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 | GPT-5.6 Terra Progpt-5.6-terra-pro | Perceptron Mk1.5perceptron-mk1.5 | Universal-3.5 Prouniversal-3-5-pro |
|---|---|---|---|
| Pricing | |||
| Input | $2.00 / 1M | $0.15 / 1M | — Not priced per input token |
| Output | $12.00 / 1M | $1.50 / 1M | — Not priced per output token |
| Cache Write (5m) | $2.00 / 1M | $0.15 / 1M | Not applicable |
| Cache Write (1h) | $2.00 / 1M | $0.15 / 1M | Not applicable |
| Cache Read | $2.00 / 1M | $0.15 / 1M | Not applicable |
| Web Search | $0 / 1M | $0 / 1M | $0 / 1M |
| Context | |||
| Max context | 1M | 36.9K | N/A |
| Max output | N/A | N/A | N/A |
| Capabilities | |||
| Vision | Yes | No | No |
| Function Calling | Yes | No | No |
| JSON Mode | Yes | No | No |
| Streaming | Yes | Yes | No |
| Catalogue | |||
| Provider | OpenAI | Perceptron | AssemblyAI |
| Category | chat | chat | voice |
| Charge type | Pay As You Go | Pay As You Go | Pay As You Go |
| Released | — | 2026-09-25 | 2026-09-22 |
| Description | |||
| Summary | GPT-5.6 Terra Pro uses the same underlying model as GPT-5.6 Terra, but runs with reasoning.mode set to pro to deliver higher-quality responses on complex tasks. Optimized for deeper reasoning and greater reliability, it is well suited for advanced coding, multi-step reasoning, and agentic workflows where improved accuracy and solution quality are more important than maximizing speed or minimizing cost. | Perceptron Mk1.5 chat model that accepts audio input. Audio and text input are billed per token. | AssemblyAI Universal-3.5 Pro speech-to-text. Billed per second of audio. |