Z.aiReasoning Model

GLM-5.3 Flash

Z.ai's GLM-5.3 Flash: a fast open-weight reasoning model with image input, a 1M-token context, and 131K max output. Reasoning effort is selectable from none through max, with prompt caching for high-volume agentic and coding workloads.

import OpenAI from "openai";

const openai = new OpenAI({
  baseURL: "https://api.inference.net/v1",
  apiKey: "<YOUR_API_KEY>",
});

const completion = await openai.chat.completions.create({
  model: "glm-5.3-flash",
  messages: [
    {
      role: "user",
      content: "What is the meaning of life?"
    }
  ],
  stream: true,
});

for await (const chunk of completion) {
  process.stdout.write(chunk.choices[0]?.delta.content as string);
}

import OpenAI from "openai";

const openai = new OpenAI({
  baseURL: "https://api.inference.net/v1",
  apiKey: "<YOUR_API_KEY>",
});

const completion = await openai.chat.completions.create({
  model: "glm-5.3-flash",
  messages: [
    {
      role: "user",
      content: "What is the meaning of life?"
    }
  ],
  stream: true,
});

for await (const chunk of completion) {
  process.stdout.write(chunk.choices[0]?.delta.content as string);
}

Related models

Model

InputCache readOutput

Kimi K3

1024K input contextVisionToolsReasoning$2.10 / $10.95

256K input contextTools$0.102 / $0.48

125K input context$0.05 / $0.23

$0.05

$0.23

Schematron V2 Turbo

125K input context$0.03 / $0.15

$0.03

$0.15

Start building with GLM-5.3 Flash today

Serverless, OpenAI-compatible, and billed per token. No commitments.