GLM 4.5

by Z.ai

Zero data retentionRetiring
z-ai/glm-4.5
Input
$0.84/1M tokens
Output
$3.08/1M tokens
Context
131Ktokens
Max output
98Ktokens
Knows to
December 2024
Released
25 Jul 2025

Scheduled for retirement on 31 Dec 2026. Requests to z-ai/glm-4.5 will stop working after that date; the comparisons below are a good place to pick a successor.

About

GLM-4.5 is our latest flagship foundation model, purpose-built for agent-based applications. It leverages a Mixture-of-Experts (MoE) architecture and supports a context length of up to 128k tokens.

Pricing

Input$0.84per 1M prompt tokens
Output$3.08per 1M generated tokens, reasoning included
Cached input$0.15per 1M tokens read back from the prompt cache

What a request costs

Typical requestEachPer 1,000
Short chat reply1,500 in · 400 out$0.0025$2.49
Question over a long document40,000 in · 800 out$0.036$36.06
Agent tool step20,000 in · 1,200 out$0.020$20.50

At the developer-API rate, before any provider promotion or prompt-cache saving. In the app, the model picker shows what a message costs on your plan before you send it.

Benchmarks

Intelligence12.8#187 of 285

Head-to-head rankings

  1. #593DModel arenaElo 117160% wins
  2. #61SVGModel arenaElo 109451% wins
  3. #72Game devModel arenaElo 114854% wins
  4. #75CodeModel arenaElo 116754% wins
  5. #77Data vizModel arenaElo 116053% wins
  6. #77WebsitesModel arenaElo 117154% wins
  7. #78UI componentsModel arenaElo 114355% wins

Scores from Artificial Analysis; bars are scaled to the best model on our list. Rankings from Design Arena head-to-head votes. Published by OpenRouter alongside its catalogue.

Call it from code

OpenAI-compatible: point any OpenAI SDK at https://api.privateer.pro/v1 and set model. Keys are created in the app under Settings.

cURL
curl https://api.privateer.pro/v1/chat/completions \
  -H "Authorization: Bearer $PRIVATEER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "z-ai/glm-4.5",
    "messages": [{ "role": "user", "content": "Hello" }]
  }'
Python
import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.privateer.pro/v1",
    api_key=os.environ["PRIVATEER_API_KEY"],
)
reply = client.chat.completions.create(
    model="z-ai/glm-4.5",
    messages=[{"role": "user", "content": "Hello"}],
)
print(reply.choices[0].message.content)
JavaScript
import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.privateer.pro/v1",
  apiKey: process.env.PRIVATEER_API_KEY,
});
const reply = await client.chat.completions.create({
  model: "z-ai/glm-4.5",
  messages: [{ role: "user", content: "Hello" }],
});
console.log(reply.choices[0].message.content);

Parameters this model accepts

include_reasoningmax_tokensreasoningresponse_formattemperaturetool_choicetoolstop_ktop_p

API reference → · How API billing works →

Prices are USD at the developer-API rate, as of 16 Oct 2026, rebuilt daily from the providers’ live catalogues. ← All models