GLM-5.3 Flash
The fast, low cost GLM-5.3. Paid on Z.ai, unlike the older free Flash models.
Z.ai (Zhipu), reasoning, open weights. Checked 30 October 2026.
Where to use it through an API
Z.aiglm-5.3-flash
The maker publishes its own benchmarks and limits on its model page.
How it compares
The models just above and below it on the Artificial Analysis Intelligence Index.
| Model | Index | Context | Speed |
|---|---|---|---|
| GLM-5.3 | 32 | 1M | 72/s |
| Gemini 3.8 Flash | 31 | 1M | 129/s |
| MiniMax M3.1 Flash | 29 | 1M | 118/s |
| GLM-5.3 Flash | 28 | 1M | 71/s |
| GPT-6 Luna | 28 | 1M | 118/s |
| Mistral Large 4 | 26 | 1M | 161/s |
| Muse Spark Open | 25 | 1.05M | 140/s |
Use GLM-5.3 Flash with every other AI at once
Put GLM-5.3 Flash in one panel and ChatGPT, Claude, Gemini or any of 300+ models in the others. One message goes to all of them, answers arrive side by side, and test mode times them and hides the names so you judge fairly. Pro is free with a follow on X, and you use your own keys.
Questions
Is there a free GLM-5.3 Flash API?
Not that we found. GLM-5.3 Flash is paid per token through Z.ai.
What is the GLM-5.3 Flash model id?
Z.ai: glm-5.3-flash.
How does GLM-5.3 Flash score?
28 on the Artificial Analysis Intelligence Index, checked 30 October 2026.
Can I use GLM-5.3 Flash with ChatGPT, Claude and Gemini at the same time?
Yes. MultiScreenAI puts GLM-5.3 Flash in one panel and other models in the others, sends one message to all of them and shows the answers side by side.