GPT-4o Realtime Preview

This model is not part of the weekly automatic sync. The figures below were confirmed on 2026-08-13.

Two-way ultra-low latency voice conversation API

GPT-4o Realtime Preview — OpenAI. Context window 128,000 tokens. API pricing (per 1M tokens): Input $5, Output $20. License: Proprietary.

Benchmarks · API pricing (per 1M tokens)

ProviderOpenAI
TierMid
Context window128,000 tokens
Max output4,096 tokens
LicenseProprietary
API pricing (per 1M tokens) · Input$5
API pricing (per 1M tokens) · Output$20
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