GPT-6 Astra Fast Mode
Astra's lower-latency API processing option and the cost tradeoff behind it.
Short answer
OpenAI says Fast mode can deliver up to 2× the speed of Standard processing at 2× the Standard price.
Fast vs Standard
| Mode | Relative speed | Relative processing price | Best fit |
|---|---|---|---|
| Standard | Baseline | 1× | Cost-sensitive production workloads |
| Fast | Up to 2× | 2× | Interactive workflows where latency materially affects UX |
When Fast mode may be worth it
- User-facing agents where waiting time directly affects conversion or task completion.
- Time-sensitive coding and computer-use loops.
- High-value professional workflows where minutes saved outweigh inference cost.
The “up to” qualifier matters: actual latency depends on workload, tools, reasoning effort and system conditions. Treat the 2× figure as vendor guidance, not a guaranteed per-request speedup.
Primary sources
Specifications and prices can change. We prefer first-party documentation and record the date each page was reviewed.