OpenAI has made Ultrafast mode available for the model GPT-6.1 Sol to all API users
Ultrafast mode is available for the model GPT-6.1 Sol in the Responses API to all API users, subject to rate limits. According to OpenAI, it shortens the delays between generated output tokens and supports data residency in the USA and EU.
OpenAI has made Ultrafast mode available for the model GPT-6.1 Sol in the Responses API. It is available to all API users, and its use is subject to rate limits, which limit the number of requests and tokens processed. According to OpenAI, the mode shortens the intervals between generated output tokens.
The mode is enabled by using the identifier `gpt-6.1-sol` and the parameter `service_tier: "ultrafast"`. It supports global processing as well as data residency in the USA and EU. Pricing details are available through the pricing link in the source article.
Why it matters
Shorter delays between tokens may help applications that display a response as it is generated. Businesses can take the supported data residency in the USA and EU into account when deploying; usage remains subject to rate limits.
Two audiences, two different impacts
What this means
For individuals
Developers using the model GPT-6.1 Sol can try a mode in the Responses API that, according to OpenAI, speeds up response generation as it progresses.
For a business
For business integrations, the new service tier is also available with data residency in the USA and EU. Deployment planning needs to account for rate limits and the pricing for the mode.
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