Z.ai: GLM 5.3 FlashX Legal
GLM 5.3 FlashX Legal is a reasoning model from Z.ai released on Nov 2, 2026. It reads text and images and writes text, with a 1M token context window and up to 131K tokens per reply.
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It costs $0.37 per million input tokens and $1.25 per million output tokens. Cached input bills at $0.075, 80% less than fresh input.
It supports tool calling, structured JSON output and prompt caching.
3 providers serve it, including Vercel AI Gateway, Kilo Gateway and NanoGPT.
- Modalities
- In / out price
- $0.37 / $1.25 per 1M
- Context
- 1M
- Max output
- 131K
- Released
- Nov 2, 2026
- Knowledge cutoff
- n/a
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
GLM 5.3 FlashX Legal pricing
USD, as listed on Nov 3, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.
| Input | $0.37 / 1M tokens | |
|---|---|---|
| Output | $1.25 / 1M tokens | |
| Cached input (read) | $0.075 / 1M tokens | 80% off input |
GLM 5.3 FlashX Legal providers
3 providers serve it, including Vercel AI Gateway, Kilo Gateway and NanoGPT. Each host sets its own price and limits, so the cheapest one is not always the one with the longest context.
| Provider | Input /M | Output /M | Cache read /M | Context | Max output |
|---|---|---|---|---|---|
| Vercel AI Gateway | $0.37 | $1.25 | $0.075 | 1M | 131K |
| Kilo Gateway | $0.37 | $1.25 | $0.075 | 1.05M | 131K |
| NanoGPT | $0.37 | $1.25 | $0.075 | 1.05M | 131K |
What GLM 5.3 FlashX Legal costs per month
Pick a workload close to yours or type your own volumes.
Supported request parameters
What you can set when you call GLM 5.3 FlashX Legal through an OpenAI compatible API.
- Tools
tools - Structured outputs
structured_outputs - Reasoning
reasoning
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GLM 5.3 FlashX Legal questions
How much does the GLM 5.3 FlashX Legal API cost?
$0.37 per million input tokens and $1.25 per million output tokens, with cached input at $0.075. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of GLM 5.3 FlashX Legal?
1,000,000 tokens of input, and it can write up to 131,072 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.
Which providers serve GLM 5.3 FlashX Legal?
3 providers serve it, including Vercel AI Gateway, Kilo Gateway and NanoGPT. Prices differ by host, so the Providers table on this page lists each one with its input and output price.
Does GLM 5.3 FlashX Legal support tool calling?
Yes. It accepts tool definitions and can return JSON that matches a schema, which is what an agent needs to call your APIs.
Is GLM 5.3 FlashX Legal open source?
No. Z.ai serves it through an API only, so you cannot download the weights or host it yourself.
When was GLM 5.3 FlashX Legal released?
Nov 2, 2026.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Nov 3, 2026. The summary is written from these facts.