OpenAI

OpenAI breaks ground on a 1-gigawatt data center in Seline, Michigan — part of its Oracle compute complex — with Sam Altman cutting the ribbon. CFO Sarah Friar framed the build as a community commitment: ratepayers won't fund the power, alongside local jobs, taxes, and education investment.

OpenAI reports ChatGPT has surpassed 900 million weekly active users, with the fastest-growing region being Africa and fastest-growing languages including Azerbaijani and Kazakh. CFO Sarah Friar called it the front door that made AI 'a noun and a verb.'

OpenAI's Codex coding agent passed 5 million users over the weekend, up from near-zero in January 2026. CFO Sarah Friar said she 'pretty much wouldn't hire a finance person today that doesn't know how to use a tool like Codex.'

OpenAI ships GPT-5.5, introducing key updates targeting multi-agent orchestration, complex coding pipelines, and long-horizon tool execution.

OpenAI closed a $122 billion private round in March 2026 — described by CFO Sarah Friar as the largest private fundraise in history, dwarfing the prior record (Saudi Aramco's ~$30B IPO) by orders of magnitude. Friar framed the raise as buying 'maximum optionality' to fund compute years ahead of demand.

OpenAI releases GPT-5.4, a major unified flagship update incorporating critical logical execution and context pipeline improvements from the 5.3 branch.

OpenAI rolls out GPT-5.3 Instant, a high-speed, cost-optimized conversational and logical execution model.

OpenAI launches GPT-5.3-Codex, establishing elite new milestones in multi-agent logical coordination and deep code architecture mapping.

OpenAI's flagship consumer product reaches 900 million weekly active users, capturing ~70% of the total AI app market. It reached this scale in ~3 years, faster than Instagram (5 years) or TikTok (4 years).

OpenAI closes 2025 with a $20B+ annualized revenue run rate, up from $6B in 2024 and $2B in 2023. Revenue growth closely tracked compute expansion: 1.9 GW in 2025 vs 0.6 GW in 2024. Cash burn remains ~$17B/yr.

Beyond the ARR run-rate, OpenAI's actual total revenue for calendar 2025 was $13.1 billion — more than tripling year-over-year and beating the company's own internal forecast.

OpenAI reports 700 million weekly active ChatGPT users, up from 500M in July. The Q3–Q4 sprint is driven by the o1 reasoning model rollout and multimodal upgrades.

OpenAI launches GPT-5, a next-generation frontier multimodal model establishing new milestones in complex logic, native video processing, and abstract reasoning.

ChatGPT crosses the half-billion weekly active user mark, validating the mass-market AI consumer thesis. At this scale, inference cost becomes a core strategic constraint.

OpenAI re-anchored the Codex brand on an autonomous coding agent (cloud-and-CLI), competing with Claude Code and Cursor.

OpenAI releases the full flagship o3 reasoning model, breaking previous records in complex physics, chemistry, coding, and mathematical benchmarks.

OpenAI secures a massive $10 billion funding round at a $250 billion valuation led by global technology conglomerates to support massive multi-gigawatt compute scales.

OpenAI releases o3-mini, providing low-latency reasoning speeds and competitive coding capabilities for developers.

OpenAI's first general-purpose computer-use agent product. Browser-based, available on the Pro tier.

OpenAI's browser product, positioning the chat surface as the navigation layer of the web.

OpenAI ends fiscal 2024 with $6 billion in annualized revenue, a 3× increase from 2023, fueled primarily by ChatGPT Plus subscriptions and the GPT-4 API enterprise adoption cycle.

OpenAI releases the complete o1 model family, integrating deep reasoning capabilities directly into its flagship API and ChatGPT platforms.

OpenAI raises $6.6 billion at a historic $157 billion post-money valuation, backed by Microsoft, Nvidia, SoftBank, and global venture funds to accelerate frontier research.

OpenAI unveils its first reinforcement-learning reasoning models, releasing o1-preview and o1-mini to ChatGPT Plus and API tiers.

OpenAI launches GPT-4o-mini as a high-speed, cost-effective multimodal model to completely replace GPT-3.5 Turbo.

OpenAI launches GPT-4o, natively integrating real-time audio, vision, and text processing in a single fast-inference model.

OpenAI releases the GA version of GPT-4 Turbo with vision (`gpt-4-turbo-2024-04-09`), increasing context logic and performance.

A year into the generative AI boom, the total category of consumer AI apps (almost entirely driven by ChatGPT) reaches approximately 100 million weekly active users.

OpenAI announces GPT-4 Turbo in preview (`gpt-4-1106-preview`), raising context to 128k, dropping prices, and adding JSON mode.

User-built configurations of ChatGPT, the first attempt at an app-store layer above a foundation model.

OpenAI releases GPT-4, setting the ultimate gold standard for reasoning, coding, professional exams, and complex instructions.

OpenAI launches ChatGPT, a free conversational interface built on the InstructGPT (GPT-3.5) series.

The launch that started the modern AI consumer category. Free, conversational, and on the web.

OpenAI rolls out InstructGPT models, utilizing RLHF to align model outputs with human instructions.

OpenAI releases the commercial API private beta for GPT-3 (175B parameters), showcasing early in-context learning.