With Gemini's public chatbot (web or mobile app), users can upload up to 10 images per prompt. For generating images with a prompt, up to 6 images can be generated at once in one go, as a discovered but unofficial feature. Regarding daily limits, free users reportedly could generate up to around 100 images per day, while paid plans or Pro users have higher or customizable limits. For developers using the Gemini API, the theoretical maximum can be much larger, allowing thousands of images in one API request (up to around 3,000-3,600 images depending on model). However, this is also governed by rate limits like requests per minute and per day, depending on the billing tier and project quota. For free tier, limits are quite low; upgrading billing increases quotas significantly. In summary:

• Gemini chatbot: max 10 images per prompt upload, typically generates up to 6 images per prompt.
• Free user daily creation: up to approx 100 images/day.
• Pro and API users: much higher limits based on usage tier and billing, up to thousands per request with rate limits.

This matches the latest info from 2025 about Gemini's image generation and upload limits.