### The Feature

`model_prices_and_context_window.json` carries Soniox's async models (`soniox/stt-async-v4`, `soniox/stt-async-v5` — added in #29508 / #30672) but not the real-time streaming model `stt-rt-v5`, which is priced differently:

| Model | Published rate | In price map | |---|---|---| | `stt-async-v4` / `stt-async-v5` | $0.10/hr → `output_cost_per_second: 2.77778e-05` | ✅ | | `stt-rt-v5` | **$0.12/hr** | not present |

Source: https://soniox.com/pricing ("Real-time (streaming): $0.12/hr"; the model name `stt-rt-v5` is stated on the page). Diarization, language ID and smart formatting are bundled into the hourly rate, so a flat per-second entry is complete.

### Scope notes (for maintainers deciding whether this belongs)

To be upfront: the absence is not an oversight — LiteLLM's Soniox integration deliberately supports only the async REST API (`/v1/audio/transcriptions`; the provider tooltip in `provider_create_fields.json` states realtime STT and TTS "are not yet available"). So this is a request to add a **pricing-metadata-only row for a model LiteLLM cannot currently invoke**, useful because the price map is widely consumed as a cost-reference dataset beyond the route…