Z.ai

GLM-5.3

Z.ai's latest flagship model for complex software engineering and long-horizon agent tasks, with a 1M-token context window and always-on reasoning.

ActiveReleased August 14, 2026
Tool callingCan invoke external tools and APIs (function calling) mid-response.Structured outputCan return JSON or schema-constrained responses instead of free text.ReasoningUses extended thinking / chain-of-thought for harder multi-step problems.Effort controlLets you dial thinking depth (low / medium / high) to trade cost for quality.Fine-tuningSupports training a custom variant on your own data (vendor fine-tune API or self-hosted open weights).

Source: Z.ai GLM-5.3 model documentation, Z.ai GLM API pricing, Z.ai release notes, Z.ai GLM-5.3 announcement, Z.ai context caching documentation, Z.ai deep thinking documentation

Price per 1M tokens via Z.ai (OpenRouter)
$1.4 in / $4.4 out
Context window1,000,000
Max output131,072
Cache read$0.26 / M
ModalitiesText → Text

Pricing

Every billing leg from the live catalog, in USD per 1M tokens.

Billing legRate
Input$1.4 / M
Output$4.4 / M
Cache read$0.26 / M

Cost calculator

Billing-grade math over the rate card above, including the thinking tokens most estimates miss.

Hidden reasoning tokens bill as output. 1.0x = thinking off. Medium-effort reasoning typically lands near 3x; heavy reasoning runs 6x to 8x. Set it to match your workload.

Estimated monthly cost
$544
at current list prices
Fresh input$280
Cached input$0.00
Output incl. thinking$264
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Provider

Where this model runs, and what it charges.

PlatformInput / MOutput / MCache read / MBatchAccess
Z.ai
$1.4$4.4$0.26—via OpenRouter

Price history

Has this model gotten cheaper or more expensive?

No changePriced at $1.4 / $4.4 per 1M since August 19, 2026.

More from Z.ai

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GLM-5.1
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$0.966 / $3.04 in / out per 1M
GLM-5
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GLM-5-Turbo
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$1.2 / $4 in / out per 1M
GLM-4.7
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$0.4 / $1.75 in / out per 1M
GLM-4.7-Flash
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$0.06 / $0.4 in / out per 1M

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Rates are generated from SuperPenguin's live pricing catalog.