GLM 5.3 Fast
Speed-optimized version of Z.AI’s GLM-5.3 agentic coding model, built for responsive, real-time workloads. It supports advanced coding, long-horizon task execution, testing, vulnerability discovery, and cybersecurity analysis, making it ideal for developer tools, coding agents, and complex multi-step engineering workflows.
- Input and output price
- Input $2.10, Output $6.60, Per 1M tokens
- 24h uptime
- Loading AI Gateway uptime
import { streamText } from 'ai'
const result = streamText({ model: 'zai/glm-5.3-fast', prompt: 'Why is the sky blue?'})Copy link to headingProviders
Route requests across multiple providers. Copy a provider slug to set your preference. Visit the docs for more info. Using a provider means you agree to their terms, listed under Legal.
Copy link to headingPlayground
Try out GLM 5.3 Fast by Z.AI. Usage is billed to your team at API rates. Free users (those who haven't made a payment) get $5 of credits every 30 days.
GLM 5.3 Fast
GLM 5.3 Fast
Copy link to headingUptime24 hours
Direct request success rate on AI Gateway and per-provider. Visit the docs for more info.
Copy link to headingThroughput24 hours
P50 throughput on live AI Gateway traffic, in tokens per second (TPS). Visit the docs for more info.
Copy link to headingLatency24 hours
P50 time to first token (TTFT) on live AI Gateway traffic, in milliseconds. View the docs for more info.
Copy link to headingMore models by Z.AI
| Model |
|---|
| 1M | 0.8 s | 218 tps | $0.70/M | $2.20/M | Read$0.13/M | — |  | 09/02/2026 | ||||||
| 1M | 0.5 s | 168 tps | $0.07/M | $0.24/M | Read$0.01/M | — | +1 |   +14 | 08/26/2026 | |||||
| 1M | 0.2 s | 320 tps | $0.70/M+1 more | $2.20/M+1 more | Read$0.12/M | — | +11 | 08/18/2026 | ||||||
| 1M | 0.5 s | 230 tps | $2.10/M | $6.60/M | Read$0.21/M | — |   | 06/23/2026 | ||||||
| 1M | 0.2 s | 495 tps | $0.70/M+1 more | $2.20/M+1 more | Read$0.11/M | — |  +15 | 06/16/2026 | ||||||
| 203K | 0.8 s | 122 tps | $1/M | $3.20/M | Read$0.20/M | — |   | 02/12/2026 |