GPT-Realtime-1.5

Closed Active Multimodal gpt-realtime-1-5

Realtime speech-to-speech model for voice agents and customer support.

Released
Feb 23, 2026
Context window
32K tokens
Max output
4.1K tokens
Parameters
Not disclosed
Input price
$4.00 per 1M
Output price
$16.00 per 1M

Prices are first-party list prices in USD at the standard tier. Last verified Oct 30, 2026.

Pricing

Launch priceFeb 23, 2026
$4.00 in / $16.00 out
Current price since Feb 23, 2026
$4.00 in / $16.00 out
Cached input $0.40 per 1M

Specifications

Developer
OpenAI
Model type
Multimodal
Architecture
Not disclosed
Parameters
Not disclosed
Input
Text Image Audio
Output
Text Audio
Knowledge cutoff
Sep 2024
License
Proprietary
API access
First-party API
Capabilities
Agentic Tool use