GLM-5.3-Flash API
LLMGLM-5.3-Flash is Z.ai's high-throughput multimodal route, with 1M context, image and video input, and always-on thinking.
- Input · USD / 1M tokens$0.075 USDOfficial price
$0.15 USD - Output · USD / 1M tokens$0.25 USDOfficial price
$0.5 USD - Savings50%
- Context1M
- Last verified2026-09-04
- View tool pricing and billing rules
What are we making today?
Bring an idea, a question, or a first draft.
01
Where it fits
GLM-5.3-Flash is Z.ai's high-throughput multimodal route, with 1M context, image and video input, and always-on thinking.
Choose it for cheap, frequent coding and multimodal calls that do not need the flagship GLM-5.3 route.
02
Model capabilities
Vision
Accepts visual input alongside text for multimodal coding and analysis tasks.
Tool use
Can select and call tools in agent workflows that support structured tool use.
Fast responses
Optimized for responsive iteration and higher-volume agent tasks.
03
OpenAI-compatible API
Keep your client and change the base URL, API key, and model ID.
curl https://api.omniakey.com/v1/chat/completions \
-H "Authorization: Bearer $OMNIAKEY_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "glm-5.3-flash",
"messages": [{"role": "user", "content": "Explain this codebase"}],
"stream": true
}'04
Compatible coding tools
More Z.ai models
Frequently asked questions
How much does GLM-5.3-Flash cost on OmniaKey?
OmniaKey charges $0.075 USD per 1M input tokens and $0.25 USD per 1M output tokens, in USD. Official prices are $0.15 USD and $0.5 USD; you save 50%.
What is the context window for GLM-5.3-Flash?
The listed context window is 1M. Actual usable limits can also depend on the client and upstream request format.
Which coding tools work with GLM-5.3-Flash?
The current catalog lists compatibility with Claude Code, Codex, Cursor, Cline, Aider. Use the model ID shown on this page when the client supports model selection.