CLAIM-2026-09-30-03
OpenAI's Ultrafast tier, announced 29 September 2026, offers "up to 8x faster token generation (300 tokens per second) in Codex and up to 6x in the API", available as GPT-6 Astra Ultrafast in the API and in ChatGPT Work and Codex on Pro 500 and Enterprise.
Why it matters
300 tokens per second is the point at which a voice agent's turn latency stops being the reason not to build one.
Sources
- openai2026devday