DeepSeek
Account needed
DeepSeek
Free to use with no published limits. Two modes, Expert and Instant. There is no paid plan.
checked Oct 16
Free AI for math
These chatbots solve and explain problems step by step. Always ask for the reasoning, not just the answer, and double-check the math.
Using it for school? Check your school's rules on AI first.
Tip to stretch the free limit
Send a photo of the problem to a chatbot that reads images and check the answer with another one; if both agree, that's a good sign.
Ready-to-copy prompt
Solve this step by step and explain each step in one sentence. Then give me a similar problem to try on my own.
The picks, in the order we'd try them
OpenAI
No sign-up
ChatGPT
Everyday text chats with no fixed message cap (with abuse protection). File uploads, image creation, voice and deep research are limited, with no numbers published.
checked Oct 16 · ⚠
Google
Sign-up optional
Gemini
Standard usage limits refresh every 5 hours up to a weekly cap, with no usage numbers published. Context window of 32k tokens. Deep Research may be unavailable at peak demand.
checked Oct 17
Perplexity AI
Sign-up optional
Perplexity
3 Pro Searches per day and 1 Research per month; file uploads are limited. No image generation or advanced models.
checked Oct 16 · ⚠
Anthropic
Account needed
Claude
A usage limit per session that resets every 5 hours; the exact number isn't published. Pro gives at least 5× more usage. No image generation.
checked Oct 16
Alibaba
Sign-up optional
Qwen Chat
Free to use with no published limits. There is no paid plan.
checked Oct 16
Other tasks
Updated