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 · ⚠
Free AI for homework
These chatbots help you understand an assignment, organize your ideas and find sources, all on a free plan.
Using it for school? Check your school's rules on AI first.
Tip to stretch the free limit
Ask Perplexity for linked sources and check each one; use another chatbot to review your own draft instead of asking for a finished assignment.
Ready-to-copy prompt
Here is my assignment: [paste it]. Help me outline it with an introduction, 3 main points and a conclusion, and tell me what kind of source to look for in each part.
The picks, in the order we'd try them
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 · ⚠
DeepSeek
Account needed
DeepSeek
Free to use with no published limits. Two modes, Expert and Instant. There is no paid plan.
checked Oct 16
Microsoft
Account needed
Microsoft Copilot
A limited free version that depends on available capacity, with no numbers published. When you hit the limit, you wait or upgrade.
checked Oct 17
DuckDuckGo
No sign-up
Duck.ai
Free with a daily limit (no number published) and no account. You pick the model, including Claude Haiku and open models; PDFs up to 15 pages.
checked Oct 17
Other tasks
Updated