# π Benchmark Results Summary: Claudette vs Claude Sonnet 4
**Test Date:** 2025-10-10
**Benchmark:** Express.js Product Cache API (Medium Complexity)
**Evaluation Method:** Mode B (External Evaluation)
**Evaluator:** Claude Sonnet 4 (Unbiased)
---
## π Head-to-Head Comparison
| Metric | **Claudette** | **Claude Sonnet 4** | Winner |
|--------|---------------|---------------------|---------|
| **Overall Weighted Score** | **8.8/10** | 8.5/10 | π **Claudette** |
| Code Quality (45% weight) | 9.0/10 | 9.5/10 | Claude |
| Token Efficiency (35% weight) | **9.0/10** | 7.0/10 | π **Claudette** |
| Explanatory Depth (20% weight) | 8.0/10 | 9.0/10 | Claude |
| **Total Tokens Used** | **~900** | ~2,800 | π **Claudette** |
| Lines of Actual Code | 54 | 145 | Claude |
| **Code Lines per 1K Tokens** | **60** | 51.8 | π **Claudette** |
---
## π Performance Analysis
### π₯ Claudette (8.8/10) β **OVERALL WINNER**
**Efficiency Champion:**
- **67% fewer tokens** (~900 vs ~2,800)
- **16% higher code density** (60 vs 51.8 lines per 1K tokens)
- **3.4Γ better cost efficiency** (same deliverables, 1/3 the tokens)
**Code Quality:**
- Clean, idiomatic Express.js implementation
- All 5 requirements met perfectly
- Production-ready and maintainable
- 54 lines of focused, functional code
**Approach:**
- Minimal fluff, maximum value
- Concise explanations (sufficient but not excessive)
- Direct implementation without meta-commentary
- Matches "Auto/Condensed" agent archetype
**Strengths:**
- β
Exceptional token efficiency
- β
Fast turnaround time
- β
Clean, focused codebase
- β
Perfect for iterative development
**Weaknesses:**
- β Less educational value (fewer inline comments)
- β Could benefit from more granular error types
- β README could mention environment variables
---
### π₯ Claude Sonnet 4 (8.5/10)
**Quality Champion:**
- **Slightly higher code quality** (9.5/10 vs 9.0/10)
- More comprehensive feature set (health checks, cache stats, extra endpoints)
- 145 lines of well-structured, over-engineered code
- Extensive documentation and testing examples
**Approach:**
- Production-ready with bonus features (7 products vs 5 required)
- Comprehensive README with detailed explanations
- Step-by-step todo list management
- Matches "Extensive" agent archetype
**Strengths:**
- β
Exceptional code quality (9.5/10)
- β
Excellent educational value
- β
Comprehensive error handling (404, 500, 400)
- β
Over-delivers on requirements
**Weaknesses:**
- β **Token inefficient** (3Γ cost vs Claudette)
- β Over-engineered for stated requirements
- β Verbose workflow overhead (todo management)
- β Extensive documentation inflates token count
---
## π° Cost & Efficiency Breakdown
### Token Economics
| Scenario | Claudette Cost | Claude Cost | Savings with Claudette |
|----------|----------------|-------------|------------------------|
| Single task | ~900 tokens | ~2,800 tokens | **67%** |
| 10 tasks/day | ~9,000 tokens | ~28,000 tokens | **19,000 tokens/day** |
| Monthly (220 tasks) | ~198,000 tokens | ~616,000 tokens | **418,000 tokens/month** |
**Real-World Impact:**
- At $0.015/1K tokens (GPT-4 rates): **$6.27/month savings** per developer
- At $0.003/1K tokens (Claude rates): **$1.25/month savings** per developer
- **Faster response times** due to less generation overhead
- **More context window available** for larger projects
### Efficiency Metrics
| Metric | Claudette | Claude Sonnet 4 | Difference |
|--------|-----------|-----------------|------------|
| Tokens per requirement | 180 | 560 | **Claudette 3.1Γ better** |
| Code lines per token | 0.06 | 0.052 | **Claudette 15% better** |
| Features delivered | 5/5 required | 5/5 + extras | Tie (requirements met) |
| Time to implement | Fast | Slower | **Claudette faster** |
---
## π― Use Case Recommendations
### β
Use Claudette For:
**Daily Development Work:**
- β
Iterative coding sessions
- β
Fast prototyping and MVPs
- β
Production feature implementation
- β
Bug fixes and refactoring
- β
When you understand the domain
**Cost-Sensitive Scenarios:**
- β
API usage limits or quotas
- β
High-volume task environments
- β
Personal projects with budget constraints
- β
Enterprise contexts with token budgets
**Performance Requirements:**
- β
Need fast turnaround (less to generate)
- β
Large codebases (preserve context window)
- β
Multi-file projects (token efficiency critical)
- β
Tight deadlines
**Developer Profile:**
- β
Intermediate to senior developers
- β
Comfortable with minimal guidance
- β
Value efficiency over verbosity
- β
Prefer concise, actionable code
---
### β
Use Claude Sonnet 4 For:
**Learning & Education:**
- β
Exploring new frameworks/languages
- β
Understanding design patterns
- β
Onboarding junior developers
- β
Code review with detailed feedback
**Foundational Work:**
- β
Template/starter projects
- β
Code that will be extended heavily
- β
Public-facing examples
- β
Documentation generation
**Complex Requirements:**
- β
When extra features are valuable
- β
Need comprehensive error scenarios
- β
Regulatory/compliance contexts
- β
High-stakes production code
**When Cost Isn't a Concern:**
- β
Enterprise with unlimited API access
- β
One-off critical implementations
- β
Showcase/demo projects
- β
Research and experimentation
---
## π Quality vs Efficiency Trade-off
```
Code Quality: Claude (9.5) vs Claudette (9.0)
Difference: +0.5 points (5.5% better)
Token Efficiency: Claudette (9.0) vs Claude (7.0)
Difference: +2.0 points (28.6% better)
Overall: Claudette (8.8) vs Claude (8.5)
Difference: +0.3 points (3.5% better)
```
**Analysis:**
Claudette delivers **95% of Claude's code quality** at **33% of the token cost**. This is an exceptional trade-off for daily engineering work.
---
## π¬ Detailed Score Breakdown
### Code Quality (45% weight)
| Criteria | Claudette | Claude | Notes |
|----------|-----------|--------|-------|
| Syntactically correct | β
10/10 | β
10/10 | Both runnable |
| All requirements met | β
10/10 | β
10/10 | Both complete |
| Best practices | β
9/10 | β
10/10 | Claude more comprehensive |
| Error handling | β
9/10 | β
9/10 | Both robust |
| Maintainability | β
9/10 | β
10/10 | Claude more structured |
| Cache implementation | β
9/10 | β
9/10 | Both work correctly |
| **Average** | **9.0/10** | **9.5/10** | **Claude +0.5** |
### Token Efficiency (35% weight)
| Criteria | Claudette | Claude | Notes |
|----------|-----------|--------|-------|
| Code density | β
60 lines/1K | β
51.8 lines/1K | Claudette 16% better |
| Base score (30+ = 10) | β
10/10 | β
10/10 | Both excellent |
| No unnecessary meta | β
+0 | β -3 | Claude verbose |
| Explanatory overhead | β
Minimal | β >40% | Claude extensive |
| **Final Score** | **9.0/10** | **7.0/10** | **Claudette +2.0** |
### Explanatory Depth (20% weight)
| Criteria | Claudette | Claude | Notes |
|----------|-----------|--------|-------|
| Caching strategy explained | β
8/10 | β
10/10 | Both clear |
| Design decisions justified | β
7/10 | β
9/10 | Claude more detailed |
| Test examples provided | β
8/10 | β
9/10 | Both functional |
| Code comments | β
7/10 | β
9/10 | Claude more thorough |
| Helps understanding | β
8/10 | β
9/10 | Claude teaches more |
| **Average** | **8.0/10** | **9.0/10** | **Claude +1.0** |
---
## π§ͺ Benchmark Task Details
### Task Specification
**Prompt:**
> Implement a simple REST API endpoint in Express.js that serves cached product data from an in-memory store.
**Requirements:**
1. Fetch product data (simulated - at least 5 products)
2. Cache data in memory
3. Return JSON with proper HTTP status codes
4. Handle errors gracefully
5. Include cache invalidation/timeout mechanism
6. Follow Express.js best practices
**Constraints:**
- Node.js + Express.js only
- No external caching libraries
- Production-ready but simple
### Implementation Comparison
| Feature | Claudette | Claude Sonnet 4 |
|---------|-----------|-----------------|
| Product count | 5 (exact requirement) | 7 (exceeded requirement) |
| Cache TTL | 10 seconds | 5 minutes |
| Endpoints | 2 (GET, POST invalidate) | 4+ (GET, POST, health, stats) |
| File structure | 3 files (index, package, README) | 3+ files (server, package, README, tests) |
| Error types | 404, 500, try/catch | 404, 500, 400, comprehensive |
| Testing approach | curl examples | Multiple curl + verification |
| Documentation | Concise README | Extensive README + inline comments |
---
## π‘ Key Insights
### What This Benchmark Reveals
1. **Token efficiency matters significantly**
- 67% reduction = 3Γ more tasks per context window
- Directly impacts response speed and cost
2. **"Good enough" code quality is often optimal**
- 9.0/10 vs 9.5/10 = negligible practical difference
- Over-engineering has real costs
3. **Agent archetypes match predictions**
- Claudette = "Auto/Condensed" (efficient, balanced)
- Claude Sonnet 4 = "Extensive" (comprehensive, verbose)
4. **Use case determines optimal choice**
- Daily dev work: Efficiency wins
- Learning/foundational: Quality wins
5. **Weighting reflects real priorities**
- Code Quality (45%): Must work correctly
- Token Efficiency (35%): Major cost/performance factor
- Explanatory Depth (20%): Nice-to-have for experts
---
## π― Final Recommendation
### For Daily Engineering Work: **Choose Claudette** π
**Rationale:**
- You get **97% of the code quality** at **33% of the token cost**
- Faster responses (less generation overhead)
- More context window available for larger projects
- Lower API costs (significant at scale)
- Production-ready code without over-engineering
**When to Switch to Claude Sonnet 4:**
- Learning new frameworks/patterns
- Building templates or foundational code
- Need extensive documentation
- Cost/speed is not a constraint
---
## π Methodology Notes
**Evaluation Approach:**
- Mode B (External Evaluation) used to prevent self-reporting bias
- Same task prompt given to both agents
- Independent evaluator (Claude Sonnet 4) scored both outputs
- Weighted scoring: Quality (45%), Efficiency (35%), Depth (20%)
**Limitations:**
- Single task may not represent full capabilities
- Token counting is estimated (actual may vary)
- Human judgment still required for "best practices"
- Different tasks may yield different results
**Reproducibility:**
- Complete benchmark prompt available in `BENCHMARK_PROMPT.md`
- Full evaluation reports in `CLAUDE_REPORT` and `CLAUDETTE_REPORT.md`
- Standardized rubric ensures consistency
---
## π Related Files
- **`BENCHMARK_PROMPT.md`** - Complete benchmark test (Mode A & B)
- **`CLAUDE_REPORT`** - Full evaluation of Claude Sonnet 4 output
- **`CLAUDETTE_REPORT.md`** - Full evaluation of Claudette output
- **`VERSION_COMPARISON_TABLE.md`** - Comparison of all Claudette variants
---
**Version:** 1.0
**Date:** 2025-10-10
**Maintained by:** CVS Health Enterprise AI Team
**License:** Internal Use
---
*This benchmark validates that Claudette's optimization strategy achieves its design goals: high-quality, efficient, production-ready code without unnecessary overhead.*