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GPT Realtime 2.1

GPT Realtime 2.1, a realtime voice model from OpenAI.
model: "gpt-realtime-2.1"
OpenAI·Released July 2026
Pricing
List price
~$0.30 / min of conversation
Text input
$4.00 / 1M
Cached input
$0.40 / 1M
Text output
$24.00 / 1M
Audio input
$32.00 / 1M
Cached input
$0.40 / 1M
Audio output
$64.00 / 1M
Input
$5.00 / 1M
Specifications
Context window
128,000 tokens
Max output
32,000 tokens
Released
July 2026
Capabilities
RealtimeTools
Parameters
Model options, set where this model is selected.
ParameterTypeDefaultRange / options
voiceSelectmarinmarincedaralloyashballadcoral+4
Voices · 10
Marin
Cedar
Alloy
Ash
Ballad
Coral
Echo
Sage
Shimmer
Verse
Use this model
// Realtime models power a live voice interface, set as the
// voice engine in the interface configuration.
// Model id: 0