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OpenAI launches GPT-5.5 for agentic coding, knowledge work and scientific research; the model first becomes available in ChatGPT and Codex, enters the API the following day and supports a context window of more than 1 million tokens.
OpenAI released ChatGPT Images 2.0 and made the GPT Image 2 generation-and-editing model available in its official model documentation.
To mark Codex's first anniversary, the Codex lead announces a reset across all plans.
OpenAI gives Codex users another usage reset after the 3 million-user milestone and launch of a new $100 subscription tier.
OpenAI adds a $100 Pro tier between $20 Plus and $200 Pro, with GPT-5.4 Pro access and revised Codex usage allowances.
After Codex dashboards show an unexplained surge to usage caps, OpenAI removes abusive accounts and resets limits across every plan.
During a Codex plugin launch, OpenAI resets usage across every plan to encourage more users to try the new plugins.
After stability problems caused by GPU-resource pressure recover, the Codex lead says the reset button has been pressed and the change should appear later.
After requests that received no response stabilize for several hours, the Codex lead announces a reset that is later delivered.
OpenAI releases GPT-5.4 for ChatGPT, the API and Codex, combining reasoning, coding, tool use and professional work with documents, spreadsheets and presentations in one flagship model.
After about 9% of Plus and Pro users miss a double-usage promotion, OpenAI fixes the issue and resets Codex limits for both plans.
Symphony turns project boards such as Linear into a control plane where coding agents claim tasks and deliver work from isolated environments.
OpenAI makes GPT-Realtime-1.5 available through the Realtime API for real-time voice agents and customer support.
OpenAI's model documentation lists gpt-audio-1.5 as the default audio model, supporting bidirectional audio and text input and output.
Peter Steinberger joined OpenAI to lead next-generation personal agents, while OpenClaw stays an open project and moves to foundation governance.
A closed, developer-focused build that combines GPT-5's general capabilities with OpenAI's advanced code-generation stack.
During a holiday promotion, Codex limits are reset and temporarily increased to twice the usual allowance through January 1.
A follow-up update in the GPT-5 series that improves text diversity and further lowers the total cost of high-volume usage.
To mitigate an incident quickly, the team resets limits for all Codex users and says distribution will complete within ten minutes.
After several hours of unusually high latency in the United States and nearby regions, the team resets limits for all Codex users.
