> ## Documentation Index
> Fetch the complete documentation index at: https://siliconflow-4a6a0801.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Rate Limits Issues

## 1. How to increase concurrency rate limits

* The Rate Limits for all free models are fixed.
* For some models, the platform provides both a free version and a paid version. The free version is named as is; the paid version is prefixed with "Pro/" to distinguish it.
* Paid versions of models support unlocking more relaxed Rate Limits by spending a monthly amount. You can also purchase [packages](https://cloud.siliconflow.cn/package) to quickly increase the Rate Limits.
* For the DeepSeek R1 and DeepSeek V3 models, the Rate Limits are fixed.

<Note> If you encounter other issues, please click on the [SiliconCloud MaaS Online Requirement Collection Form](https://m09tqret04o.feishu.cn/share/base/form/shrcnaamvQ4C7YKMixVnS32k1G3) to provide feedback.</Note>