GPT-Realtime-2.1 mini
Default
Reasoning model with tool use
Reasoning model with tool use
Reasoning
Higher
Speed
Very fast
Price
$0.6•$2.4
Input•Output
Input
Text, audio, image
Output
Text, audio
GPT-Realtime-2.1 mini is a distilled reasoning model for faster, lower-cost realtime voice interactions. It supports audio and text inputs over WebRTC, WebSocket, or SIP connections and improves alphanumeric recognition over GPT-Realtime-2.
Reasoning token support
Pricing
Pricing is based on the number of tokens used, or other metrics based on the model type. For tool-specific models, like search and computer use, there’s a fee per tool call. See details in the pricing page.
Text tokens
Per 1M tokens
Input
$0.60
Cached input
$0.06
Output
$2.40
Quick comparison
Input
Cached input
Output
GPT-Realtime-2.1 mini
$0.60
GPT-Realtime mini
$0.60
Audio tokens
Per 1M tokens
Input
$10.00
Cached input
$0.30
Output
$20.00
Image tokens
Per 1M tokens
Input
$0.80
Cached input
$0.08
Modalities
Text
Input and output
Image
Input only
Audio
Input and output
Video
Not supported
Endpoints
Chat Completions
v1/chat/completions
Responses
v1/responses
Realtime
v1/realtime
Realtime translation
v1/realtime/translations
Realtime transcription
v1/realtime/transcription_sessions
Assistants
v1/assistants
Batch
v1/batch
Fine-tuning
v1/fine-tuning
Embeddings
v1/embeddings
Image generation
v1/images/generations
Videos
v1/videos
Image edit
v1/images/edits
Speech generation
v1/audio/speech
Transcription
v1/audio/transcriptions
Translation
v1/audio/translations
Moderation
v1/moderations
Completions (legacy)
v1/completions
Features
Streaming
Not supported
Function calling
Supported
Structured outputs
Not supported
Fine-tuning
Not supported
Predicted outputs
Not supported
Snapshots
Snapshots let you lock in a specific version of the model so that performance and behavior remain consistent. Below is a list of all available snapshots and aliases for GPT-Realtime-2.1 mini.
gpt-realtime-2.1-mini
gpt-realtime-2.1-mini
gpt-realtime-2.1-mini
Rate limits
Rate limits ensure fair and reliable access to the API by placing specific caps on requests, tokens, audio duration, or other usage within a given time period. Your usage tier determines how high these limits are set and automatically increases as you send more requests and spend more on the API.
| Tier | RPM | TPM |
|---|---|---|
| Free | Not supported | |
| Tier 1 | 200 | 40,000 |
| Tier 2 | 400 | 200,000 |
| Tier 3 | 5,000 | 800,000 |
| Tier 4 | 10,000 | 4,000,000 |
| Tier 5 | 20,000 | 15,000,000 |