Z.ai

GLM 5.3 Flash

40% under Z.ai's list price on input and 70% on output

GLM 5.3 Flash by Z.ai through the RelaySwitch API: $0.09 per million input tokens, $0.15 per million output tokens. Pay by card or crypto (Card, Apple Pay, PayPal, USDT, USDC, BTC, ETH, SOL). No KYC.

Input / M$0.09Z.ai list: $0.15
Cached input / M$0.0112Z.ai list: $0.03
Output / M$0.15Z.ai list: $0.50

Specs

Model id
glm-5.3-flash
Developer
Z.ai
Context window
1M tokens
Max output
131K tokens
Input
text, image, video
Released
2026-08-26

Call it

bash
1curl https://api.relayswitch.io/v1/chat/completions \
2 -H "Authorization: Bearer $RELAYSWITCH_KEY" \
3 -H "Content-Type: application/json" \
4 -d '{
5 "model": "glm-5.3-flash",
6 "messages": [{"role": "user", "content": "Hello"}]
7 }'

Any OpenAI SDK works: set the base URL to https://api.relayswitch.io/v1 and the model to glm-5.3-flash. Get a key or read the docs.

More from Z.ai

FAQs

GLM 5.3 Flash: questions

Payment, keys and billing in short.

Open the console

A key in under a minute

Get a key

Or email hello@relayswitch.io

Run GLM 5.3 Flash today

Top up by card or crypto and send "glm-5.3-flash".

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