A side-by-side comparison of GPT-6.1 Terra and Kimi K3.1 Pro Highspeed: input/output pricing, capabilities and available endpoints, served live from 5699.ai. Both are reachable with the same API key.
| Item | GPT-6.1 Terra | Kimi K3.1 Pro Highspeed |
|---|---|---|
| Input (per 1M tokens) | $0.65 | $2.2 |
| Output (per 1M tokens) | $3.25 | $11 |
| Cache read explicit (per 1M tokens) | $0.0325 | $0.11 |
| Cache write 5m (per 1M tokens) | $0.8125 | $2.2 |
| Item | GPT-6.1 Terra | Kimi K3.1 Pro Highspeed |
|---|---|---|
| Context window | 922,000 | — |
| Max output | 128,000 | — |
| Item | GPT-6.1 Terra | Kimi K3.1 Pro Highspeed |
|---|---|---|
| function_calling | Yes | Yes |
| input_video | — | Yes |
| prompt_caching | Yes | — |
| structured_output | — | Yes |
| thinking | — | Yes |
| vision | Yes | Yes |
On input, GPT-6.1 Terra is cheaper ($0.65 vs $2.2 per 1M tokens). On output, GPT-6.1 Terra is cheaper ($3.25 vs $11 per 1M tokens). All prices are per million tokens in USD.
both support function_calling, vision; only GPT-6.1 Terra supports prompt_caching; only Kimi K3.1 Pro Highspeed supports input_video, structured_output, thinking.
Yes. Both are available on 5699.ai through one API key and the same OpenAI-compatible endpoint — switching means changing the model field from "gpt-6.1-terra" to "kimi-k3.1-pro-highspeed", nothing else.
Both are available on 5699.ai under one API key — switching between them means changing the model field and nothing else, so you can use each where it fits rather than picking one.