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GLM model on ScaleMax

GLM 5.3 Flash API

Call GLM 5.3 Flash with the model ID glm-5.3-flash through ScaleMax's OpenAI-compatible API. It costs $0.1875 per million input tokens and $0.625 per million output tokens, prepaid, with no subscription.

Lowest price · Reads images · 1M context

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Model ID
glm-5.3-flash
Maker
GLM
Input / 1M tokens
$0.1875
Output / 1M tokens
$0.625
Context window
1,048,576 tokens
Max output
Not published

GLM 5.3 Flash pricing

ScaleMax publishes one customer rate per model and deducts each completed request from your prepaid balance at that rate: $0.1875 per 1M input tokens and $0.625 per 1M output tokens for GLM 5.3 Flash.

What typical requests cost at the standard rate (token counts are illustrative sizes):

RequestSizeCost per requestPer $25 of credit
Chat reply2,000 tokens in, 600 out$0.00075about 33,333 requests
Coding-agent step40,000 tokens in (files + history), 2,000 out$0.00875about 2,857 requests
Long-document pass200,000 tokens in, 4,000 out$0.04about 625 requests

The Starter credit pack costs $2.50 and adds $25 of usage credit (larger packs add more per dollar — see how pricing works). Prompt-cache reads, where the model supports caching, can bill below the input rate.

Pay by UPI, PayU or Cashfree (UPI, cards, net banking), Cryptomus (crypto) or PayPal. Prices on this page are in US dollars; India checkout shows rupees. See what ₹1,000 buys for token packs.

How to call GLM 5.3 Flash

Create a key in the dashboard, export it as SCALEMAX_API_KEY, and send glm-5.3-flash as the model. OpenAI-compatible clients use the base URL https://api.scalemax.pro/v1. Token pack keys use /token/v1 instead of /v1.

curl · Chat Completions
curl https://api.scalemax.pro/v1/chat/completions \
  -H "Authorization: Bearer $SCALEMAX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "glm-5.3-flash",
    "messages": [{"role": "user", "content": "Explain this error in one line."}],
    "max_tokens": 300
  }'
Python · OpenAI SDK
import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.scalemax.pro/v1",
    api_key=os.environ["SCALEMAX_API_KEY"],
)

reply = client.chat.completions.create(
    model="glm-5.3-flash",
    messages=[{"role": "user", "content": "Explain this error in one line."}],
    max_tokens=300,
)
print(reply.choices[0].message.content)
Node · OpenAI Responses API
import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.scalemax.pro/v1",
  apiKey: process.env.SCALEMAX_API_KEY,
});

const response = await client.responses.create({
  model: "glm-5.3-flash",
  input: "Explain this error in one line.",
  max_output_tokens: 300,
});
console.log(response.output_text);

Keep the key server-side. Call GET /v1/models with your key to see every model it can use; the quick start covers errors and streaming.

Capabilities and limits

  • Context window: 1,048,576 tokens (1.05M-token).
  • Maximum output: not published in the catalogue.
  • Supports: Reads images, Tool / function calling, Reasoning effort control, Responses API.
  • Streaming: server-sent events on every route.

Other versions of GLM 5.3 Flash

These IDs are other versions of the same model. Each is billed at its own rate:

  • glm-5.3-flash-v2 — $0.1875 in / $0.625 out per 1M
  • glm-5.3-flash-v3 — $0.1875 in / $0.625 out per 1M

Works in

Any OpenAI-compatible client: Cursor, Cline, Roo Code, Kilo Code, OpenCode, Continue, Aider, Zed and Hermes Agent, with the model ID above. Setup steps for each are on the integrations page.

Other GLM models

ModelModel IDInput / 1MOutput / 1MContext
GLM 5.3 Flashglm-5.3-flash$0.1875$0.6251,048,576
GLM 5.1glm-5.1$1.925$3.828200,000
GLM 5.2 v2glm-5.2-v2$1.75$5.50—
GLM 5.3 (v2)glm-5.3-v2$1.75$5.50—

Lower-cost alternatives

Models from other makers with a lower output rate. Quality differs by task — test on your own prompts before switching.

ModelModel IDInput / 1MOutput / 1MContext
Hunyuan 3hunyuan-3$0.20$0.60200,000
Hunyuan 4hy4$0.20$0.60—
Kimi K2.6kimi-k2.6$0.20$0.60262,144

All models, with their IDs and rates, are on the model list.

GLM 5.3 Flash API questions

What is the API model ID for GLM 5.3 Flash?

Use glm-5.3-flash. Send it as the "model" field to https://api.scalemax.pro/v1/chat/completions.

How much does the GLM 5.3 Flash API cost?

$0.1875 per 1M input tokens and $0.625 per 1M output tokens at the published ScaleMax rate. A Pay as you go key is prepaid: each completed request is deducted from your credit.

What is the context window of GLM 5.3 Flash?

1,048,576 tokens.

Can I use GLM 5.3 Flash in Cursor, Cline or Roo Code?

Yes. Add ScaleMax as an OpenAI-compatible provider with the base URL https://api.scalemax.pro/v1 and the model ID glm-5.3-flash. Your key must include this model.

Can I pay for GLM 5.3 Flash from India in rupees?

Yes. ScaleMax is prepaid and checkout accepts UPI, cards and net banking in INR, as well as crypto. There is no subscription.

Use GLM 5.3 Flash in your tools

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