GLM 5.3 Flash Think Search
GLM 5.3 Flash Think Search is a language model from Z.ai (Zhipu AI). It is currently free at 1 provider with up to 1M tokens of context. The model supports step-by-step reasoning, is suited to coding, supports tool calling. Its weights are open, so it can also run locally.
- Developer
- Z.ai (Zhipu AI)
- Context
- 1M tokens
- Type
- Text
- License
- Open weights
Where to use GLM 5.3 Flash Think Search for free
Each row is a separate free endpoint with its own limits.
Quick start
curl https://api.unorouter.com/v1/chat/completions \
-H "Authorization: Bearer $UNOROUTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "glm-5.3-flash-think-search:free",
"messages": [{"role": "user", "content": "Hello!"}]
}'from openai import OpenAI
client = OpenAI(
base_url="https://api.unorouter.com/v1",
api_key="YOUR_UNOROUTER_API_KEY",
)
reply = client.chat.completions.create(
model="glm-5.3-flash-think-search:free",
messages=[{"role": "user", "content": "Hello!"}],
)
print(reply.choices[0].message.content)import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://api.unorouter.com/v1",
apiKey: process.env.UNOROUTER_API_KEY,
});
const reply = await client.chat.completions.create({
model: "glm-5.3-flash-think-search:free",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(reply.choices[0].message.content);Example for UnoRouter. Any OpenAI-compatible client works: Cursor, Cline, OpenCode, Open WebUI.
Benchmarks
This model is not on the Artificial Analysis leaderboard yet. We do not publish our own estimates.
Similar free models
FAQ
Is GLM 5.3 Flash Think Search free?
Yes. As of October 24, 2026, GLM 5.3 Flash Think Search is free at UnoRouter. Each provider has its own limits — see the table above.
What is the context window of GLM 5.3 Flash Think Search?
The largest context among free routes is 1,000,000 tokens. Some providers cap it lower.
How do I call GLM 5.3 Flash Think Search via API?
Use any OpenAI-compatible client with base URL https://api.unorouter.com/v1, model ID glm-5.3-flash-think-search:free, and a UnoRouter key.
Is GLM 5.3 Flash Think Search open-weight?
Yes, the weights are published — you can download and run it locally, for example with Ollama or LM Studio.