GPT Realtime 2.1 Mini
GPT Realtime 2.1 Mini is OpenAI's language model with a 128K context window and up to 32K output tokens, starting at $0.6 / 1M input and $2.40 / 1M output. A distilled, lower-cost variant of GPT Realtime 2.1 optimized for faster voice interactions with audio and text input over WebRTC, WebSocket, or SIP.
Capabilities
Input3/5
Text✓
Image✓
Audio✓
Video·
PDF·
Output2/5
Text✓
Image·
Audio✓
Video·
Embedding·
Capabilities2/13
Reasoning·
Adaptive Reasoning·
Function Calling✓
Parallel Function Calling✓
Structured Outputs·
Native JSON Schema·
Web Search·
URL Context·
Computer Use·
Code Execution·
File Search·
Prompt Caching·
Assistant Prefill·
Pricing by Provider
US Dollar ($)
Per 1M tokens
| Provider | Standard | |||||
|---|---|---|---|---|---|---|
| Input $ / 1M | Output $ / 1M | Cache Read $ / 1M | Audio In $ / 1M | Audio Out $ / 1M | Image In $ / 1M | |
| $0.6 | $2.40 | $0.06 | $10.00 | $20.00 | $0.8 | |
Cost Calculator
US Dollar ($)
Preset:
Versions
| Version | Released | Context | Input / 1M | Output / 1M | Status |
|---|---|---|---|---|---|
| GPT-5.4 Mini | 1.1M | $0.750 | $4.50 | Available | |
| GPT-5 Mini | 1.0M | $0.250 | $2.00 | Available | |
| GPT-5 Mini Medium | — | — | — | — | Available |
| GPT-5.4 Mini Medium | — | — | — | — | Available |
| GPT-5.4 Mini Non-Reasoning | — | — | — | — | Available |
| GPT-5 Mini Minimal | — | — | — | — | Available |
| GPT-4.1 Mini | 1.0M | $0.400 | $1.60 | Deprecating | |
| GPT-4o mini Search Preview | 128K | $0.150 | $0.600 | Available | |
| GPT-4o mini Audio | 128K | $0.150 | $0.600 | Available | |
| GPT-4o mini Realtime | 128K | $0.600 | $2.40 | Available | |
| GPT Realtime 2.1 Mini | — | 128K | $0.600 | $2.40 | Current |
Other Models
| Model | Tier | Released | Context | Input / 1M | Output / 1M |
|---|---|---|---|---|---|
| GPT-5.6 Sol | — | 1.1M | $5.00 | $30.00 | |
| GPT-5.6 Terra | — | 1.1M | $2.50 | $15.00 | |
| GPT-5.6 Luna | — | 1.1M | $1.00 | $6.00 | |
| GPT-5.5 | — | 1.1M | $5.00 | $30.00 | |
| GPT-5.4 Nano | Nano | 1.1M | $0.200 | $1.25 | |
| GPT-5.4 | — | 1.1M | $2.50 | $15.00 | |
| GPT-5.3 Codex | — | 400K | $1.75 | $14.00 | |
| GPT-5.2 Codex | — | 400K | $1.75 | $14.00 | |
| GPT-5.2 | — | 410K | $1.75 | $14.00 | |
| GPT-5.1 | — | 410K | $1.25 | $10.00 |