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GLM model on ScaleMax

GLM 5.1 API

Call GLM 5.1 with the model ID glm-5.1 through ScaleMax's OpenAI-compatible API. It costs $1.925 per million input tokens and $3.828 per million output tokens, prepaid, with no subscription.

Low price · Text only · 200K context

Get an API keySee the code
Model ID
glm-5.1
Maker
GLM
Input / 1M tokens
$1.925
Output / 1M tokens
$3.828
Context window
200,000 tokens
Max output
128,000 tokens

GLM 5.1 pricing

ScaleMax publishes one customer rate per model and deducts each completed request from your prepaid balance at that rate: $1.925 per 1M input tokens and $3.828 per 1M output tokens for GLM 5.1.

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$0.00615about 4,067 requests
Coding-agent step40,000 tokens in (files + history), 2,000 out$0.085about 295 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 5.1

Create a key in the dashboard, export it as SCALEMAX_API_KEY, and send glm-5.1 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-5.1",
    "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-5.1",
    messages=[{"role": "user", "content": "Explain this error in one line."}],
    max_tokens=300,
)
print(reply.choices[0].message.content)

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: 200,000 tokens (200K-token).
  • Maximum output: 128,000 tokens per response.
  • Supports: Tool / function calling, Reasoning effort control.
  • Streaming: server-sent events on every route.

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 5.1glm-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—
GLM 5.3 Flashglm-5.3-flash$0.1875$0.6251,048,576

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
Gemini 3.8 Flashgemini-3.8-flash$0.75$3.751,050,000
GPT-5.6 Lunagpt-5.6-luna$0.522$3.1321,050,000
Gemini 3 Flash Previewgemini-3-flash-preview$0.50$31,050,000

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

GLM 5.1 API questions

What is the API model ID for GLM 5.1?

Use glm-5.1. Send it as the "model" field to https://api.scalemax.pro/v1/chat/completions.

How much does the GLM 5.1 API cost?

$1.925 per 1M input tokens and $3.828 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 5.1?

200,000 tokens, with up to 128,000 output tokens per response.

Can I use GLM 5.1 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-5.1. Your key must include this model.

Can I pay for GLM 5.1 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 5.1 in your tools

Start calling GLM 5.1

Get a prepaid key, copy the model ID, and send your first request in a couple of minutes.

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