Model Cost Profile

Z.ai: GLM 4.5 Air (free)

Developer: z-ai

Pricing updated Mar 11, 2026

Input rank: #26Output rank: #26

Live Pricing

Input: $0.0000

Output: $0.0000

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Pricing via OpenRouter API · Last synced Mar 11, 2026

Z.ai: GLM 4.5 Air offers a substantial context window of 131072 tokens, making it ideal for applications requiring extensive text analysis or multi-turn dialogue management. As a free model, it eliminates input and output costs, allowing teams to leverage advanced natural language processing capabilities without financial constraints. This model is particularly suitable for startups and research projects that demand high throughput and flexibility in handling large datasets.

🔧 Tool Calling🧠 Reasoning

Context Window

131,072

Tokens

Input Price / 1M

$0.0000

Prompt tokens

Output Price / 1M

$0.0000

Completion tokens

Intelligence (MMLU)

Benchmark Pending

Massive Multitask Language Understanding

Side-by-Side Pricing Table

Usage Type	Price / 1M Tokens
Input (Prompt)	$0.0000
Output (Completion)	$0.0000

Compare with Z.ai: GLM 4.7 Flash Compare with Arcee AI: Trinity Large Preview (free)Compare with Arcee AI: Trinity Mini (free)

Price History

Z.ai: GLM 4.5 Air (free) Pricing Trend

Input / 1M tokensOutput / 1M tokens

Mar 7 — Mar 11

Current Input / 1M

$0.000000

Current Output / 1M

$0.000000

Cost Calculator

Estimate monthly spend for Z.ai: GLM 4.5 Air (free) based on your workload.

Input tokens / month

01.0B

Output tokens / month

0500M

Estimated Monthly Cost

$0.00

25M input + 12M output tokens

Same Workload on Other Models

Arcee AI: Trinity Large Preview (free)$0.00 Arcee AI: Trinity Mini (free)$0.00 Google: Gemma 3 12B (free)$0.00 Google: Gemma 3 27B (free)$0.00

Cheaper Alternatives to Compare

Quick links for cost-down decisions before production rollout.

Z.ai: GLM 4.5 Air (free) vs Arcee AI: Trinity Large Preview (free)Z.ai: GLM 4.5 Air (free) vs Arcee AI: Trinity Mini (free)Z.ai: GLM 4.5 Air (free) vs Google: Gemma 3 12B (free)Z.ai: GLM 4.5 Air (free) vs Google: Gemma 3 27B (free)

FAQ

Common pricing and benchmark questions for Z.ai: GLM 4.5 Air (free).

How much does Z.ai: GLM 4.5 Air (free) cost per 1M input tokens?

Z.ai: GLM 4.5 Air (free) input pricing is $0.0000 per 1M tokens based on the latest synced provider data.

How much does Z.ai: GLM 4.5 Air (free) cost per 1M output tokens?

Z.ai: GLM 4.5 Air (free) output pricing is $0.0000 per 1M tokens based on the latest synced provider data.

What context window does Z.ai: GLM 4.5 Air (free) support?

Z.ai: GLM 4.5 Air (free) supports a context window of 131,072 tokens.

How can I compare Z.ai: GLM 4.5 Air (free) with cheaper alternatives?

Use the comparison links on this page to open direct model-vs-model pricing and benchmark pages, then evaluate monthly spend projections for your workload.