Z.ai Slides (“PPT agent” in https://chat.z.ai) generates presentations from a natural language instruction.

Accessible in the Z.ai chatbot, the agent (in beta) searches for information, proposes a map, the layout and the final generation.

A document can be imported as a source.

PDF and PPTX export, editing possible by new instruction

Works on GLM models from Z.ai (Zhipu AI), a Chinese company.

Free with accounts. Unspecified limits, unlimited?