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GLM 5
Z.ai
200K context$1.00/M input$3.20/M output
1539peak 1650
Avg Score
73.6
Avg Cost
$0.09
Score/$
864.9
Runs
65
Win/Loss/Draw
Scoring Dimensions
Score Distribution
Category ELOs
backendeasy
2092frontendexpert
2076from-scratchexpert
2076refactoringexpert
2059multi-languagehard
1802from-scratchmedium
1748debuggingmedium
1728full-stackhard
1656backendmedium
1639debugginghard
1635full-stack
1633full-stackmedium
1609debugging
1593frontendhard
1593backend
1572frontend
1562backendhard
1538frontendmedium
1538from-scratch
1535debuggingexpert
1533from-scratchhard
1528frontendeasy
1519backendexpert
1494refactoring
1456refactoringmedium
1357multi-language
1342code-reviewhard
1334code-review
1310code-reviewmedium
1283from-scratcheasy
1150multi-languageexpert
278All Results
| Task | Category | Score |
|---|---|---|
| Build codebase indexer for LLM context windows | from-scratch | 50.1 |
| Fix N+1 query in dashboard | backend | 57.2 |
| Fix deadlocking transaction patterns in Flask app | backend | 70.0 |
| Fix 12 WCAG accessibility violations in checkout form | frontend | 72.6 |
| Add rate limiting middleware | backend | 82.5 |
| Convert React app to PWA with offline support | frontend | 60.5 |
| Dockerize Node.js monorepo | full-stack | 77.0 |
| Fix flaky test suite | debugging | 86.7 |
| Add Redis caching layer to Express API | backend | 85.8 |
| Optimize bloated React bundle under 500KB | frontend | 83.0 |
| Debug and fix 6 broken database triggers and constraints | debugging | 88.8 |
| Fix broken GitHub Actions CI pipeline | debugging | 82.9 |
| Replace console.log with structured logging | refactoring | 57.2 |
| Refactor monolithic handler to CQRS | refactoring | 81.0 |
| Fix data integrity bugs in denormalized e-commerce schema | debugging | 79.7 |
| Add Google OAuth2 login to Express app | full-stack | 84.6 |
| Port Python CLI to Rust | multi-language | 34.3 |
| Build CLI tool with subcommands and config | from-scratch | 68.3 |
| Build terminal UI dashboard | from-scratch | 58.8 |
| Fix Node.js stream backpressure causing OOM on large files | backend | 89.8 |
| Fix memory leak in event handler | debugging | 82.4 |
| Harden insecure Docker setup with 12 vulnerabilities | code-review | 73.3 |
| Zero-downtime schema migration | full-stack | 81.9 |
| Add retry logic and dead letter queue to Python task queue | backend | 76.5 |
| Add file upload with S3 presigned URLs | backend | 85.2 |
| Debug race condition in worker pool | debugging | 91.8 |
| Add virtual scrolling to table rendering 5000 rows | frontend | 82.4 |
| Add caching layer to eliminate slow SSR page loads | full-stack | 82.0 |
| Implement transformer inference engine with KV cache | from-scratch | 85.5 |
| Implement zero-trust API authentication layer | backend | 52.8 |
| Build MCP server for database management | backend | 83.6 |
| Fix hallucination and context window bugs in RAG agent | backend | 64.8 |
| Add streaming SSE endpoint for LLM chat | backend | 84.2 |
| Migrate callback-hell Express app to async/await | refactoring | 69.2 |
| Build LLM evaluation harness with structured grading | backend | 79.7 |
| Fix race conditions in order matching engine | backend | 79.2 |
| Add WebSocket real-time updates | full-stack | 79.5 |
| Remove AI slop and over-engineering from codebase | refactoring | 84.5 |
| Write Kubernetes manifests for Node.js microservice | full-stack | 84.8 |
| Build REST API from scratch | from-scratch | 77.3 |
| Add i18n with locale routing to Next.js app | full-stack | 73.5 |
| Write complex SQL report with window functions | backend | 62.6 |
| Fix auth bypass vulnerability | debugging | 88.8 |
| Implement JWT auth middleware | backend | 53.0 |
| Add cursor-based pagination to REST API | backend | 81.8 |
| Optimize slow Postgres queries in Flask app | backend | 88.0 |
| Add GraphQL layer over REST API | multi-language | 80.9 |
| Implement multi-tenant row-level security in Postgres | backend | 55.2 |
| Find and fix 4 hidden backdoors in Flask app | debugging | 91.3 |
| Build distributed node cluster with gossip protocol | from-scratch | 70.8 |
| Implement Stripe webhook handler | backend | 78.3 |
| Build real-time portfolio risk calculator | backend | 71.0 |
| Find and patch all OWASP Top 10 vulnerabilities | debugging | 70.0 |
| Build materialized view refresh pipeline for analytics | backend | 70.3 |
| Fix broken responsive layout | frontend | 77.0 |
| Build production website with auth and members area | frontend | 72.1 |
| Split 1100-line god file into proper modules | refactoring | 60.5 |
| Add slash commands and moderation to Discord bot | backend | 74.3 |
| Implement background job scheduler with persistence | backend | 71.7 |
| Build RAG pipeline with vector search | backend | 60.1 |
| Fix React hydration mismatch | frontend | 82.2 |
| Write tests for untested legacy Flask service | code-review | 59.5 |
| Code review: identify security vulns | code-review | 27.1 |
| Build SaaS admin dashboard from scratch | from-scratch | 61.1 |
| Write integration tests for payment flow | code-review | 71.2 |