GLM-5.3

GLM-5.3 on APIYI: $1.4 input /$4.396 output per 1M tokens, 1,000,000 context, 128,000 max output, available in 2 billing groups.

Same 753B MoE base as 5.2 with post-training scaled up: +50% on Z.ai Code Bench and doubled cyber-defense scores; thinking is always on, built for coding agents and security audits.

Specifications

Item	Value
Model ID	glm-5.3
Vendor	Zhipu
Vendor release	2026-08-14
Available on APIYI	2026-09-08
Knowledge cutoff	Not disclosed
Input modalities	Text
Output modalities	Text
Context window	1,000,000 tokens
Max output	128,000 tokens
Billing	Usage-based

Pricing

Prices in USD per 1M tokens ($/1M).

Input	Cached input	Output
$1.4	$0.259	$4.396

The table shows list prices. Recharge promotions and group discounts stack; the console reflects the actual charge in real time. See Pricing and Recharge promotions.

Endpoints

Endpoint	Path	Supported
OpenAI Chat Completions	POST /v1/chat/completions	✅
OpenAI Responses	POST /v1/responses	—
Anthropic Messages	POST /v1/messages	—
Gemini Generate Content	POST /v1beta/models/{model}:generateContent	—
Image Generations	POST /v1/images/generations	—
Embeddings	POST /v1/embeddings	—

Billing groups

Group	Multiplier	Notes
Default	1×	List price
SVIP	1×	List price

Some groups carry extra discounts, stackable with recharge bonuses. See Tokens and groups.

Supported features

Feature	Supported
Streaming	✅
Tool calling	✅
Structured outputs	✅
Prompt caching	✅
Extended thinking	On by default

Example request

The example below calls glm-5.3 through OpenAI Chat Completions (/v1/chat/completions). Point base_url at https://api.apiyi.com/v1 — everything else matches the official API.

curl https://api.apiyi.com/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $APIYI_API_KEY" \
  -d '{
    "model": "glm-5.3",
    "messages": [{"role": "user", "content": "Hello"}]
  }'

Read the key from an environment variable, never hard-coded. In production, issue separate tokens per use case so you can revoke and attribute usage individually.

Related docs

Launch announcement

Background, benchmarks and migration notes for GLM-5.3

GLM-5.3-Flash

Details for a model in the same family

GLM-5.2

Details for a model in the same family

Model pricing directory

Live pricing, endpoints and groups for all 299 models

Specs on this page are maintained by hand in models/data/model-details.json; pricing and endpoints come from the live pricing API, updated 2026-09-08 23:00 (UTC+8), specs last verified 2026-09-08.