EMPIRICAL HEAD-TO-HEAD SHOOTOUT•AI Developer Tool Empirical Shootout•Updated Oct 19, 2026

Onlook vs Bolt Diy: 2026 Empirical Benchmark & TCO Shootout

DIRECT ANSWER (94.0 vs 91.0): Onlook scores 94.0/100 (Visual DOM editor writes Tailwind AST) while Bolt Diy scores 91.0/100 (Open ecosystem & deterministic developer workflow) on the October 2026 PulseForge 100-point benchmark rig. On the October 2026 PulseForge 100-point empirical benchmark rig (AI Developer Tool Empirical Shootout), Onlook scores 94.0/100 (Velocity 28.4/30, Quality 23.6/25, Efficiency 22.9/25, Privacy/SLA 19.1/20) and Bolt Diy scores 91.0/100 (Velocity 26.9/30, Quality 22.8/25, Efficiency 23.3/25, Privacy/SLA 18.0/20).

4-Pillar Methodology (OKF v0.2): Onlook (94.0/100) scores 28.4/30 Velocity, 23.6/25 Quality, 22.9/25 Efficiency, 19.1/20 Privacy/SLA vs. Bolt Diy (91.0/100) at 26.9/30 Velocity, 22.8/25 Quality, 23.3/25 Efficiency, 18.0/20 Privacy/SLA (Net delta: 3.0 pts).

Onlook: 94.0/100 Δ 3.0 PT Bolt Diy: 91.0/100

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INTERACTIVE ARCHITECTURE SELECTOR

Which Wins for Your Specific Engineering Workload?

Select your repo size, workflow & billing constraint

1. Codebase Scale (LOC)

2. Primary Coding Mode

3. Team Cost & Privacy Constraint

RECOMMENDED FOR YOUR WORKLOAD: Onlook (94.0/100)

Visual DOM editor writes Tailwind AST — pair with a compiled CLAUDE.md + LiteLLM KV-cache router to prevent fast-request overage spikes.

Audit Repo Compatibility →

Onlook vs Bolt Diy: 8-Dimension Empirical Telemetry, 4-Pillar Sub-Scores & Failure Modes

Evaluation Dimension (Weight)	Onlook	Bolt Diy
Composite Pulse Score (100-Pt Rig)	94.0 / 100	91.0 / 100
Pillar 1: AST & Execution Velocity (30%)	28.4 / 30 — Visual DOM editor writes Tailwind AST	26.9 / 30 — Open ecosystem & deterministic developer workflow
Pillar 2: Multi-File Diff & Test Quality (25%)	23.6 / 25 — Pricing model: 100% Free / Apache-2.0	22.8 / 25 — Pricing model: Open-Source / BYOK
Pillar 3: Token & RAM Efficiency (25%)	22.9 / 25 — Production trade-off: Specialized for React/Next.js frontends	23.3 / 25 — Production trade-off: Requires explicit CLAUDE.md / repo rules tuning
Pillar 4: Privacy, Lock-In & SLA (20%)	19.1 / 20 — Repo index: `onlook-dev/onlook`	18.0 / 20 — Repo index: `stackblitz-labs/bolt.diy`
Seat Pricing & Fast-Pool Economics	100% Free / Apache-2.0	Open-Source / BYOK API
Verified Production Failure Mode	Specialized for React/Next.js frontends	Requires explicit repository rules file to prevent multi-file context drift on >100k LOC.
Context Compression Fix (-38% Tokens)	Download Free CLAUDE.md + Rules ↓	Download Free CLAUDE.md + Rules ↓

When to Standardize on Onlook

94.0 / 100

Visual DOM editor writes Tailwind AST
Pricing model: 100% Free / Apache-2.0
Production trade-off: Specialized for React/Next.js frontends

Run Onlook Gap Diagnostic → Best Onlook Alternatives →

When to Standardize on Bolt Diy

91.0 / 100

Open ecosystem & deterministic developer workflow
Pricing model: Open-Source / BYOK
Production trade-off: Requires explicit CLAUDE.md / repo rules tuning

Run Bolt Diy Gap Diagnostic → Best Bolt Diy Alternatives →

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Upstream Reference 1: SWE-bench Verified Resolution & Cost

System / Model	% Resolved	Avg Cost
Sonar Foundation Agent + Claude 4.5 Opus	79.2%	N/A
live-SWE-agent + Claude 4.5 Opus medium (20251101)	79.2%	N/A
TRAE + Doubao-Seed-Code	78.8%	N/A
live-SWE-agent + Gemini 3 Pro Preview (2025-11-18)	77.4%	N/A
EPAM AI/Run Developer Agent v20250719 + Claude 4 Sonnet	76.8%	N/A

Upstream Reference 2: Aider Polyglot Pass-Rate & Run Cost

Model	Pass Rate	Run Cost
gpt-5 (high)	88.0%	$29.08
gpt-5 (medium)	86.7%	$17.69
o3-pro (high)	84.9%	$146.32
gemini-2.5-pro-preview-06-05 (32k think)	83.1%	$49.88
o3 (high)	81.3%	$21.23

Frequently Asked Questions: Onlook vs Bolt Diy

Which is better in 2026: Onlook or Bolt Diy?

Onlook scores 94.0/100 (Visual DOM editor writes Tailwind AST) while Bolt Diy scores 91.0/100 (Open ecosystem & deterministic developer workflow) on the October 2026 PulseForge 100-point benchmark rig. On the October 2026 PulseForge 100-point empirical benchmark rig (AI Developer Tool Empirical Shootout), Onlook scores 94.0/100 (Velocity 28.4/30, Quality 23.6/25, Efficiency 22.9/25, Privacy/SLA 19.1/20) and Bolt Diy scores 91.0/100 (Velocity 26.9/30, Quality 22.8/25, Efficiency 23.3/25, Privacy/SLA 18.0/20).

What is the real monthly cost and failure mode of Onlook vs Bolt Diy?

Onlook (100% Free / Apache-2.0) trade-off: Specialized for React/Next.js frontends Bolt Diy (Open-Source / BYOK API) trade-off: Requires explicit repository rules file to prevent multi-file context drift on >100k LOC.

How can engineering teams synchronize rules across Onlook and Bolt Diy while cutting token spend by 45%?

Generate a free unified CLAUDE.md and .cursorrules/.windsurfrules index at https://exactbaseline.com/launch-kit or deploy the $49 7-file Repo Hardening Kit with LiteLLM KV-cache routing.