GPT Realtime

Aug 2025
Retires Jan 20, 2027Move toGPT Realtime 2.1Newer version
GPT Realtime
Compare in
on
$32 / $64per 1M audio in / out
1 sfirst audio?
30.4τ-Voice
Aug 2025released

Ranking?

Full ranking →
1GPT Live 172.52Grok Voice 3.066.13GPT Realtime 1.551.54Gemini 3.8 Live Extended Thinking505Grok Voice 2.049.7
···
7GPT Realtime 2.145.68GPT Realtime37.79Gemini 3.1 Flash Live Preview36.3

Strong at

C
Speech & Voice#11 of 17

History

4 versions
35404550Oct 25Jan 26Apr 26Jul 26Release dateτ-Voice · RetailGPT Realtime1.522.1
35404550Oct 25Jan 26Apr 26Jul 26Release dateτ-Voice · RetailGPT Realtime1.522.1

Benchmarks

in Speech & Voice
Big Bench Audio · AA v1.283.3#17
Full-Duplex-Bench · AA subset v1/v1.593.9#14
Time to first audio · AA1#14
AA Speech Agent Arena · overall · Elo968.6#11
AA Speech Agent Arena · overall · Task Success89.4#7
AA Speech to Speech Index v2.069.1#11
AA Speech Agent Arena · agentic · Elo961.3#10
AA Speech Agent Arena · non-agentic · Elo968.9#12
τ-Voice · AA · aggregate30.4#11
τ-Voice · AA · airline31.3#16
τ-Voice · AA · retail37.7#8
τ-Voice · AA · telecom22.2#10
EVA-Bench · EVA-A accuracy pass40.7#8
EVA-Bench · EVA-X experience pass36.5#10
τ³-voice · Sierra · 1.0.0 · standard · retail36#4
τ³-voice · Sierra · 1.0.0 · standard · airline36#4
τ³-voice · Sierra · 1.0.0 · standard · telecom19.3#4
τ³-voice · Sierra · 1.0.0 · standard · overall30.4#4

FAQ

Is GPT Realtime free to use?›

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

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

#11 of 17 in Realtime.

Is GPT Realtime better than GPT Realtime 2.1?›

On τ-Voice · AA · retail, GPT Realtime scores 37.7 vs 45.6 — lower.

How can I use GPT Realtime?›

Through the OpenAI API.

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

Released 2025-08-28. It has been superseded by GPT Realtime 2.1.

Is GPT Realtime open source?›

No, GPT Realtime is a closed model available through an API.

What is GPT Realtime?›

GPT Realtime is a closed speech & voice model from OpenAI, released Aug 2025.

What are the best alternatives to GPT Realtime?›

GPT Live 1 (better).