes $110 Billion Funding Round at $730 Billion Valuation
OpenAI closes the largest private funding round in history with $110B from Amazon, Nvidia, and SoftBank, reaching a $730 billion valuation.
OpenAI Nears $100 Billion Funding Round at an $850 Billion Valuation
OpenAI is finalizing the first phase of a record-breaking $100B+ funding round with Amazon, SoftBank, Nvidia, and Microsoft, pushing its valuation past $850 billion.
OpenAI Launches Trusted Access for Cyber: A $10M Bet on AI-Powered Defense
OpenAI introduces Trusted Access for Cyber, an identity-based framework pairing GPT-5.3-Codex's high-capability cybersecurity skills with $10 million in API credits to accelerate defensive security operations.
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