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Can I vibecode ChatGPT?

price $20/moyou'd save $240/yrbuild time one sittingcategory ai assistantsreplaced by 6 people
NOT REALLY
MOATproprietary modelsscale infra

General-purpose AI chat with GPT models

In-List Ad$79/30 days
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The Build Prompt

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Build me a personal chat client on the OpenAI and Anthropic APIs to replace the
text-chat part of ChatGPT Plus. Requirements:

- A local web app: Node + Express + better-sqlite3, one page with a streaming
  reply pane (SSE), a model picker, and a conversation sidebar.
- OpenAI and Anthropic keys in .env; system prompt editable per conversation.
- Conversations stored in SQLite with FTS5 search; export any thread to
  Markdown.
- File upload for text and PDF (pdf-parse); contents go straight into the
  context window, no vector database.
- A usage footer: tokens and estimated cost per conversation and per month,
  computed from the usage field in API responses, so I can compare real spend
  against the $20 flat fee.
- Localhost only. No accounts, no telemetry, everything stays on my machine
  except the API calls.
- Out of scope: image generation, voice mode, browsing agents, memory, and
  mobile apps. Do not attempt any of them; that gap is the subscription.
- README: where to get each key, links to current per-token pricing, and state
  plainly that this replaces text chat only, the frontier model itself cannot
  be rebuilt.
In-List Ad$79/30 days
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What you lose

  • GPT-4o model access without API costs
  • DALL-E image generation
  • Code Interpreter
  • GPTs and plugins
  • Memory across conversations
  • Voice mode
In-List Ad$79/30 days
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Questions

5 answers