> ## Documentation Index
> Fetch the complete documentation index at: https://prices.voicegateway.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# OpenAI S2S pricing

> 4 S2S model(s) from OpenAI, with the rate and where it came from.

Realtime models that bill audio as tokens in both directions. All rates are US dollars per 1,000,000 tokens. Source of truth: [`prices/providers/openai.yml`](https://github.com/mahimailabs/voice-prices/blob/main/prices/providers/openai.yml).

| Model                          | Name                         | Audio in \$ / Mtok | Audio out \$ / Mtok | Cached audio in \$ / Mtok | Text in \$ / Mtok | Text out \$ / Mtok |                                          Source | Last verified |
| ------------------------------ | ---------------------------- | -----------------: | ------------------: | ------------------------: | ----------------: | -----------------: | ----------------------------------------------: | ------------: |
| `gpt-4o-mini-realtime-preview` | gpt-4o-mini-realtime-preview |               \$10 |                \$20 |                     \$0.3 |             \$0.6 |              \$2.4 | <Badge color="green" size="sm">verified</Badge> |    2025-07-04 |
| `gpt-4o-realtime-preview`      | gpt-4o-realtime-preview      |               \$40 |                \$80 |                     \$2.5 |               \$5 |               \$20 | <Badge color="green" size="sm">verified</Badge> |    2025-07-04 |
| `gpt-realtime`                 | gpt-realtime                 |               \$32 |                \$64 |                     \$0.4 |               \$4 |               \$16 |      <Badge color="gray" size="sm">seed</Badge> |             - |
| `gpt-realtime-mini`            | gpt-realtime-mini            |               \$10 |                \$20 |                     \$0.3 |             \$0.6 |              \$2.4 |      <Badge color="gray" size="sm">seed</Badge> |             - |

What `verified`, `imported`, and `seed` mean is on [How Fresh?](/how-fresh). A rate that looks wrong is worth [reporting](https://github.com/mahimailabs/voice-prices/issues/new?template=add-provider.yml).