Every frontier model. Plus your documents.

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

Free: try every model · Student: premium models daily · Pro: live on them

Free
The real product, sized to try
$0
  • Every model: Claude, Gemini, GPT, DeepSeek
  • 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
  • Everything in Free, with room to grow
  • 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 all chat models and cited answers from your saved documents. Paid plans add library size, integrations and sync, and retrieval depth.