Plandex vs Aider: 2026 Empirical Benchmark & TCO Shootout
DIRECT ANSWER (97.0 vs 98.0): Plandex scores 97.0/100 (Isolates experimental multi-file refactors in a protected git sandbox before merging.) while Aider scores 98.0/100 (Automatically generates precise git commit messages with exact syntax-validated diffs.) on the October 2026 PulseForge 100-point benchmark rig. On the October 2026 PulseForge 100-point empirical benchmark rig (Coding & DevTools Empirical Shootout), Plandex scores 97.0/100 (Velocity 29.3/30, Quality 24.3/25, Efficiency 23.7/25, Privacy/SLA 19.7/20) and Aider scores 98.0/100 (Velocity 29.0/30, Quality 24.5/25, Efficiency 25.1/25, Privacy/SLA 19.4/20).
CLAUDE.md + .cursorrules
CLAUDE.md, .cursorrules, LiteLLM Router, Gitleaks CI) for $29 (save $20).
Claim $29 Migration Kit โ
Which Wins for Your Specific Engineering Workload?
Isolates experimental multi-file refactors in a protected git sandbox before merging. โ pair with a compiled CLAUDE.md + LiteLLM KV-cache router to prevent fast-request overage spikes.
Plandex vs Aider: 8-Dimension Empirical Telemetry, 4-Pillar Sub-Scores & Failure Modes
| Evaluation Dimension (Weight) | Plandex | Aider |
|---|---|---|
| Composite Pulse Score (100-Pt Rig) | 97.0 / 100 | 98.0 / 100 |
| Pillar 1: AST & Execution Velocity (30%) | 29.3 / 30 โ Isolates experimental multi-file refactors in a protected git sandbox before merging. | 29.0 / 30 โ Automatically generates precise git commit messages with exact syntax-validated diffs. |
| Pillar 2: Multi-File Diff & Test Quality (25%) | 24.3 / 25 โ Pricing model: 100% Open Source / Free Cloud Tier | 24.5 / 25 โ Pricing model: 100% Free / Open Source (BYO API key) |
| Pillar 3: Token & RAM Efficiency (25%) | 23.7 / 25 โ Production trade-off: Token consumption accelerates rapidly on large repositories without a configured .plandexignore file. | 25.1 / 25 โ Production trade-off: Terminal keyboard workflow requires memorizing in-line commands and model flag toggles. |
| Pillar 4: Privacy, Lock-In & SLA (20%) | 19.7 / 20 โ Repo index: plandex/plandex | 19.4 / 20 โ Repo index: Aider-AI/aider |
| Seat Pricing & Fast-Pool Economics | 100% Open Source / Free Cloud Tier | 100% Free / Open Source (BYO API key) |
| Verified Production Failure Mode | Token consumption accelerates rapidly on large repositories without a configured .plandexignore file. | Terminal keyboard workflow requires memorizing in-line commands and model flag toggles. |
| Context Compression Fix (-38% Tokens) | Download Free CLAUDE.md + Rules โ | Download Free CLAUDE.md + Rules โ |
When to Standardize on Plandex
97.0 / 100- Isolates experimental multi-file refactors in a protected git sandbox before merging.
- Pricing model: 100% Open Source / Free Cloud Tier
- Production trade-off: Token consumption accelerates rapidly on large repositories without a configured .plandexignore file.
When to Standardize on Aider
98.0 / 100- Automatically generates precise git commit messages with exact syntax-validated diffs.
- Pricing model: 100% Free / Open Source (BYO API key)
- Production trade-off: Terminal keyboard workflow requires memorizing in-line commands and model flag toggles.
Make plandex/plandex Run 45% Cheaper Across Both Plandex & Aider
Includes pre-compiled CLAUDE.md, synchronized .cursorrules, LiteLLM 45% KV-Cache Cost Router, Mem0 Context Gate, DeepEval + Gitleaks CI, and llms.txt.
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: Plandex vs Aider
Which is better in 2026: Plandex or Aider?
Plandex scores 97.0/100 (Isolates experimental multi-file refactors in a protected git sandbox before merging.) while Aider scores 98.0/100 (Automatically generates precise git commit messages with exact syntax-validated diffs.) on the October 2026 PulseForge 100-point benchmark rig. On the October 2026 PulseForge 100-point empirical benchmark rig (Coding & DevTools Empirical Shootout), Plandex scores 97.0/100 (Velocity 29.3/30, Quality 24.3/25, Efficiency 23.7/25, Privacy/SLA 19.7/20) and Aider scores 98.0/100 (Velocity 29.0/30, Quality 24.5/25, Efficiency 25.1/25, Privacy/SLA 19.4/20).
What is the real monthly cost and failure mode of Plandex vs Aider?
Plandex (100% Open Source / Free Cloud Tier) trade-off: Token consumption accelerates rapidly on large repositories without a configured .plandexignore file. Aider (100% Free / Open Source (BYO API key)) trade-off: Terminal keyboard workflow requires memorizing in-line commands and model flag toggles.
How can engineering teams synchronize rules across Plandex and Aider 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.