Fast mode

OpenAI

2026-09-28 08:46:09

OpenAI’s mysterious “o” assistant surfaces in code ahead of Sept. 29 DevDay

Evidence pointing to a new OpenAI product called “o” has surfaced in ChatGPT code and user-facing upgrade text, suggesting the company may unveil an always-on AI assistant at its Sept. 29 developer event. A developer identified as Chetaslua reportedly found a direct internal note stating, “Lowercase o is the assistant's product name,” while other references included the phrase “o, your always-on assistant,” a display-name setting, and an “-o” email suffix in configuration logic. The material cited in the source describes “o” as a long-running agent built to stay active in the cloud rather than stop after each prompt-response turn. Reported features include support for 63 languages, a “Fast Mode,” a hosted sandbox for persistent execution, and a shared message board for multiple agents handling different roles such as planning, research, coding, and review. The article also says access is tied to higher-priced tiers: $100 Pro Lite, $200 Pro, and an unreleased $500 Pro Max, while $20 Plus and Codex Plus users are excluded. It frames that split as a sign OpenAI is separating coding assistants from agents built to carry out broader work. OpenAI has not formally confirmed those details in the provided material, but the Sept. 29 DevDay is presented as the key date to watch.

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OpenAI

2026-07-31 01:24:52

OpenAI cuts prices for parts of the GPT-5.6 lineup and rolls out a new API mode

OpenAI said it is adjusting pricing and performance across parts of its GPT-5.6 model family in a move aimed at improving cost efficiency for enterprise AI use cases. According to the company’s post on X, the price of GPT-5.6 Luna has been reduced by 80%, while GPT-5.6 Terra is now 20% cheaper. OpenAI also said the lower pricing will be reflected in how paid subscription usage is counted for Codex and ChatGPT Work. Separately, the company introduced a Fast mode in its API, replacing the earlier Priority Processing service. Under Fast mode, GPT-5.6 Sol can process requests at up to 2.5 times the speed of the standard mode. That option is priced at twice the standard processing rate, while the model’s capabilities remain unchanged.

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