Last updated: Sep 4, 2025
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September 2025 Releasebot wasn't able to parse a release date from the source, so this is when the entry was added. Original Source
GPT-5 rollout across plans/platforms; new default and model picker for paid tiers.
GPT-5 is slowly rolling out to all users on ChatGPT Plus, Pro, Team, and Free plans worldwide across web, mobile, and desktop. GPT-5 will be available to ChatGPT Enterprise and Edu plans soon.
August 5, 2025 This release date was parsed from the original source when it was added (Sep 4, 2025). Original Source
Release of two open-weight models gpt-oss-120b and gpt-oss-20b for on-premise customization.
We’re releasing two open-weight reasoning models, gpt-oss-120b and gpt-oss-20b. Designed for teams that want to run and customize models on their own infrastructure or with hosting providers, these text-only models support common developer patterns like function calling and structured outputs.
June 10, 2025 This release date was parsed from the original source when it was added (Sep 4, 2025). Original Source
Introducing o3-pro: a longer-thinking, higher-accuracy version replacing o1-pro for Pro/Team, shipping today with staged Enterprise/Edu rollout and noted limitations.
Like o1-pro, o3-pro is a version of our most intelligent model, o3, designed to think longer and provide the most reliable responses. Since the launch of o1-pro, users have favored this model for domains such as math, science, and coding—areas where o3-pro continues to excel, as shown in academic evaluations. Like o3, o3-pro has access to tools that make ChatGPT useful—it can search the web, analyze files, reason about visual inputs, use Python, personalize responses using memory, and more. Because o3-pro has access to tools, responses typically take longer than o1-pro to complete. We recommend using it for challenging questions where reliability matters more than speed, and waiting a few minutes is worth the tradeoff.
June 7, 2025 This release date was parsed from the original source when it was added (Sep 4, 2025). Original Source
Advanced Voice for paid users with better intonation/naturalness, built-in translation, wider availability, plus earlier improvements; occasional audio quality changes and rare hallucinations noted.
We're upgrading Advanced Voice in ChatGPT for paid users with significant enhancements in intonation and naturalness, making interactions feel more fluid and human-like. When we first launched Advanced Voice, it represented a leap forward in AI speech—now, it speaks even more naturally, with subtler intonation, realistic cadence (including pauses and emphases), and more on-point expressiveness for certain emotions including empathy, sarcasm, and more.
June 6, 2025 This release date was parsed from the original source when it was added (Sep 4, 2025). Original Source
We are rolling back an o4-mini snapshot, that we deployed less than a week ago and intended to improve the length of model responses, because our automated monitoring tools detected an increase in content flags.
May 14, 2025 This release date was parsed from the original source when it was added (Sep 4, 2025). Original Source
GPT-4.1 mini ships faster, more capable than GPT-4o mini; API-release blog confirms evals and safety reviews accompany the update.
GPT-4.1 mini is a fast, capable, and efficient small model, delivering significant improvements compared to GPT-4o mini—in instruction-following, coding, and overall intelligence. Starting today, GPT-4.1 mini replaces GPT-4o mini in the model picker under "more models" for paid users, and will serve as the fallback model for free users once they reach their GPT-4o usage limits. Rate limits remain the same.
May 14, 2025 This release date was parsed from the original source when it was added (Sep 4, 2025). Original Source
GPT-4.1 launches in ChatGPT (coding-focused, stronger instruction/web dev), now accessible to Plus/Pro/Team via model picker; Enterprise/Edu rollout planned.
Since its launch in the API in April, GPT-4.1 has become a favorite among developers—by popular demand, we’re making it available directly in ChatGPT.
May 12, 2025 This release date was parsed from the original source when it was added (Sep 4, 2025). Original Source
We've improved GPT-4o's system instructions to help ensure the image generation tool is called when you want to generate an image in ChatGPT.
April 29, 2025 This release date was parsed from the original source when it was added (Sep 4, 2025). Original Source
Reverted the latest GPT-4o update due to sycophancy; ongoing improvements are discussed in blog posts.
We've reverted the most recent update to GPT-4o due to issues with overly agreeable responses (sycophancy).
April 25, 2025 This release date was parsed from the original source when it was added (Sep 4, 2025). Original Source
We’re making additional improvements to GPT-4o, optimizing when it saves memories and enhancing problem-solving capabilities for STEM. We’ve also made subtle changes to the way it responds, making it more proactive and better at guiding conversations toward productive outcomes. We think these updates help GPT-4o feel more intuitive and effective across a variety of tasks–we hope you agree!
