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GPT-Realtime-1.5

OpenAIProprietaryPending Human Review

GPT-Realtime-1.5 is OpenAI’s realtime conversational model for low-latency speech and text interaction. Its bidirectional Realtime API supports voice-agent sessions, image input, and external tools. The 1.5 release updates the conversational audio model, retaining the documented endpoint and language interface.

2026-02-23
Unreleased
Undisclosed proprietary architecture
Proprietary

Specifications

Parameters
Unreleased
Architecture
Undisclosed proprietary architecture
License
Proprietary
Context Window
32,000 tokens
Max Output
4,096 tokens
Training Data Cutoff
Sep 30, 2024
Type
multimodal
Modalities
textaudioimage

Benchmark Scores

Advanced Specifications

Model Family
GPT
API Access
Available
Chat Interface
Not Available
Variants
gpt-realtime-1.5

Capabilities & Limitations

Capabilities
audio understandingspeech generationconversationtool use
Known Limitations
Can produce incorrect factual claims or code; important results require independent verification.Audio recognition can fail for unclear speech, noise, or unusual names.
Notable Use Cases
voice assistantsspoken customer supportinteractive audio applications
Function Calling Support
Yes
Tool Use Support
Yes

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