W5 Chat

This is my submission to the t3 chat cloneathon, built fully by myself.

Supported Models

• OpenAI: o4-mini, GPT-4.1 nano, GPT-4.1
• Anthropic: Claude 4 Sonnet

Stack

• React Router
• TRPC
• Streaming TRPC
• AI SDK
• Express
• Clerk

Featureset

• Chat with Various LLMs

• Authentication & Sync

• Browser Friendly

• Easy to Try

• Syntax Highlighting

• Resumable Streams

Fix

• og prompt in new chats disappear

TODO

• model selection with multiple models from multiple providers
• auth
• chat ui
• chat history
• chat resumability
  • multiple clients can stream the same chat at the same time
  • automatically rejoin the stream when reconnecting or switching chat
  • show response history when rejoining stream
• chat deletion
• render performance / loading state
• markdown formatting and syntax highlighting
• clerk release mode
• sign-in ui
• model chat memory (locally is fine)
• live sidebar with subscription

nice to have:

• user permission limiting
• chat forking
• smooth animating text

Run

Copy over the .env.example to .env and fill in all variables.

Production

pnpm db:push

pnpm build
pnpm start

Development

pnpm dev