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

Z.ai: GLM 4.5 Air costs $0.130 per 1M input tokens and $0.850 per 1M output tokens on the standard tier. Cached input is $0.025 per 1M.

What is Z.ai: GLM 4.5 Air's context window?

Z.ai: GLM 4.5 Air accepts up to 131,072 tokens in a single request, and can return up to 98,304 output tokens.

Is there a cheaper OpenRouter model than Z.ai: GLM 4.5 Air?

Yes. MythoMax 13B is $0.080 per 1M input tokens versus $0.130 for Z.ai: GLM 4.5 Air, with a 8,192 token context window.

Where does this Z.ai: GLM 4.5 Air price come from?

From the OpenRouter catalogue, because OpenRouter does not publish machine-readable pricing. OpenRouter is a reseller, so its rate can differ from OpenRouter's own — verify before committing spend.

Z.ai: GLM 4.5 Air pricing

GLM-4.5-Air is the lightweight variant of our latest flagship model family, also purpose-built for agent-centric applications. Z.ai: GLM 4.5 Air from OpenRouter costs $0.130 per 1M input tokens and $0.850 per 1M output tokens. Cached input is $0.025 per 1M. Context window 131,072 tokens.

API id z-ai/glm-4.5-air · OpenRouter · source · updated 2026-09-25 · general-purpose

$0.130

Input / 1M tokens

$0.850

Output / 1M tokens

$0.025

Cached input / 1M

131K

Context window

Z.ai: GLM 4.5 Air specifications

Provider: OpenRouter
API id: z-ai/glm-4.5-air
Model type: general-purpose
Context window: 131K tokens
Max output: 98K tokens
Currency: USD
Price source: Provider API
Last checked: 2026-09-25

GLM-4.5-Air across providers

The same model, priced by every seller we track. Ranked by the cost of 1M input + 1M output tokens, standard tier; savings measured against buying from the vendor directly.

Provider	Input /1M	Cached /1M	Output /1M	1M in + 1M out	vs vendor
OpenRouterHostCheapestviewing	$0.130	$0.025	$0.850	$0.98	−25%
Zhipu AI (GLM)Vendor	$0.200	$0.030	$1.10	$1.30	—

What Z.ai: GLM 4.5 Air costs in practice

Estimated cost at common usage volumes
Workload	Input tokens	Output tokens	Estimated cost
Short chat turn	1,000	500	$0.0006
Document summary	50,000	2,000	$0.0082
1M tokens in, 200K out	1,000,000	200,000	$0.30

Estimates use the standard tier and ignore caching discounts, so real bills with repeated prompt prefixes are typically lower.

Common questions

How much does Z.ai: GLM 4.5 Air cost per 1M tokens?: Z.ai: GLM 4.5 Air costs $0.130 per 1M input tokens and $0.850 per 1M output tokens on the standard tier. Cached input is $0.025 per 1M.
What is Z.ai: GLM 4.5 Air's context window?: Z.ai: GLM 4.5 Air accepts up to 131,072 tokens in a single request, and can return up to 98,304 output tokens.
Is there a cheaper OpenRouter model than Z.ai: GLM 4.5 Air?: Yes. MythoMax 13B is $0.080 per 1M input tokens versus $0.130 for Z.ai: GLM 4.5 Air, with a 8,192 token context window.
Where does this Z.ai: GLM 4.5 Air price come from?: From the OpenRouter catalogue, because OpenRouter does not publish machine-readable pricing. OpenRouter is a reseller, so its rate can differ from OpenRouter's own — verify before committing spend.

Head-to-head comparisons

Compare Z.ai: GLM 4.5 Air with another model →

Other OpenRouter models

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