GLM-5.3

by Z.ai

zai/glm-5.3

The current GLM flagship for software engineering and agent workloads, with configurable reasoning effort.

Modalities
Text
In / out per 1M
$1.40 / $4.40
Context
1M
Released
Aug 18, 2026

Overview

The current GLM flagship for software engineering and agent workloads, with configurable reasoning effort. It is billed from the same balance as every other model and API here, and the price of each call comes back in the response.

Pricing

The default plan, in USD per million tokens.

MeterPer 1M tokens
Input$1.40
Output$4.40
Cache read$0.26
Cache write$1.40

Your balance and per-call records come from /v1/credits and /v1/generation.

Use it

Point your client at the gateway and pass this model id. Nothing else changes.

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://gateway.agentsky.dev/v1",
  apiKey: process.env.AGENTSKY_API_KEY, // ast_…
});

const completion = await client.chat.completions.create({
  model: "zai/glm-5.3",
  messages: [{ role: "user", content: "Summarise this ticket." }],
});
console.log(completion.usage.cost); // USD, in the response

Questions

GLM-5.3 — AgentSky