Releases
125 matching — model launches, API releases, product updates, financial events and news.
March 20263
Mar 31, 2026
OpenAI closes $122 billion funding at $852 billion post-money valuationFunding round
OpenAI announced the close of $122 billion in capital at an $852 billion post-money valuation.
Mar 17, 2026GPT-5.4 mini and nano releasedModel release
OpenAI released GPT-5.4 mini and GPT-5.4 nano as smaller, lower-latency variants.
Mar 5, 2026GPT-5.4 and GPT-5.4 Pro releasedModel release
OpenAI released GPT-5.4 and GPT-5.4 Pro for professional work, coding, computer use, and long-context tasks.
February 20264
Feb 27, 2026OpenAI and Amazon announce strategic partnershipPartnership
OpenAI and Amazon announced a strategic partnership spanning investment, AWS compute, and distribution of OpenAI models and products.
Feb 27, 2026OpenAI announces $110 billion investment at $730 billion pre-money valuationFunding round
OpenAI announced $110 billion of new investment from Amazon, NVIDIA, and SoftBank at a $730 billion pre-money valuation.
Feb 12, 2026GPT-5.3-Codex-Spark research preview releasedModel release
OpenAI released a research preview of GPT-5.3-Codex-Spark, a smaller model optimized for near-real-time coding.
Feb 5, 2026GPT-5.3-Codex releasedModel release
OpenAI released GPT-5.3-Codex, an interactive agentic coding model for complex software and professional work.
December 20253
Dec 18, 2025GPT-5.2-Codex releasedModel release
OpenAI released GPT-5.2-Codex, an agentic coding model optimized for long-horizon software engineering.
Dec 17, 2025ChatGPT app submissions opened to developersFeature update
OpenAI opened app submissions and launched an app directory in ChatGPT.
Dec 11, 2025GPT-5.2 releasedModel release
OpenAI released GPT-5.2 with improvements for professional knowledge work and long-context tasks.
November 20252
Nov 13, 2025GPT-5.1 releasedModel release
OpenAI released GPT-5.1 for developers with improved coding, steerability, and agentic performance.
Nov 3, 2025OpenAI and AWS announce strategic partnershipPartnership
OpenAI and AWS announced a multi-year strategic partnership under which OpenAI would access AWS compute infrastructure.
October 20254
Oct 28, 2025OpenAI completes recapitalizationNews
OpenAI completed a recapitalization establishing OpenAI Group PBC as a public benefit corporation controlled by the nonprofit OpenAI Foundation.
Oct 6, 2025Codex became generally availableFeature update
OpenAI moved Codex to general availability and introduced Slack integration, an SDK, and administration features.
Oct 6, 2025Apps in ChatGPT launchedProduct launch
OpenAI launched the first interactive apps inside ChatGPT conversations.
Oct 6, 2025Apps SDK preview releasedSDK release
OpenAI released the Apps SDK preview for developers to build interactive applications inside ChatGPT.
September 20254
Sep 30, 2025Sora 2 releasedModel release
OpenAI released Sora 2, a video and audio generation model with improved physical realism and control.
Sep 23, 2025Five new Stargate sites announcedPartnership
OpenAI, Oracle, and SoftBank announced five new US Stargate data-center sites, moving planned capacity toward nearly 7 gigawatts.
Sep 22, 2025OpenAI signs NVIDIA systems partnershipPartnership
OpenAI and NVIDIA announced a strategic partnership to deploy at least 10 gigawatts of NVIDIA systems for OpenAI infrastructure.
Sep 11, 2025OpenAI outlines nonprofit-controlled public benefit corporation structureNews
OpenAI and Microsoft announced a non-binding memorandum of understanding for the next phase of their partnership, alongside plans for the nonprofit to control a public benefit corporation and hold a substantial equity stake.
August 20252
Aug 7, 2025GPT-5 model family releasedModel release
OpenAI released GPT-5 across ChatGPT and the API, including mini, nano, and Pro variants.
Aug 5, 2025gpt-oss open-weight models releasedOpen weights
OpenAI released gpt-oss-120b and gpt-oss-20b under an open-weight license.
July 20251
Jul 17, 2025ChatGPT agent launchedProduct launch
OpenAI launched ChatGPT agent, combining web interaction, research, and execution capabilities in a unified agent.
June 20251
Jun 10, 2025OpenAI o3-pro releasedModel release
OpenAI released o3-pro for more reliable reasoning by using additional compute.
May 20251
May 21, 2025Responses API gains remote MCP, image generation, and Code InterpreterAPI update
OpenAI added remote MCP server support, image generation, Code Interpreter, and background mode to the Responses API.