{
  "dataset": "BuilderProof AI App Builder Benchmark Scores (2026)",
  "description": "Reproducible, published six-axis benchmark scores for the 2026 cohort of AI app builders, compiled by the BuilderProof editorial team. Every number traces to a public per-axis leaderboard on builderproof.org. No vendor sponsorships; leaderboards are community-editable.",
  "publisher": "BuilderProof editorial team",
  "canonical_url": "https://www.builderproof.org/benchmarks/best-ai-app-builder-2026-six-axis-composite-leaderboard",
  "methodology_url": "https://www.builderproof.org/benchmarks/how-we-benchmark-ai-app-builders-methodology-v1",
  "homepage": "https://www.builderproof.org",
  "license": "CC BY 4.0",
  "version": "2026.07",
  "as_of": "2026-07",
  "generated_from": "Published BuilderProof leaderboard posts (admin export). Values mirror the live post bodies verbatim; no values are inferred or fabricated.",
  "score_scales": { "per_axis": "0-10 unless noted", "output_quality": "0-100", "composite": "0-60 (sum of six axes)" },
  "cohort": ["v0", "Lovable", "Bolt.new", "Replit", "Base44"],
  "composite_leaderboard": [
    { "rank": 1, "builder": "v0", "composite_out_of_60": 47 },
    { "rank": 2, "builder": "Replit", "composite_out_of_60": 45 },
    { "rank": 3, "builder": "Lovable", "composite_out_of_60": 44 },
    { "rank": 3, "builder": "Bolt.new", "composite_out_of_60": 44 },
    { "rank": 5, "builder": "Base44", "composite_out_of_60": 38 }
  ],
  "axes": {
    "output_quality": { "scale": "0-100", "stage": "scored", "published": "2026-07-09", "source_url": "https://www.builderproof.org/benchmarks/ai-app-builder-output-quality-2026-output-leaderboard", "sub_criteria": ["visual_fidelity", "code_structure", "functional_correctness"], "scores": [
      { "builder": "Lovable", "visual_fidelity": 95, "code_structure": 90, "functional_correctness": 94, "score": 93 },
      { "builder": "v0", "visual_fidelity": 96, "code_structure": 86, "functional_correctness": 90, "score": 90 },
      { "builder": "Bolt.new", "visual_fidelity": 92, "code_structure": 85, "functional_correctness": 88, "score": 88 },
      { "builder": "Replit", "visual_fidelity": 88, "code_structure": 82, "functional_correctness": 85, "score": 84 },
      { "builder": "Base44", "visual_fidelity": 87, "code_structure": 74, "functional_correctness": 78, "score": 79 } ] },
    "deploy_quality": { "scale": "0-10", "stage": "scored", "published": "2026-07-09", "source_url": "https://www.builderproof.org/benchmarks/ai-app-builder-deploy-quality-2026-deployment-leaderboard", "scores": [
      { "builder": "v0", "score": 9 }, { "builder": "Replit", "score": 8 }, { "builder": "Base44", "score": 8 }, { "builder": "Bolt.new", "score": 7 }, { "builder": "Lovable", "score": 6 } ] },
    "code_portability": { "scale": "0-10", "stage": "scored", "published": "2026-07-08", "source_url": "https://www.builderproof.org/benchmarks/ai-app-builder-code-ownership-2026-portability-leaderboard", "scores": [
      { "builder": "v0", "score": 8 }, { "builder": "Bolt.new", "score": 8 }, { "builder": "Lovable", "score": 7 }, { "builder": "Replit", "score": 7 }, { "builder": "Base44", "score": 4 } ] },
    "auth_posture": { "scale": "0-10", "stage": "scored", "published": "2026-07-07", "source_url": "https://www.builderproof.org/benchmarks/ai-app-builder-security-2026-auth-posture-leaderboard", "scores": [
      { "builder": "Bolt.new", "score": 8 }, { "builder": "Replit", "score": 8 }, { "builder": "Lovable", "score": 7 }, { "builder": "v0", "score": 6 }, { "builder": "Base44", "score": 5 } ] },
    "first_build_stability": { "scale": "0-10", "stage": "proposal", "published": "2026-06-20", "source_url": "https://www.builderproof.org/benchmarks/first-build-stability-v2-axis-proposal-june-2026", "note": "Axis proposal stage. Composite hub reports the top three tie at 8; full per-builder cells not yet published.", "leaders": [
      { "builder": "Lovable", "score": 8 }, { "builder": "Replit", "score": 8 }, { "builder": "Base44", "score": 8 } ] },
    "iteration_fidelity": { "scale": "0-10", "stage": "proposal", "published": "2026-07-01", "source_url": "https://www.builderproof.org/benchmarks/iteration-fidelity-v2-axis-proposal-july-2026", "note": "Axis proposal stage. Composite hub reports v0 leads at 8 with Lovable, Bolt.new, Replit at 7; full per-builder cells not yet published.", "leaders": [
      { "builder": "v0", "score": 8 }, { "builder": "Lovable", "score": 7 }, { "builder": "Bolt.new", "score": 7 }, { "builder": "Replit", "score": 7 } ] }
  }
}