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GLM-5.3

GLM-5.3

Z.AI's GLM-5.3 flagship model for coding, reasoning, and agentic workloads.

TextReasoningCoding

Input

$1.4

Per 1M tokens

Cached Input

$0.26

Per 1M tokens

Output

$4.4

Per 1M tokens

Model Codeglm-5.3

Playground

glm-5.3

No output yet

Pricing

ModelInputCached InputOutput
GLM-5.3$1.4 / 1M tokens$0.26 / 1M tokens$4.4 / 1M tokens

Prices are shown in USD per 1M tokens.

README

GLM-5.3 is Z.AI's latest flagship text model with always-on reasoning, a 1M-token context window, and up to 128K output tokens.
  • GLM-5.3 always runs with reasoning enabled (low / high / max) and delivers strong gains in complex coding and long-horizon agentic tasks.
  • Served through the Claude Messages API (POST /v1/messages), the same low-friction path as GLM-5.2.
  • Cached input pricing reduces cost for repeated prompts, templates, and policy-heavy workloads.

API

Use the API docs for request format, parameters, and integration details.

Z.AI's GLM-5.3 flagship model for coding, reasoning, and agentic workloads.

Model Code

glm-5.3

View API Docs

API

Endpoint

POST /v1/messages

Authentication

Authorization: Bearer YOUR_REACH_API_KEY
anthropic-version: 2023-06-01
Content-Type: application/json

Example

curl -X POST "https://direct.reachapi.ai/v1/messages" \
  -H "Authorization: Bearer YOUR_REACH_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "YOUR_MODEL_ID",
    "messages": [
      {
        "role": "user",
        "content": "Introduce ReachAPI in one sentence."
      }
    ],
    "max_tokens": 512,
    "temperature": 0.2
  }'

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