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 | GPT-6 Astragpt-6-astra |
|---|---|---|
| Pricing | ||
| Input | $0 / 1M | $10.00 / 1M |
| Output | $0 / 1M | $50.00 / 1M |
| Cache Write (5m) | Not applicable | $10.00 / 1M |
| Cache Write (1h) | Not applicable | $10.00 / 1M |
| Cache Read | Not applicable | $10.00 / 1M |
| Web Search | $0 / 1M | $0 / 1M |
| Context | ||
| Max context | N/A | 1M |
| Max output | N/A | N/A |
| Capabilities | ||
| Vision | No | Yes |
| Function Calling | No | Yes |
| JSON Mode | No | Yes |
| Streaming | No | Yes |
| Catalogue | ||
| Provider | AssemblyAI | OpenAI |
| Category | voice | chat |
| Charge type | Pay As You Go | Pay As You Go |
| Released | 2026-09-22 | — |
| Description | ||
| Summary | AssemblyAI Universal-3.5 Pro speech-to-text. Billed per second of audio. | GPT-6 Astra is OpenAI's flagship model for demanding end-to-end professional work, designed for advanced analysis, software engineering, deep research, scientific tasks, and document creation. It is particularly strong in long-horizon agentic workflows, including tasks that require sustained reasoning, tool orchestration, and computer and browser use, making it well suited for complex autonomous workflows and production-grade knowledge work. |