# GLM-4.6V-FlashX > GLM-4.6V-FlashX is a lightweight, high-speed and affordable Z.ai vision-language model with native function calling. ## Key facts - Model author: Z.ai - Input: $0.04 per 1M tokens - Output: $0.40 per 1M tokens - Cached input: $0.004 per 1M tokens - Context window: 128,000 tokens - Input modalities: image, text, video - Output modalities: text - Capabilities: tools, vision - Model IDs: `z-ai/glm-4.6v-flashx` - Model page: https://www.realrelay.ai/model/z-ai/glm-4.6v-flashx ## Overview GLM-4.6V-FlashX is a lightweight, high-speed and affordable multimodal model from Z.ai. It supports native function calling and offers a thinking mode switch. It is designed for visual tasks that run at volume and need quick answers at a low price. GLM-4.6V-FlashX has a 128K-token context window. It accepts text, image and video input and returns text output. ## Capabilities GLM-4.6V-FlashX supports tool calling and visual understanding. Z.ai positions it on three traits: lightweight, high speed and low price. ## Pricing GLM-4.6V-FlashX costs $0.04 per 1M input tokens and $0.40 per 1M output tokens. Cache reads cost $0.004 per 1M tokens. GLM-4.6V-FlashX is available through RealRelay's OpenAI-compatible API. ## Use cases Use GLM-4.6V-FlashX for high-volume image understanding, such as describing pictures, reading screenshots or answering questions about uploaded images, at a low price per request. Native function calling lets it hand extracted details to other systems, and video input extends the same workflow to moving footage, all with a 128K-token context window. ## Call it OpenAI-compatible chat completions: ```bash curl https://www.realrelay.ai/v1/chat/completions \ -H "Authorization: Bearer $REALRELAY_API_KEY" \ -H "Content-Type: application/json" \ -d '{"model": "z-ai/glm-4.6v-flashx", "messages": [{"role": "user", "content": "Hello"}]}' ``` ## FAQ ### What is GLM-4.6V-FlashX? GLM-4.6V-FlashX is a lightweight, high-speed and affordable Z.ai vision-language model with native function calling. ### How much does GLM-4.6V-FlashX cost? GLM-4.6V-FlashX costs $0.04 per 1M input tokens and $0.40 per 1M output tokens, with cache reads at $0.004 per 1M tokens. ### What is the context window of GLM-4.6V-FlashX? GLM-4.6V-FlashX has a 128K-token context window. ### What inputs and outputs does GLM-4.6V-FlashX support? GLM-4.6V-FlashX accepts text, image and video input and returns text output. ### Does GLM-4.6V-FlashX support tool calling? Yes. GLM-4.6V-FlashX supports tool calling, along with visual understanding. ### How do I call GLM-4.6V-FlashX via the API? Send requests to RealRelay's OpenAI-compatible API and use the model ID z-ai/glm-4.6v-flashx.