Model Releases
This is Ultrafast. Our premium speed tier, Ultrafast offers up to 8x faster token generation (300 tokens per second) in Codex and up to 6x i…
OpenAI announced its new premium tier “Ultrafast,” which delivers significantly faster token generation—up to 8× quicker in Codex (≈300 tokens/sec) and up to 6× faster via the API. The announcement wa
OpenAI announced its new premium tier “Ultrafast,” which delivers significantly faster token generation—up to 8× quicker in Codex (≈300 tokens/sec) and up to 6× faster via the API. The announcement was posted on September 29, 2026 by @OpenAI on Twitter. This tier targets users needing high‑throughput language model interactions with markedly reduced latency.
Related
- Previewing Ultrafast mode: GPT-5.6 Sol at up to 14x the speed. Launching first in the OpenAI API to a select group of customers with expande…
- OpenAI previews Ultrafast, an API tier powered by Cerebras that runs GPT-5.6 Sol up to 14× faster and generates up to 750 output tokens per second (Zac Hall/9to5Mac)
Source: OpenAI (X) | 2026-09-29