OpenAI Ultrafast mode now available on AI Gateway

OpenAI Ultrafast mode now available on AI Gateway - Vercel

AI Gateway now supports OpenAI's Ultrafast service tier, providing faster output for interactive applications and rapid coding iterations.

Currently, GPT 6 Astra and GPT 6.1 Sol are supported. To use Ultrafast, request it for openai/gpt-6-astra or openai/gpt-6.1-sol through AI SDK, the Chat Completions API, or Responses API:

API

Chat Completions

Responses API

1
import
{
generateText
}
from
'ai'
;
2
3
const
{
text
}
=
await
generateText
(
{
4
model
:
'openai/gpt-6.1-sol'
,
5
prompt
:
'Investigate the failing tests and propose a fix.'
,
6
providerOptions
:
{
7
openai
:
{
serviceTier
:
'ultrafast'
}
,
8
gateway
:
{
only
:
[
'openai'
]
}
,
9
}
,
10
}
)
;
11
12
console
.
log
(
text
)
;

Copy for agent

View model details

↗

For workflows with frequent tool calls, OpenAI recommends the Responses API over a persistent WebSocket connection to reduce overhead between turns. See the Ultrafast service-tier examples for persistent connections, including AI SDK over WebSocket.

Ultrafast supports US and global processing. Requests pinned to unsupported regions, such as the EU, run at the standard ( default ) tier. Standard processing remains the default when no service tier is specified.

Requests served at Ultrafast are billed at 6× the standard per-token rate, while requests that fall back to another tier are billed at the rate for the tier actually served. Check the GPT-6 Astra or GPT-6.1 Sol model pages for current rates and learn more about the GPT-6 model family .