Z.ai: GLM 5.3 FlashX

z-ai/glm-5.3-flashx

GLM-5.3-FlashX is the high-speed variant of Z.ai's GLM-5.3-Flash, a native multimodal model delivering inference speeds of up to 200 tokens/s. Built on the same hybrid sparse and linear attention architecture...

Modalities

In / Out Price

$0.37 / $1.25 per 1M

Context

Released

Sep 18, 2026

Knowledge Cutoff

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API

Reroute speaks the OpenAI Chat Completions format. Point any OpenAI SDK at https://reroute.wtf/api/v1 and use z-ai/glm-5.3-flashx as the model.

You need an API key

Keys start with sk-rr-v1- and are shown once.

Create API key

curl https://reroute.wtf/api/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $REROUTE_API_KEY" \
  -d '{
  "model": "z-ai/glm-5.3-flashx",
  "messages": [
    { "role": "user", "content": "What is the meaning of life?" }
  ]
}'

Streaming

Set stream: true to receive server-sent events. The final chunk carries usage and cost.

curl -N https://reroute.wtf/api/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $REROUTE_API_KEY" \
  -d '{ "model": "z-ai/glm-5.3-flashx", "stream": true,
        "messages": [{ "role": "user", "content": "Count to five" }] }'