OpenAI Ultrafast Mode Makes Astra 8x Faster

Ultrafast is a meaningful upgrade for interactive coding, but it is fundamentally a latency-versus-cost tradeoff: the model stays the same while response speed increases sharply.

• –WebSockets help preserve the gains by reducing network overhead across repeated tool calls
• –The biggest benefit is faster agent feedback loops, making interactive Codex sessions feel more responsive
• –Ultrafast pricing is substantially higher than Standard, making it difficult to justify for batch or background workloads
• –Low default rate limits and US/global-only processing may limit enterprise adoption
• –Developers should reserve it for user-facing or time-critical workflows where waiting costs more than inference