Every frontier model. Plus your documents.

ChatGPT Plus is $20/month for one vendor's models. Silas starts free, and from $10/month gives you Claude, Gemini, and GPT — grounded in your own documents, with citations.

Free: try it on your docs · Student: every model, daily · Pro: live on them

Free
The real product, sized to try
$0
  • Fast Gemini and GPT models
  • Cited answers from up to 3 saved documents
  • Semantic search inside your docs
  • No credit card required
Get started free
Student
Your whole course load, with citations
$10/month
  • Every model, including Claude
  • Cited answers across a 250-document library
  • Google Drive, Microsoft 365 & Canvas sync
  • Sharing, workflows, and metadata search
Start Student
Most Popular
Pro
Deeper retrieval for heavy use
$20/month
  • Everything in Student
  • Ask entire folders and projects
  • Deeper retrieval with reranking
  • Project instructions and memory
Upgrade to Pro

Research · $50/month

Large libraries and premium usage

Start Research

Enterprise · Custom

Shared knowledge for your whole team — SSO, LMS integrations, audit logging, SLA

Contact Sales

Every plan includes cited answers from your saved documents. Paid plans add Claude and the premium models, library size, integrations and sync, and retrieval depth.