We re making three frontier open-source models free* on Zo until the end of February. GLM-5, Kimi K2.5, and MiniMax M2.5 are now free to use on Zo. And we ve increased the AI usage limits on our free plan significantly.

We re incredibly excited about recent progress in open-source models. Three labs dropped big releases just weeks apart, ahead of the highly anticipated DeepSeek R2. These open models are quickly catching up to closed models like ChatGPT and Claude, which are much more expensive.