GPT Realtime 2.1

Jul 2026
GPT Realtime 2.1
Compare in
on
$32 / $64per 1M audio in / out
1.2 sfirst audio?
45.7τ-Voice
Jul 2026released

Rankingat high effort?

Full ranking →
1Raon SpeechChat 9B02Deepslate Opal0.43Eleven Realtime v1 Max0.64Eleven Realtime v1 Mini0.65Grok Voice 2.00.7
···
16Gemini 3.8 Live1.217GPT Realtime 2.11.218GPT Live 11.2

Strong at

B
Speech & Voice#6 of 17

History

4 versions
0.80.911.1Oct 25Jan 26Apr 26Jul 26Release dateTime to first audio (lower is better)GPT Realtime1.522.1
0.80.911.1Oct 25Jan 26Apr 26Jul 26Release dateTime to first audio (lower is better)GPT Realtime1.522.1

Benchmarks

in Speech & Voice
Big Bench Audio · AA v1.295.8#12
Full-Duplex-Bench · AA subset v1/v1.595.7#9
Time to first audio · AA1.2#17
AA Speech Agent Arena · overall · Elo937#12
AA Speech Agent Arena · overall · Task Success91.5#4
AA Speech to Speech Index v2.075.2#6
AA Speech Agent Arena · agentic · Elo926.3#12
AA Speech Agent Arena · non-agentic · Elo961.9#13
τ-Voice · AA · aggregate45.7#6
τ-Voice · AA · airline62#5
τ-Voice · AA · retail45.6#7
τ-Voice · AA · telecom29.4#6

FAQ

Is GPT Realtime 2.1 free to use?›

There is no free API; the cheapest paid price is $32 per 1M input tokens.

How good is GPT Realtime 2.1, and what is it best at?›

#6 of 17 in Realtime.

Is GPT Realtime 2.1 better than GPT Realtime?›

On Time to first audio · AA, GPT Realtime 2.1 scores 1 vs 1 — about the same.

How can I use GPT Realtime 2.1?›

Through the OpenAI API.

When was GPT Realtime 2.1 released? Is there a newer version?›

Released 2026-07-06. It is the current version in its line.

Is GPT Realtime 2.1 open source?›

No, GPT Realtime 2.1 is a closed model available through an API. The closest open-weights option here is Raon SpeechChat 9B.

What is GPT Realtime 2.1?›

GPT Realtime 2.1 is a closed speech & voice model from OpenAI, released Jul 2026, the successor to GPT Realtime.

What are the best alternatives to GPT Realtime 2.1?›

Raon SpeechChat 9B (open weights).