Audio modelActive
GPT-Realtime 2.1
OpenAI
- Released
- -
- Data date
- September 22, 2026
- Model class
- Access
GPT-Realtime 2.1 updates GPT-Realtime 2 for voice-agent workflows. OpenAI calls out better alphanumeric recognition, silence and noise handling, and interruption behavior. The model accepts text, images, and audio and returns text and audio. Configurable reasoning and tool use make it broader than a transcription-only model.
The API profile provides a 128,000-token context and up to 32,000 output tokens. OpenAI notes that higher reasoning effort can increase latency and output token usage. GPT-Live-Transcribe remains the separate transcription specialist, while GPT-Realtime 2.1 combines audio input and output with reasoning and tool calls.
Specifications and access
| Specification | Value and source |
|---|---|
| Model class | Real-time audio modelSource |
| Access | APISource |
| API model ID | gpt-realtime-2.1Source |
| Input | Audio, image and textSource |
| Output | Audio and textSource |
| Task | Voice dialogueSource |
| Supported details | Real-time dialogue with tool callsSource |
| Context window | 128,000 tokensSource |
| Maximum output | 32,000 tokensSource |
| Knowledge cutoff | 2024-09-30Source |
| Reasoning | Configurable reasoning effort; tool calls supportedSource |
Popularity
40.5 / 100
Sources and data date
| Type | Evidence and data date |
|---|---|
| Additional source | OpenAI model documentation (retrieved September 22, 2026) · OpenAI GPT-Realtime-2.1 model documentation · Editorial description reviewed October 2, 2026 |
| Additional source | OpenRouter: Popularity index (derived), CC BY 4.0 |
| Additional source | Vercel AI Gateway: Popularity index (derived), CC BY 4.0 |
| Additional source | Creative Commons Attribution 4.0 |