import requests r = requests.post( "https://api.aimlapi.com/v1/chat/completions", headers={"Authorization": "Bearer " + AIMLAPI_KEY}, json={ "model": "z-ai/glm-5.3-flashx", "messages": [ { "role": "user", "content": "Hello!" } ] }, ) print(r.json())
const r = await fetch("https://api.aimlapi.com/v1/chat/completions", { method: "POST", headers: { Authorization: `Bearer ${process.env.AIMLAPI_KEY}`, "Content-Type": "application/json", }, body: JSON.stringify({ "model": "z-ai/glm-5.3-flashx", "messages": [ { "role": "user", "content": "Hello!" } ] }), }); console.log(await r.json());
curl -X POST https://api.aimlapi.com/v1/chat/completions \ -H "Authorization: Bearer $AIMLAPI_KEY" \ -H "Content-Type: application/json" \ -d '{"model":"z-ai/glm-5.3-flashx","messages":[{"role":"user","content":"Hello!"}]}'
OpenAI-compatible — swap the base URL and it works with your existing SDK.
| Type | Price |
|---|---|
| Input | |
| Output | |
| Cached input |
Reasoning tokens are billed at the output rate. Structured tool calls carry an additional charge of $0.013 per call.
GLM 5.3 FlashX has a 1,048,576 token context window and can return up to 131,072 tokens.
FlashX is the high-speed variant. It runs on the same hybrid sparse-plus-linear attention architecture and the same 1M-token context window as GLM-5.3 Flash, but is tuned for throughput — Zhipu reports up to 200 tokens per second.
GLM 5.3 FlashX is priced at input $0.481 / 1M tokens, output $1.625 / 1M tokens, cached input $0.0975 / 1M tokens. Reasoning tokens are billed at the output rate, and structured tool calls carry an extra $0.013 per call.
It accepts images and text as input and returns text. File input is supported as well.
Yes. It supports function calling including parallel tool calls, structured (JSON schema) output, streaming and reasoning. Note that structured tool calls are billed separately at $0.013 per call.
Zhipu AI reports up to 200 tokens per second. That figure is vendor-reported and has not been independently reproduced.
GLM 5.3 FlashX was built by Zhipu AI as part of the GLM-5.3 family, alongside GLM-5.3 and GLM-5.3 Flash. It became available on September 18, 2026.
It is served on the OpenAI-compatible chat completions endpoint. Point any OpenAI SDK at https://api.aimlapi.com/v1 and set the model to z-ai/glm-5.3-flashx. The aliases glm-5.3-flashx and zhipu/glm-5.3-flashx also resolve to it.
