OpenAI

OpenAI will remove tts-1, tts-1-hd and two GPT-4o mini TTS snapshots from the API on January 6, 2027. The recommended replacement is gpt-realtime-2.1-mini.

OpenAI says custom GPTs are scheduled to retire across ChatGPT plans on December 11, 2026, with a migration path to plugins. Qualified Enterprise workspaces with an approved deferral may continue until February 11, 2027.

OpenAI will remove gpt-image-1-mini, gpt-image-1.5 and the chatgpt-image-latest alias from the API on December 1, 2026. The recommended replacements are GPT Image 2.5 Sunburst or Flare.

OpenAI is scheduled to shut down the v1/prompts API and reusable prompt objects on November 30, 2026. The migration path is to keep prompt content in application code.

OpenAI is scheduled to shut down the Evals dashboard and API on November 30, 2026, after making existing evals read-only on October 31.

OpenAI says existing content on the deprecated Evals platform becomes read-only on October 31, 2026, ahead of the platform shutdown on November 30.

OpenAI will remove gpt-3.5-turbo-0125 and gpt-4-0613 snapshot aliases from the API on October 23, 2026. The documented replacements are GPT-5.6 Terra and GPT-5.6 Sol respectively.

OpenAI says billing for the trusted-access GPT-Rosalind research model begins on October 5, 2026, at $5 per million input tokens, $0.50 per million cached input tokens, and $25 per million output tokens.

OpenAI released GPT-6.1 Sol in the API as an updated workhorse model.

OpenAI added GPT-6 Sol and GPT-6 Luna to the API as capability and efficiency tiers in the GPT-6 family.

OpenAI released the Agents API as a unified platform interface for building and operating agentic applications.

OpenAI released GPT-Image-2.5 Sunburst and Flare as a new generation of image models.

OpenAI released GPT-6 Astra, a frontier model positioned for its most demanding reasoning and agentic workloads.

OpenAI reduced GPT-5.6 Sol API and credit pricing by more than 20% for three months, following earlier reductions for Terra and Luna.

OpenAI introduced GPT-5.6 Cyber for high-end defensive cybersecurity use through Daybreak.

OpenAI expanded Daybreak as a cyber-defense program and access platform for defensive security work.

OpenAI launched ChatGPT Work, a workspace for longer, multi-step professional tasks powered by GPT-5.6.

OpenAI launched GPT-5.6 Sol, Terra, and Luna broadly across ChatGPT, Codex, and the API.

OpenAI released GPT-Live-1 and GPT-Live-1 mini for low-latency, natively multimodal voice and realtime interaction.

OpenAI began a limited preview of GPT-5.6 Sol and previewed the Terra and Luna variants.

OpenAI expanded Codex with reusable plugins and a Sites workflow for building and publishing complete web experiences.

OpenAI and Microsoft announced the next phase of their partnership with amended commercial terms.

OpenAI discontinued the standalone Sora product as its video strategy shifted to newer experiences and models.

OpenAI released GPT-5.5 and GPT-5.5 Pro as upgraded frontier models for complex knowledge work and reasoning.

OpenAI released ChatGPT Images 2.0 with stronger world knowledge, instruction following, detail, and an images-with-thinking mode.

OpenAI announced the close of $122 billion in capital at an $852 billion post-money valuation.

OpenAI released GPT-5.4 mini and GPT-5.4 nano as smaller, lower-latency variants.

OpenAI released GPT-5.4 and GPT-5.4 Pro for professional work, coding, computer use, and long-context tasks.

OpenAI and Amazon announced a strategic partnership spanning investment, AWS compute, and distribution of OpenAI models and products.

OpenAI announced $110 billion of new investment from Amazon, NVIDIA, and SoftBank at a $730 billion pre-money valuation.

OpenAI released a research preview of GPT-5.3-Codex-Spark, a smaller model optimized for near-real-time coding.

OpenAI released GPT-5.3-Codex, an interactive agentic coding model for complex software and professional work.

OpenAI released GPT-5.2-Codex, an agentic coding model optimized for long-horizon software engineering.

OpenAI opened app submissions and launched an app directory in ChatGPT.

OpenAI released GPT-5.2 with improvements for professional knowledge work and long-context tasks.

OpenAI released GPT-5.1 for developers with improved coding, steerability, and agentic performance.

OpenAI and AWS announced a multi-year strategic partnership under which OpenAI would access AWS compute infrastructure.

OpenAI completed a recapitalization establishing OpenAI Group PBC as a public benefit corporation controlled by the nonprofit OpenAI Foundation.

OpenAI moved Codex to general availability and introduced Slack integration, an SDK, and administration features.

OpenAI launched the first interactive apps inside ChatGPT conversations.

OpenAI released the Apps SDK preview for developers to build interactive applications inside ChatGPT.

OpenAI released Sora 2, a video and audio generation model with improved physical realism and control.

OpenAI, Oracle, and SoftBank announced five new US Stargate data-center sites, moving planned capacity toward nearly 7 gigawatts.

OpenAI and NVIDIA announced a strategic partnership to deploy at least 10 gigawatts of NVIDIA systems for OpenAI infrastructure.

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.

OpenAI released GPT-5 across ChatGPT and the API, including mini, nano, and Pro variants.

OpenAI released gpt-oss-120b and gpt-oss-20b under an open-weight license.

OpenAI launched ChatGPT agent, combining web interaction, research, and execution capabilities in a unified agent.

OpenAI released o3-pro for more reliable reasoning by using additional compute.

OpenAI added remote MCP server support, image generation, Code Interpreter, and background mode to the Responses API.

OpenAI launched a cloud software-engineering agent capable of working on multiple coding tasks in parallel.

OpenAI released its native multimodal image-generation model gpt-image-1 through the API.

OpenAI released Codex CLI, an open-source coding agent that runs in the terminal.

OpenAI released o4-mini, a smaller reasoning model optimized for fast, cost-efficient reasoning.

OpenAI released o3, a reasoning model with strong performance across coding, mathematics, science, and visual tasks.

OpenAI released GPT-4.1, GPT-4.1 mini, and GPT-4.1 nano in the API with improved coding and instruction following.

OpenAI announced $40 billion in new funding led by SoftBank at a $300 billion post-money valuation.

OpenAI launched native image generation in GPT-4o for precise, context-aware image creation and editing.

OpenAI released the open-source Agents SDK for orchestrating single- and multi-agent workflows.

OpenAI launched the Responses API as a new foundation for building agentic applications with built-in tools.

OpenAI released GPT-4.5 as a research preview in ChatGPT and the API.

OpenAI launched deep research, an agentic ChatGPT capability for multi-step web research and synthesis.

OpenAI released o3-mini, a cost-efficient reasoning model optimized for science, mathematics, and coding.

OpenAI launched Operator, a browser-using agent capable of interacting with web interfaces.

OpenAI, SoftBank, Oracle, and MGX announced Stargate, a new company intended to invest $500 billion in US AI infrastructure over four years.

OpenAI launched the Sora video-generation product for ChatGPT Plus and Pro users, powered by Sora Turbo.

OpenAI launched ChatGPT Pro, a higher-tier subscription with expanded access to advanced models.

OpenAI released the full o1 reasoning model in ChatGPT and announced related API improvements.

OpenAI launched web search in ChatGPT with timely answers and source links.

OpenAI introduced Canvas, a collaborative interface for writing and coding projects in ChatGPT.

OpenAI closed a $6.6 billion funding round at a $157 billion post-money valuation.

OpenAI launched the Realtime API public beta for low-latency multimodal experiences.

OpenAI began expanding ChatGPT's Advanced Voice Mode with more natural real-time audio conversations.

OpenAI released its first o-series reasoning models, o1-preview and o1-mini.

OpenAI launched a limited prototype of SearchGPT with web answers and linked sources.

OpenAI released GPT-4o mini as a lower-cost small multimodal model.

OpenAI and Apple announced integration of ChatGPT into iOS, iPadOS, and macOS experiences.

OpenAI launched ChatGPT Edu for universities, with enterprise-grade controls and access to GPT-4o.

OpenAI released GPT-4o, an omni model designed for real-time reasoning across audio, vision, and text.

OpenAI introduced Sora, a text-to-video model, as a research preview for red teamers and selected creators.

OpenAI released text-embedding-3-small and text-embedding-3-large with improved performance and new dimension controls.

OpenAI launched ChatGPT Team, later renamed ChatGPT Business, for collaborative workplace use.

OpenAI launched the GPT Store for discovering and using custom GPTs.

OpenAI announced Sam Altman's return as CEO and an initial board chaired by Bret Taylor.

OpenAI's board announced that Sam Altman would depart as CEO and Mira Murati would serve as interim CEO.

OpenAI introduced user-configurable GPTs for creating tailored versions of ChatGPT.

OpenAI launched the Assistants API beta with Code Interpreter, Retrieval, and function calling.

OpenAI announced GPT-4 Turbo with a 128K context window, newer knowledge, and lower API pricing.

OpenAI made DALL-E 3 available to ChatGPT Plus and Enterprise users.

OpenAI launched ChatGPT Enterprise with enterprise security, privacy, administration, and higher-capacity access.

OpenAI introduced plugins connecting ChatGPT to third-party applications and fresh information.

OpenAI released GPT-4, a multimodal large model accepting image and text inputs and producing text outputs.

OpenAI made the Whisper speech-to-text model available through its API.

OpenAI released the Chat Completions API with gpt-3.5-turbo for developers.

OpenAI launched the $20-per-month ChatGPT Plus subscription in the United States.

OpenAI and Microsoft announced a multiyear, multibillion-dollar extension of their partnership, including Azure supercomputing investment and exclusive cloud-provider status.

OpenAI released text-embedding-ada-002, replacing multiple earlier embedding models with a more capable and lower-cost model.

OpenAI launched ChatGPT as a conversational research preview.

OpenAI removed the DALL-E beta waitlist and expanded access to new users.

OpenAI released Whisper, a multilingual speech-recognition model, together with model weights and inference code.

OpenAI introduced DALL-E 2 with higher-resolution image generation and editing capabilities.

OpenAI introduced instruction-following models trained with human feedback.

OpenAI released a new endpoint and model families for text and code embeddings.

OpenAI introduced Codex, a descendant of GPT-3 that translates natural language into code.

OpenAI introduced CLIP, a neural network trained on image-text pairs for transferable visual recognition.

OpenAI introduced DALL-E, a model that generates images from text descriptions.

OpenAI launched a general-purpose API for accessing its language models.

OpenAI published GPT-3, demonstrating few-shot learning at 175 billion parameters.

OpenAI released Jukebox, a neural network that generated music including rudimentary singing as raw audio.

OpenAI completed the staged GPT-2 release with the 1.5-billion-parameter model and accompanying research.

OpenAI released the 774-million-parameter GPT-2 model and shared further analysis of misuse and detection.

Microsoft invested $1 billion in OpenAI and the companies formed an exclusive cloud-computing partnership.

OpenAI introduced MuseNet, a deep neural network for generating multi-instrument musical compositions.

OpenAI Five defeated the reigning Dota 2 world champion team OG in a live best-of-three match.

OpenAI created a capped-profit entity, OpenAI LP, to scale investment in compute and talent while keeping the nonprofit mission in control.

OpenAI introduced GPT-2 and began a staged release process due to misuse concerns.

OpenAI presented its five-agent Dota 2 system trained through large-scale self-play.

OpenAI published the original GPT approach: generative pre-training followed by discriminative fine-tuning.

OpenAI released code for training reinforcement-learning agents from human feedback.

OpenAI introduced PPO, a family of policy-gradient methods designed for stability and simplicity.

OpenAI and DeepMind researchers showed how agents can learn complex behavior from human preference comparisons.

OpenAI released Baselines, open-source high-quality implementations of reinforcement-learning algorithms.

OpenAI released Universe, a software platform for training intelligent agents across games, websites, and applications.

OpenAI released the public beta of Gym, a toolkit for developing and comparing reinforcement-learning algorithms.

OpenAI launched as a nonprofit artificial intelligence research company with a mission to ensure artificial general intelligence benefits all of humanity.