GLM-5.3-Flash by SiliconFlow
Create a key on the China site (cloud.siliconflow.cn) and call the OpenAI-compatible endpoint. The model is priced at 0 there; the international site may charge for it.
Benchmarks
Numbers are copied from the linked public leaderboards for this exact model and version. The free endpoint can run a different reasoning setting or quantization than the tested one.
Quickstart
curl https://api.siliconflow.cn/v1/chat/completions \
-H "Authorization: Bearer $KEY" \
-d '{"model":"zai-org/GLM-5.3-Flash","messages":[{"role":"user","content":"hi"}]}'Using this model in production?
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Frequently asked
Is GLM-5.3-Flash free?
Yes. SiliconFlow offers it as Free API tier with these limits: Free on siliconflow.cn · limits not published. No credit card is required.
Can I use GLM-5.3-Flash commercially?
Commercial terms are not clearly documented. Check the provider's current terms before shipping.
How do I start using GLM-5.3-Flash?
Get a free API key from the provider dashboard. Set the base URL to https://api.siliconflow.cn/v1 and the model to zai-org/GLM-5.3-Flash. Create a key on the China site (cloud.siliconflow.cn) and call the OpenAI-compatible endpoint. The model is priced at 0 there; the international site may charge for it.
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