Models/Z.ai/GLM 5.3

GLM 5.3

Name: GLM 5.3 API access
Brand: Z.ai

NEW

Z.ai · Proprietary · Released Aug 18, 2026 · z-ai/glm-5.3

Compare Estimate cost

1.05M contextToolsReasoningStructured outputPrompt caching

Available from 1 providerUSD / MTOK · VERIFIED 4 MINUTES AGO

EST. MONTHLY COSTclick a row for detail · click headers to sort

PROVIDER	INPUT	OUTPUT	CACHE	CONTEXT	QUANT	TTFT	TPS	UPTIME
Z.AI1ST PARTY	$1.40	$4.40	$0.26	1.05M	fp8	0.86s	52 tok/s	100.0%

TTFT/TPS: median (P50) over trailing 72h · chat10k profile (~10K in / 200 out) · measured via OpenRouter routing · methodology v1.1 · measured 43 hours ago

Pricing variants · USD / MTok in / out

STANDARD

$1.40 / $4.40

per MTok in / out

CACHE READ $0.26

About

GLM-5.3 is a large-scale reasoning model from Z.ai, built for complex software engineering and long-horizon agent tasks. It supports text input and output with a 1M-token context window, and improves...

Specifications

Context window1,048,576

Max output131,072

Modalities intext

Modalities outtext

LicenseProprietary

ReleasedAug 18, 2026

TokenizerOther

GLM 5.2$0.50 / $2.00 GLM 5.1$0.91 / $2.86 GLM 5V Turbo$1.20 / $4.00 GLM 5 Turbo$1.20 / $4.00

Compare: GLM 5.3 vs Claude Opus 5 Compare: GLM 5.3 vs GPT-5.6 Terra Compare: GLM 5.3 vs Gemini 3.1 Pro Preview

Embed badge

[![GLM 5.3](https://modelindex.ai/badge/z-ai/glm-5.3)](https://modelindex.ai/models/z-ai/glm-5.3)

Sources

OpenRouter API4 minutes ago

AGGREGATOR

ModelIndex benchmarks43 hours ago

MEASURED

Verified 4 minutes ago · list prices, not negotiated rates.