Availability as of 2 Nov 2026
Z.ai
GLM-5.3 Flash 1M
GLM-5.3 Flash 1M is an open-weight vision and language model for application builders. Writing and explaining code for development workflows.
GLM-5.3 Flash with the full 1M window: reasoning, tool calling and image input.
glm-5.3-flash-1m- Input / output per 1M
- ₹15.92 / ₹51.18
- Hosting
- India‑hosted
- Context
- 1M
- Modalities
- text, image
What can I build with GLM-5.3 Flash 1M?
- Writing and explaining code for development workflows.
- Agent workflows that use model-supported tools.
- Working through questions that need multi-step reasoning.
- Understanding images alongside text prompts.
Plan the integration with the API quickstart, compare rupee pricing and explore applications for your team.
How do I make a request?
Use glm-5.3-flash-1m as the model ID with your IndicStack API key.
from openai import OpenAI
import os
client = OpenAI(
base_url="https://api.indicstack.ai/v1",
api_key=os.environ["INDICSTACK_API_KEY"],
)
response = client.chat.completions.create(
model="glm-5.3-flash-1m",
messages=[{"role": "user", "content": "Explain what an API is."}],
)
print(response.choices[0].message.content)
import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://api.indicstack.ai/v1",
apiKey: process.env.INDICSTACK_API_KEY,
});
const response = await client.chat.completions.create({
model: "glm-5.3-flash-1m",
messages: [{ role: "user", content: "Explain what an API is." }],
});
console.log(response.choices[0].message.content);
curl https://api.indicstack.ai/v1/chat/completions \
-H "Authorization: Bearer $INDICSTACK_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "glm-5.3-flash-1m",
"messages": [{"role": "user", "content": "Explain what an API is."}]
}'
Which modalities does GLM-5.3 Flash 1M support?
GLM-5.3 Flash 1M supports text, image. Choose the request format appropriate to these inputs when planning your application.
Where is GLM-5.3 Flash 1M hosted?
GLM-5.3 Flash 1M is labelled India‑hosted, with inference on GPUs in India.
What is GLM-5.3 Flash 1M best suited for?
GLM-5.3 Flash 1M: Writing and explaining code for development workflows. Agent workflows that use model-supported tools. Working through questions that need multi-step reasoning. Understanding images alongside text prompts.
How much does GLM-5.3 Flash 1M cost?
GLM-5.3 Flash 1M costs ₹15.92 per 1M input tokens and ₹51.18 per 1M output tokens, before GST.
What is the served context for GLM-5.3 Flash 1M?
GLM-5.3 Flash 1M has a confirmed served 1M context window. This is the same GLM-5.3 Flash model with the full 1M window, including reasoning, tool calling and image input.
How do I call GLM-5.3 Flash 1M from my application?
Set the model field to glm-5.3-flash-1m with the IndicStack base URL and your API key. The code tabs on this page show requests for GLM-5.3 Flash 1M.
Build with GLM-5.3 Flash 1M.
Review the model capabilities and API integration before your first request.