What did OpenAI change this week?
GPT-4, GPT-4o, Responses API, Assistants, tool calling
Healthy
2 changes from OpenAI this week.
Speed Becomes the Product as OpenAI and Google Sell Faster AI
OpenAI and Google both released faster artificial intelligence models this week. Both put speed at the center of the pitch, and both are starting to treat response time as something businesses will pay for on its own. OpenAI’s new tier is called Ultrafast, and for now it is a preview open to a...
Action: Re-run latency/cost checks and adjust timeout budgets.
Cerebras Powers OpenAI’s GPT-5.6 Sol Ultrafast Mode
SUNNYVALE, Calif., Aug. 14, 2026 — Cerebras has announced that it is powering Ultrafast mode, a new service tier in the OpenAI API for GPT-5.6 Sol. Available initially in limited preview to OpenAI customers, Ultrafast runs GPT-5.6 Sol at up to 750 output tokens per second and up to 14× faster than Standard processing. GPT-5.6 [...]
Action: Re-run latency/cost checks and adjust timeout budgets.