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 to quickly increase the Rate Limits.
For the DeepSeek R1 and DeepSeek V3 models, the Rate Limits are fixed.