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 | Universal-3.5 Prouniversal-3-5-pro | Gemini 3.5 Transcribegemini-3.5-transcribe | o4 Mini Deep Researcho4-mini-deep-research |
|---|---|---|---|
| Pricing | |||
| Input | $0 / 1M | $0 / 1M | $2.00 / 1M |
| Output | $0 / 1M | $0 / 1M | $8.00 / 1M |
| Cache Write (5m) | Not applicable | Not applicable | $2.00 / 1M |
| Cache Write (1h) | Not applicable | Not applicable | $2.00 / 1M |
| Cache Read | Not applicable | Not applicable | $2.00 / 1M |
| Web Search | $0 / 1M | $0 / 1M | $0 / 1M |
| Context | |||
| Max context | N/A | 98.3K | 200K |
| Max output | N/A | N/A | N/A |
| Capabilities | |||
| Vision | No | Yes | Yes |
| Function Calling | No | Yes | Yes |
| JSON Mode | No | No | Yes |
| Streaming | No | No | Yes |
| Catalogue | |||
| Provider | AssemblyAI | OpenAI | |
| Category | voice | voice | chat |
| Charge type | Pay As You Go | Pay As You Go | Pay As You Go |
| Released | 2026-09-22 | 2026-09-25 | — |
| Description | |||
| Summary | AssemblyAI Universal-3.5 Pro speech-to-text. Billed per second of audio. | Google Gemini 3.5 Transcribe speech-to-text. Billed per input and output token. | o4-mini-deep-research is a faster, lower-cost version of OpenAI's deep-research model, designed for complex, multi-step investigations. It automatically relies on web_search for information gathering, which always adds extra usage cost. |