GLM-5.3 FlashX is Zhipu AI's language model with a 1.0M context window and up to 131K output tokens, available from 2 providers, starting at $0.37 / 1M input and $1.25 / 1M output. A high-speed serving variant of Z.ai's native multimodal coding LLM with 320B total parameters, 18B activated parameters, and a 1M-token context window.
Specifications
Canonical IDzhipu-glm-5-3-flash-x
TypeLanguage
StatusActive
CreatorZhipu AIZhipu AI
Providers
Context Window1.0M tokens
Max Output131K tokens
Input ModalitiesImageTextVideo
Output ModalitiesText
Reasoning Effortsdefault
Release Date · 26 days ago
Deprecation Date

Capabilities

Input3/5
Text✓
Image✓
Audio·
Video✓
PDF·
Output1/5
Text✓
Image·
Audio·
Video·
Embedding·
Capabilities4/13
Reasoning✓
Adaptive Reasoning·
Function Calling✓
Parallel Function Calling·
Structured Outputs✓
Native JSON Schema·
Web Search·
URL Context·
Computer Use·
Code Execution·
File Search·
Prompt Caching✓
Assistant Prefill·

Pricing by Provider

US Dollar ($)
Per 1M tokens
ProviderStandard
Input
$ / 1M
Output
$ / 1M
Cache Read
$ / 1M
OpenRouter logo
OpenRouter
z-ai/glm-5.3-flashx
$0.37$1.25$0.09
Vercel AI Gateway logo
Vercel AI Gateway
zai/glm-5.3-flashx
$0.37$1.25$0.075

Cost Calculator

US Dollar ($)
Preset:

Versions

VersionReleasedContextInput / 1MOutput / 1MStatus
GLM-5.3 FlashX1.0M$0.370$1.25Current
GLM-5.3 Flash1.3M$0.026$0.350Available
GLM-5.3 Flash US—1.0M$0.225$0.750Available
GLM-4.6V Flash128K——Available
GLM-4.7 Flash Non-Reasoning————Available
GLM-4.5 Flash—128K——Available

Other Models

ModelTierReleasedContextInput / 1MOutput / 1M
GLM-5.3 Prime—1.0M$2.80$8.80
GLM-5.3—1.3M$0.079$3.08
GLM-5.3 (50% off)—1.0M——
GLM-5.2 Fast—1.0M$2.10$6.60
GLM-5.2—1.0M$0.060$1.98
GLM-5V Turbo—205K$0.704$3.10
GLM-5 Turbo—203K$1.20$4.00
GLM-5.1 Non-Reasoning—————
GLM-5 Non-Reasoning—————
GLM-5 Code——200K$1.20$5.00

Model IDs

openrouter/z-ai/glm-5.3-flashx
z-ai/glm-5.3-flashx
zai/glm-5.3-flashx
zhipu-glm-5-3-flash-x