Compare models
Put up to 4 models beside each other — token prices, context windows, capabilities and provider, from the same catalogue the model pages read.
| Attribute | S2 Pros2-pro | Grok STT 1.0grok-stt-1.0 | Aura-2aura-2 |
|---|---|---|---|
| Pricing | |||
| Input | $0 / 1M | $0 / 1M | $0 / 1M |
| Output | $0 / 1M | $0 / 1M | $0 / 1M |
| Cache Write (5m) | Not applicable | Not applicable | Not applicable |
| Cache Write (1h) | Not applicable | Not applicable | Not applicable |
| Cache Read | Not applicable | Not applicable | Not applicable |
| Web Search | $0 / 1M | $0 / 1M | $0 / 1M |
| Context | |||
| Max context | N/A | N/A | N/A |
| Max output | N/A | N/A | N/A |
| Capabilities | |||
| Vision | No | No | No |
| Function Calling | No | No | No |
| JSON Mode | No | No | No |
| Streaming | No | No | No |
| Catalogue | |||
| Provider | Fish Audio | xAI | Deepgram |
| Category | voice | voice | voice |
| Charge type | Pay As You Go | Pay As You Go | Pay As You Go |
| Released | 2026-07-29 | 2026-07-23 | 2026-07-16 |
| Description | |||
| Summary | Fish Audio S2 Pro text-to-speech. Billed per UTF-8 byte of input text. | xAI Grok STT 1.0 speech-to-text. Billed per second of audio. | Deepgram Aura-2 text-to-speech for real-time voice applications. Billed per input character. |