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 | Grok STT 1.0grok-stt-1.0 | S2.1 Pros2.1-pro | Perceptron Mk1.5perceptron-mk1.5 |
|---|---|---|---|
| Pricing | |||
| Input | $0 / 1M | $0 / 1M | $0.15 / 1M |
| Output | $0 / 1M | $0 / 1M | $1.50 / 1M |
| Cache Write (5m) | Not applicable | Not applicable | $0.15 / 1M |
| Cache Write (1h) | Not applicable | Not applicable | $0.15 / 1M |
| Cache Read | Not applicable | Not applicable | $0.15 / 1M |
| Web Search | $0 / 1M | $0 / 1M | $0 / 1M |
| Context | |||
| Max context | N/A | N/A | 36.9K |
| 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 | Yes |
| Catalogue | |||
| Provider | xAI | Fish Audio | Perceptron |
| Category | voice | voice | chat |
| Charge type | Pay As You Go | Pay As You Go | Pay As You Go |
| Released | 2026-07-23 | 2026-07-29 | 2026-09-25 |
| Description | |||
| Summary | xAI Grok STT 1.0 speech-to-text. Billed per second of audio. | Fish Audio S2.1 Pro text-to-speech. Billed per UTF-8 byte of input text. | Perceptron Mk1.5 chat model that accepts audio input. Audio and text input are billed per token. |