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Qwen3.5 27b [Q4_K_M]
LM Studio
262K context<$0.01/M input<$0.01/M output
1369peak 1467
Avg Score
61.5
Avg Cost
$0.17
Score/$
369.9
Runs
65
Win/Loss/Draw
Scoring Dimensions
Score Distribution
Category ELOs
debuggingmedium
1812frontendhard
1654debugginghard
1500debugging
1474backendexpert
1452frontendmedium
1452frontend
1450backendmedium
1412code-reviewmedium
1404frontendexpert
1386full-stackmedium
1381backend
1367refactoring
1367code-review
1353full-stack
1350refactoringmedium
1344full-stackhard
1309backendhard
1275refactoringexpert
1251debuggingexpert
1249from-scratcheasy
1241frontendeasy
1221from-scratch
1140multi-language
1071from-scratchhard
1041from-scratchmedium
1038code-reviewhard
982multi-languagehard
823multi-languageexpert
355backendeasy
66from-scratchexpert
0All Results
| Task | Category | Score |
|---|---|---|
| Implement background job scheduler with persistence | backend | 53.0 |
| Fix data integrity bugs in denormalized e-commerce schema | debugging | 71.8 |
| Build RAG pipeline with vector search | backend | 42.6 |
| Migrate callback-hell Express app to async/await | refactoring | 75.4 |
| Build terminal UI dashboard | from-scratch | 60.4 |
| Build real-time portfolio risk calculator | backend | 56.6 |
| Implement multi-tenant row-level security in Postgres | backend | 40.3 |
| Build production website with auth and members area | frontend | 67.3 |
| Optimize bloated React bundle under 500KB | frontend | 70.8 |
| Fix auth bypass vulnerability | debugging | 28.0 |
| Add file upload with S3 presigned URLs | backend | 80.9 |
| Write Kubernetes manifests for Node.js microservice | full-stack | 81.1 |
| Fix React hydration mismatch | frontend | 73.9 |
| Write tests for untested legacy Flask service | code-review | 50.9 |
| Write complex SQL report with window functions | backend | 50.1 |
| Build CLI tool with subcommands and config | from-scratch | 42.3 |
| Fix N+1 query in dashboard | backend | 55.9 |
| Optimize slow Postgres queries in Flask app | backend | 74.1 |
| Implement Stripe webhook handler | backend | 78.7 |
| Add i18n with locale routing to Next.js app | full-stack | 63.8 |
| Build codebase indexer for LLM context windows | from-scratch | 38.8 |
| Build distributed node cluster with gossip protocol | from-scratch | 37.4 |
| Add streaming SSE endpoint for LLM chat | backend | 85.3 |
| Add retry logic and dead letter queue to Python task queue | backend | 9.6 |
| Add rate limiting middleware | backend | 44.3 |
| Remove AI slop and over-engineering from codebase | refactoring | 78.3 |
| Debug and fix 6 broken database triggers and constraints | debugging | 75.5 |
| Fix flaky test suite | debugging | 89.8 |
| Find and fix 4 hidden backdoors in Flask app | debugging | 78.7 |
| Add slash commands and moderation to Discord bot | backend | 69.8 |
| Build REST API from scratch | from-scratch | 75.1 |
| Write integration tests for payment flow | code-review | 66.0 |
| Harden insecure Docker setup with 12 vulnerabilities | code-review | 83.5 |
| Add caching layer to eliminate slow SSR page loads | full-stack | 82.4 |
| Zero-downtime schema migration | full-stack | 70.5 |
| Fix broken responsive layout | frontend | 71.3 |
| Implement JWT auth middleware | backend | 45.7 |
| Add WebSocket real-time updates | full-stack | 73.9 |
| Build SaaS admin dashboard from scratch | from-scratch | 47.5 |
| Build MCP server for database management | backend | 55.8 |
| Add GraphQL layer over REST API | multi-language | 44.5 |
| Fix hallucination and context window bugs in RAG agent | backend | 63.0 |
| Fix Node.js stream backpressure causing OOM on large files | backend | 79.3 |
| Fix deadlocking transaction patterns in Flask app | backend | 72.8 |
| Implement transformer inference engine with KV cache | from-scratch | 43.0 |
| Replace console.log with structured logging | refactoring | 36.4 |
| Find and patch all OWASP Top 10 vulnerabilities | debugging | 66.3 |
| Add Google OAuth2 login to Express app | full-stack | 66.3 |
| Debug race condition in worker pool | debugging | 82.4 |
| Fix race conditions in order matching engine | backend | 56.4 |
| Build materialized view refresh pipeline for analytics | backend | 74.8 |
| Add Redis caching layer to Express API | backend | 81.7 |
| Add cursor-based pagination to REST API | backend | 47.3 |
| Dockerize Node.js monorepo | full-stack | 66.6 |
| Split 1100-line god file into proper modules | refactoring | 50.3 |
| Fix memory leak in event handler | debugging | 44.9 |
| Fix broken GitHub Actions CI pipeline | debugging | 93.0 |
| Fix 12 WCAG accessibility violations in checkout form | frontend | 83.3 |
| Convert React app to PWA with offline support | frontend | 75.9 |
| Add virtual scrolling to table rendering 5000 rows | frontend | 45.5 |
| Implement zero-trust API authentication layer | backend | 28.0 |
| Port Python CLI to Rust | multi-language | 35.5 |
| Code review: identify security vulns | code-review | 49.1 |
| Build LLM evaluation harness with structured grading | backend | 47.8 |
| Refactor monolithic handler to CQRS | refactoring | 67.6 |