How much does GLM-4.5-Air cost per month?

For a chatbot handling 10,000 requests a day with 1,000 input and 500 output tokens each, GLM-4.5-Air costs about $225.00 per month at Z.AI's list prices ($0.20 per 1M input tokens, $1.10 per 1M output tokens).

Does GLM-4.5-Air support prompt caching?

Yes. Cached input costs $0.03 per 1M tokens, compared with $0.20 for regular input. Writing to the cache costs Free per 1M tokens.

How long is GLM-4.5-Air's context window?

GLM-4.5-Air accepts up to 131,072 tokens (131K) of context and returns up to 98,304 tokens per response.

GLM-4.5-Air API Pricing

Z.AI · released Jul 28, 2025 · 131K context · API model ID glm-4.5-air

GLM-4.5-Air by Z.AI API pricing: $0.20 per 1M input tokens and $1.10 per 1M output tokens (provider list price via models.dev, Oct 10, 2026).

Prices

GLM-4.5-Air prices, USD per 1M tokens
Price	USD per 1M tokens
Input	$0.20
Output	$1.10
Cache read	$0.03
Cache write	Free

Z.AI's list price for its own API, as compiled by models.dev and checked Oct 10, 2026, 09:00 UTC. Prices on cloud platforms and resellers can differ. Provider documentation

Estimated monthly cost

$225.00

per month

per day: $7.50
per request: $0.00075

Cost = input tokens × input price + output tokens × output price, 30 days a month. Cached input uses the cache read price. Cache write fees are not included.

Compare this workload across models

Monthly cost by workload

Workload	Per month
Chatbot1,000 in / 500 out tokens, 10,000 requests a day	$225.00/mo
RAG8,000 in / 500 out tokens, 5,000 requests a day	$322.50/mo
Coding agent50,000 in / 2,000 out tokens, 1,000 requests a day, 80% cached input	$162.00/mo

Context and capabilities

Context: 131,072 tokens
Max output: 98,304 tokens
Input: text
Output: text
Knowledge cutoff: April 2025
Open weights: Yes
Tool calling: Yes
Reasoning: Yes
Structured outputs: No

Capabilities and limits as listed by models.dev.

Similarly priced models

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GLM-5.3-FlashX · $0.37 in / $1.25 out
Qwen3.8 Flash · $0.15 in / $0.47 out

Price history

No price changes since we started tracking on Oct 8, 2026.

Questions

How much does GLM-4.5-Air cost per month?: For a chatbot handling 10,000 requests a day with 1,000 input and 500 output tokens each, GLM-4.5-Air costs about $225.00 per month at Z.AI's list prices ($0.20 per 1M input tokens, $1.10 per 1M output tokens).
Does GLM-4.5-Air support prompt caching?: Yes. Cached input costs $0.03 per 1M tokens, compared with $0.20 for regular input. Writing to the cache costs Free per 1M tokens.
How long is GLM-4.5-Air's context window?: GLM-4.5-Air accepts up to 131,072 tokens (131K) of context and returns up to 98,304 tokens per response.