Z.AI · Single modalityReleased 2026-08-18

glm-5.3

zai/glm-5.3 id

GLM 5.3 delivers comprehensive advancements in complex software engineering and agent capabilities. It uses the same base model as GLM-5.2, with all improvements driven by post-training.

Tool useReasoningStructured output

Type

Use glm-5.3

# Drop-in OpenAI-compatible client
$ import { generateText } from 'ai'
$ 
$ const { text } = await generateText({
$   model: 'zai/glm-5.3',
$   baseURL: 'https://synapse.garden/api/v1',
$   apiKey: process.env.MG_KEY,
$   prompt: 'Why is the sky blue?',
$ })

CONTEXT WINDOW

MAX OUTPUT

$1.54/M

INPUT · PER M

$4.84/M

OUTPUT · PER M

PRICING

List prices, every modality.

Rate	Per million tokens · USD
Input	$1.54/M
Output	$4.84/M
Cache read	$0.154/M

Honest list pricesHow we calculate prices

Other Z.AI models

See all 17

Model

Input

Output

Context

Type

FAQ · GLM-5.3

Frequently asked

01 / 04

How do I call glm-5.3 from my code?

Use the OpenAI or Anthropic SDK and point baseURL at https://synapse.garden/api/v1. Set model: ‘zai/glm-5.3’ and supply your Synapse Garden API key. No code changes beyond the base URL.

02 / 04

How much does glm-5.3 cost?

Input: $1.54/M per million tokens. Output: $4.84/M per million tokens. The free tier includes a million tokens every month at no cost.

03 / 04

What's the context window for glm-5.3?

glm-5.3 supports a context window of 1M tokens, with a maximum output of 1M tokens.

04 / 04

Do I need a separate Anthropic or OpenAI account?

No. Synapse Garden is the single API surface — one key gives you OpenAI, Anthropic, Google, Meta, Mistral, DeepSeek, xAI, Cohere, and more. Billing, rate limits, and audit logs are unified.

READY

Try glm-5.3 in three minutes.

Sign up, create a key, drop our base URL into your existing client. The free tier includes a million tokens every month — no credit card.

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