GLM 5.3 Flash: API price, context window and how to connect
GLM 5.3 Flash by Z.ai (Zhipu): $0.048 per million input tokens, $0.2 per million output tokens, a 1.05M-token window. What it is good for, what to compare it with and how to connect it in SKILLOK.
In this article
In short#
A multimodal Z.ai model for economical coding and long agentic tasks. Its hybrid attention (sparse and linear) keeps long-context behavior accurate. The weights are open.
Specifications#
| Provider | Z.ai (Zhipu) |
| Released | 2026-08-26 |
| Context window | 1.05M tokens |
| Accepts | text, images, video |
| Answers with | text |
| Reasoning mode | yes |
| Tool calling | yes |
| Open weights | yes |
| Identifier | z-ai/glm-5.3-flash |
Price#
| Per 1M tokens | In dollars |
|---|---|
| Input (question, context) | $0.048 |
| Output (answer) | $0.2 |
For reference: a conversation of 20 questions of ~500 tokens and answers of ~800 tokens costs about $0.004. Models in reasoning mode spend more tokens on an answer than the text shows: the reasoning is paid for too.
What it is good for#
- Code for very little money
- Long context
- Images and video as input
Similar models#
Catalog models with the same kind of output, closest in the price of a typical request.
| Model | Input | Output | Window | Price |
|---|---|---|---|---|
| DeepSeek V4 Flash 0423 | $0.091 | $0.182 | 1.05M | 1.2× more expensive |
| Llama 4 Scout | $0.1 | $0.3 | 1.31M | 1.7× more expensive |
| Llama 3.3 70B Instruct | $0.1 | $0.32 | 131K | 1.7× more expensive |
| DeepSeek V4.1 Flash | $0.044 | $0.08 | 1.05M | 1.9× cheaper |
| GPT-6 Luna | $0.1 | $0.5 | 1.05M | 2.4× more expensive |
Other Z.ai (Zhipu) models#
How to connect in SKILLOK#
GLM 5.3 Flash works through OpenRouter: add an OpenRouter key in Settings → AI and pick the z-ai/glm-5.3-flash model. It then becomes available in Space AI, in tasks and to the repository agent. In detail — Connecting a model in SKILLOK.
Where the data comes from#
Prices, the context window and capabilities come from the public OpenRouter catalog as of 2026-10-19. A provider may change the price — the exact figure is always on the model's OpenRouter page.
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