# kimi-k3.1-pro-highspeed > The high-speed variant of Kimi K3.1 Pro — same intelligence, about 2-3× the speed. ## Key facts - Model author: Moonshot AI - Price: from $4.00 per 1M input tokens and $20.00 per 1M output tokens (tiered; this is the starting tier) - Context length: 1M tokens - Maximum output: 1M tokens - Input modalities: Text, Image, Video - Output modalities: Text - Capabilities: Reasoning, Tool use - Model IDs: `moonshotai/kimi-k3.1-pro-highspeed` - Model page: https://www.realrelay.ai/model/moonshot-ai/kimi-k3.1-pro-highspeed - API base URL: https://www.realrelay.ai/v1 (OpenAI-compatible) ## How to call it RealRelay.ai serves kimi-k3.1-pro-highspeed through one OpenAI-compatible API. Send a RealRelay.ai API key and set the `model` field to `moonshotai/kimi-k3.1-pro-highspeed`.