GPT-4o Realtime
GPT-4o Realtime is OpenAI's language model with a 128K context window and up to 4K output tokens, available from 2 providers, starting at $5.00 / 1M input and $20.00 / 1M output. Preview release of GPT-4o Realtime, enabling bidirectional audio and text streaming over WebRTC or WebSocket for interactive voice applications.
Capabilities
Input2/5
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
| Provider | Standard | ||||
|---|---|---|---|---|---|
| Input $ / 1M | Output $ / 1M | Cache Read $ / 1M | Audio In $ / 1M | Audio Out $ / 1M | |
OpenAI | $5.00 | $20.00 | $2.50 | $40.00 | $80.00 |
 Azure AI Foundry | $5.50 | $22.00 | $2.75 | $44.00 | $80.00 |
Cost Calculator
Preset:
Versions
| Version | Released | Context | Input / 1M | Output / 1M | Status |
|---|---|---|---|---|---|
| GPT-5.5 | 1.1M | $5.00 | $30.00 | Available | |
| GPT-5.4 Mini | 1.1M | $0.750 | $4.50 | Available | |
| GPT-5.4 Nano | 1.1M | $0.200 | $1.25 | Available | |
| GPT-5.4 | 1.1M | $2.50 | $15.00 | Available | |
| GPT-5.3 Codex | 400K | $1.75 | $14.00 | Available | |
| GPT-5.2 Codex | 400K | $1.75 | $14.00 | Available | |
| GPT-5.2 | 410K | $1.75 | $14.00 | Available | |
| GPT-5.1 | 410K | $1.25 | $10.00 | Available | |
| GPT-5.1 Codex | 400K | $1.25 | $10.00 | Available | |
| GPT-5.1 Codex Mini | 400K | $0.250 | $2.00 | Available | |
| GPT-4o Realtime | 128K | $5.00 | $20.00 | Current |