GLM-5.3-Flash on Gonka
Z.ai's efficient open-source model for coding and agents.
Z.ai
What is GLM-5.3-Flash?
GLM is Z.ai's open-source model family with a strong focus on agentic workflows, tool calling, and coding. On Gonka you run the GLM-5.3-Flash release, the fast and efficient tier of the line.
It serves a 400,000-token context and reasons by default, returning its thinking in a separate reasoning field, all through the same OpenAI-compatible endpoint as every other model.
What GLM-5.3-Flash is best for
Coding
Code generation and editing across common languages.
Agentic applications
Built with tool calling and multi-step agent workflows in mind.
Long-context tasks
A 400K window for large codebases and document sets in a single request.
High-volume workloads
One of the lowest-priced chat models in the catalog, suited for bulk processing and cost-sensitive products.
Key specs
- Context window
- 400K tokens
- Max output
- 16K tokens
- Quantization
- FP8
- Modalities
- Text in · text out
- Features
- Tool calling, Reasoning
- Model ID
- zai-org/GLM-5.3-Flash
Pricing in USD
1M cached input tokens for just $0.020
The same price for your prompt and the model's reply. Your USD rate is locked in when you top up, and it won't change until you've used the balance. No crypto, wallets, or tokens.
Or try GLM-5.3-Flash free: the monthly free tier covers about 1.2M tokens of this model. No card required.
How to use the GLM-5.3-Flash API
The GLM-5.3-Flash API on Gonka works with both OpenAI and Anthropic clients. Point any OpenAI client at https://proxy.gonkabroker.com/v1,
use your gnk-prx- key, and set the model to
zai-org/GLM-5.3-Flash.
from openai import OpenAI
client = OpenAI(
base_url="https://proxy.gonkabroker.com/v1",
api_key="gnk-prx-YOUR_KEY_HERE",
)
resp = client.chat.completions.create(
model="zai-org/GLM-5.3-Flash",
messages=[{"role": "user", "content": "Hello!"}],
)
print(resp.choices[0].message.content)import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://proxy.gonkabroker.com/v1",
apiKey: "gnk-prx-YOUR_KEY_HERE",
});
const resp = await client.chat.completions.create({
model: "zai-org/GLM-5.3-Flash",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(resp.choices[0].message.content);curl https://proxy.gonkabroker.com/v1/chat/completions \
-H "Authorization: Bearer gnk-prx-YOUR_KEY_HERE" \
-H "Content-Type: application/json" \
-d '{
"model": "zai-org/GLM-5.3-Flash",
"messages": [{"role": "user", "content": "Hello!"}]
}'Using the Anthropic SDK? See the Anthropic-compatible setup.
How to create a Gonka API keyUse GLM-5.3-Flash in Claude Code
GLM-5.3-Flash is verified as an engine for a Claude Code agent: the full tool-use loop, streaming, and multi-turn sessions work through our Anthropic-compatible API. Export three variables and start your agent as usual.
export ANTHROPIC_BASE_URL="https://proxy.gonkabroker.com"
export ANTHROPIC_AUTH_TOKEN="gnk-prx-YOUR_KEY_HERE"
export ANTHROPIC_MODEL="zai-org/GLM-5.3-Flash"
claudeRun GLM-5.3-Flash on Gonka
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