OpenAI Realtime API by OpenAI
Speech-to-speech models for real-time voice agents, priced per 1M audio and text tokens.
Voice (speech-to-text, text-to-speech)
＋ Build a stack with OpenAI Realtime API Website Official pricing GitHub
Price
from $10
pay as you go, list price
Free tier
No
SDK downloads
107M
npm openai · PyPI openai
Status
—
no public status page
How OpenAI Realtime API compares
OpenAI Realtime API is one of 12 APIs in the Voice (speech-to-text, text-to-speech) category on AgentGid. It is not among the 11 that can be started for free. 6 of them ship an official MCP server; OpenAI Realtime API does not. Its official SDK is the 1st most downloaded in the category (107M a week). See the full table.
Pricing
| Free tier | — |
|---|---|
| Cheapest paid plan | — |
| Usage price | gpt-realtime-2.1: audio $32 in / $64 out per 1M tokens; gpt-realtime-2.1-mini: audio $10 / $20 |
From the official pricing page, checked Oct 22, 2026. Prices change: confirm before you buy.
Use it from an agent
| MCP server | No MCP server found |
|---|---|
| npm | npm install openai |
| PyPI | pip install openai |
| GitHub | openai/openai-node · 11.2K stars · last push Oct 23, 2026 |
Alternatives to OpenAI Realtime API
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|---|---|---|---|---|---|
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| Cartesia Low-latency text-to-speech (Sonic), speech-to-text (Ink) and managed voice agents. |
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