GPT-Realtime-1.5

audioproprietary

GPT-Realtime-1.5 is our flagship audio model for voice agents and customer support.

Intelligence
Speed
Context
32K
Max output
4K
Input price
$4/1M tokens
Output price
$16/1M tokens

Capabilities

Reasoning & Interaction
Tool Calling

Details

Provider OpenAI
Creator openai
Familygpt-realtime
Licenseproprietary
Statusactive
Typeaudio
Input modalitiesaudio, image, text
Output modalitiesaudio
Open weightNo
Parameters—
Architecture—
Max duration—
Sample rate—
Channels—
Languages—
Genres—
Release date—
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs

Endpoints

RealtimeWS
Low-latency streaming via WebSockethttps://api.openai.com/v1/realtime

Pricing

Audio tokensPer 1M tokens
InputCached inputOutput
Standard$32$0.4$64
Text tokensPer 1M tokens
InputCached inputOutput
Standard$4$0.4$16
Image tokensPer 1M tokens
InputCached inputOutput
Standard$5$0.5—

Family Comparison: gpt-realtime

ModelMax durationSample rateChannelsLanguagesGenresPricing
GPT-Realtime-Translate——————
GPT-Realtime-Whisper——————
GPT-Realtime-2.1 Mini—————$0.6$2.4
GPT-Realtime Mini—————$0.6$2.4
GPT-Realtime-1.5—————$4$16
GPT-Realtime-2.1—————$4$24
GPT-Realtime-2—————$4$24
GPT-Realtime—————$4$16

API

GET/v1/models/openai/gpt-realtime-1.5

GPT-Realtime-1.5

GPT-Realtime-1.5 is our flagship audio model for voice agents and customer support.

gpt-realtime-1.5
Changes · 9 entries
gpt-realtime-1.5updateca7a400Nov 2, 2026, 03:02 AM
namegpt-realtime-1.5→GPT-Realtime-1.5
descriptionGPT-Reatime-1.5 is our flagship audio model for voice age...→GPT-Realtime-1.5 is our flagship audio model for voice ag...
pricingtiers[{"label":"Text tokens","unit":"Per 1M tokens","columns":...→[{"label":"Audio tokens","unit":"Per 1M tokens","columns"...
gpt-realtime-1.5update118451aSep 24, 2026, 07:08 AM
pricingtiers[{"label":"Text tokens","unit":"Per 1M tokens","columns":...→[{"label":"Audio tokens","unit":"Per 1M tokens","columns"...
gpt-realtime-1.5updated68a4f1Jun 10, 2026, 02:10 AM
namegpt-realtime-1.5→GPT-Realtime-1.5
descriptionGPT-Reatime-1.5 is our flagship audio model for voice age...→GPT-Realtime-1.5 is our flagship audio model for voice ag...
gpt-realtime-1.5update6ee7faeMar 26, 2026, 06:57 PM
taglineThe best voice model for audio in, audio out.→The best voice model for audio in, audio out
gpt-realtime-1.5updatef43e286Mar 24, 2026, 04:45 AM
capabilitiesstreamingnovisionnostructured outputnojson modenofine tuningnoreasoningno
gpt-realtime-1.5update1cd659eMar 24, 2026, 04:19 AM
page_urlhttps://platform.openai.com/docs/models/gpt-realtime-1.5→https://developers.openai.com/api/docs/models/gpt-realtim...
gpt-realtime-1.5update2b100acMar 23, 2026, 05:30 AM
model_typeaudio
licenseproprietary
page_urlhttps://platform.openai.com/docs/models/gpt-realtime-1.5
open_weightno
tools["function_calling"]
gpt-realtime-1.5updateb50649fMar 21, 2026, 11:58 PM
model_typeother
pricingtiers[{"label":"Text tokens","unit":"Per 1M tokens","columns":...
knowledge_cutoff2024-09
taglineThe best voice model for audio in, audio out.
capabilitiestool callyes
endpoints["realtime"]
snapshots["gpt-realtime-1.5"]
gpt-realtime-1.5create7f5c66fMar 21, 2026, 05:16 AM