GLM-5.3
Zhipu's GLM flagship, scoring 32 on the independent index at its max setting.
Z.ai (Zhipu), reasoning, open weights. Checked 30 October 2026.
Where to use it through an API
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 |
|---|---|---|---|
| Claude Fable 5.1 | 50 | 1M | 64/s |
| Grok 4.7 | 35 | 500K | 94/s |
| DeepSeek V4.1 Flash | 32 | 1M | 179/s |
| GLM-5.3 | 32 | 1M | 72/s |
| Gemini 3.8 Flash | 31 | 1M | 137/s |
| GPT-6 Luna | 28 | 1M | 122/s |
| Mistral Large 4 | 26 | 1M | 161/s |
Use GLM-5.3 with every other AI at once
Put GLM-5.3 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. Free during the beta with your own keys.
Questions
Is there a free GLM-5.3 API?
Yes, within limits: Fireworks, Ollama Cloud give free keys that reach GLM-5.3.
What is the GLM-5.3 model id?
Fireworks: accounts/fireworks/models/glm-5p3; Ollama Cloud: glm-5.3.
How does GLM-5.3 score?
32 on the Artificial Analysis Intelligence Index at its max setting, checked 30 October 2026.
Can I use GLM-5.3 with ChatGPT, Claude and Gemini at the same time?
Yes. MultiScreenAI puts GLM-5.3 in one panel and other models in the others, sends one message to all of them and shows the answers side by side.