Any resource you have access to build the applications is fair as long as the idea itself is innovative and original.

You can use Claude, ChatGPT, Gemini or any of the open source models you have access to.

You MAY NOT use Lovable and Google AI studio

You can use OpenAI Codex, Cursor, Visual Studio Code + Github CoPilot or any such too to demonstrate original build.

Focus on outcomes and impact and not just code editor.