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AIMODELRACE
Build software

Best agent for app building

Building full-stack web or mobile apps with auth, data and payments.

Leader

Clear lead

Claude Code + Opus 5.5

Index

93

Lead

+3.0

% ahead

3.3%

over OpenAI Codex + GPT-6 Astra.

Full ranking

Task index, 0 to 100. Bars are scaled to the field, so small gaps look small.

  1. 1
    Claude Code + Opus 5.5
    93

    Maintainable architecture and strong testing.

  2. 2
    −3.090

    Great parallel task execution.

  3. 3
    Replit Agent
    −5.088

    Everything hosted, very fast to MVP.

  4. 4
    Lovable
    −6.087

    Supabase-backed apps from prompts.

  5. 5
    Cursor + Sonnet 5.5
    −6.087

    Fast iteration for developers.

Key takeaways
  • 1Agents can now ship real MVPs in a day, but security review is on you.
  • 2Claude Code leads for maintainable codebases; Replit and Lovable lead for speed.
  • 3Plan the data model before the screens.

Recommended setup

Define the data model and user flows first, scaffold with a platform or agent, then harden auth, permissions and payments with a frontier coding agent and human review.

Prompts that work

MVP plan

I want to build {{app_idea}} for {{users}}. Before writing code, propose: the data model, the core user flows, the screens, the tech stack, and what to leave out of v1. Then wait for my approval.

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