GPT-Realtime-2.1 Mini

OpenAI's smaller, cheaper speech-to-speech tier for the Realtime API, with reasoning and tool use.

Where it ranks

C
Voice agents
Models · Cloud · 844 on Artificial Analysis Speech Agent Arena (models)

Vendor: OpenAI
Family: GPT-Realtime Mini
Released: 6 Jul 2026
Weights: Closed: API and apps only
License: proprietary
API price: $10 in / $20 out per 1M tokens (Audio tokens, USD per 1M (text tokens $0.60 in / $2.40 out).); $0.08 per minute of audio (Artificial Analysis 'Cost per Hour of Input Audio' for GPT-Realtime-2.1 Mini Minimal, OpenAI ($4.596/hour: cost of its Big Bench Audio run normalised to input-audio length) divided by 60.)
Last verified: 18 Oct 2026

Price from developers.openai.com, 18 Oct 2026.

Benchmark	Result	Entry on the leaderboard	As of	Source
Artificial Analysis Big Bench Audio (speech reasoning)	74.7%	`GPT-Realtime-2.1 Mini High, OpenAI` Big Bench Audio speech reasoning (audio in, audio out); embedded value 0.747 as percent; no last-updated date shown.	18 Oct 2026	artificialanalysis.ai
Artificial Analysis Speech Agent Arena (models)	844	`GPT-Realtime-2.1 Mini Minimal` Speech Agent Arena Elo (overall slice; GPT-Realtime-1.5 anchored at 1000), rank 26 of 27, 847 appearances, 95% CI 817.26-870.08; embedded data on the speech-to-speech page.	18 Oct 2026	artificialanalysis.ai
Artificial Analysis Speech to Speech Index	54	`GPT-Realtime-2.1 Mini Minimal` AA-Speech to Speech Index (weighted: Big Bench Audio, tau-Voice agentic, arena preference, task success); raw embedded value, page shows it rounded; no last-updated date shown.	18 Oct 2026	artificialanalysis.ai