glm-5.3-flash — API, Pricing & Context Window | Vivgrid

glm-5.3-flash is Zhipu AI's lightweight sibling to glm-5.3. It trades the flagship's coding-benchmark tuning for speed and price, and adds image, video, and audio input — so the same request can reason over text alongside media. It keeps the line's 1M-token context window and 384K-token max output.

On Vivgrid, glm-5.3-flash is reachable through the unified, OpenAI-compatible endpoint, so it integrates cleanly alongside models from OpenAI, Anthropic, Google, and DeepSeek under one API key.

Specifications

Pricing

Pricing in USD per 1M tokens, matching the provider's rates.

Quick start

Call glm-5.3-flash through Vivgrid's unified, OpenAI-compatible endpoint. Get an API key from the Vivgrid Console.

curl https://api.vivgrid.com/v1/chat/completions \
  -H "Authorization: Bearer $VIVGRID_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "glm-5.3-flash",
    "messages": [
      { "role": "user", "content": "Say hello in English, Chinese and Spanish." }
    ],
    "stream": true
  }'

Ideal use cases

• High-volume, cost-sensitive agent traffic that still needs tool calling
• Multimodal steps that mix text with image, video, or audio input
• Whole-repository reasoning within a 1M-token context at low cost
• Draft or first-pass generation ahead of a flagship model's final pass

Related models

• glm-5.3 — the flagship, text-only coding model this is derived from
• glm-5.2 — prior-generation flagship, same price as glm-5.3
• deepseek-v4-flash-vision-exp — alternative low-cost multimodal model