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GLM 4.6
Z.ai
200K context$0.60/M input$2.20/M output
1364peak 1496
Avg Score
64.4
Avg Cost
$0.08
Score/$
797.3
Runs
65
Win/Loss/Draw
Scoring Dimensions
Score Distribution
Category ELOs
multi-languageexpert
1818from-scratchexpert
1645debugginghard
1556frontendexpert
1527frontendhard
1516code-reviewhard
1506multi-language
1456frontend
1435frontendeasy
1433debugging
1429full-stackmedium
1427frontendmedium
1403full-stack
1399debuggingexpert
1390backendmedium
1378code-review
1374full-stackhard
1364refactoringmedium
1348code-reviewmedium
1347from-scratchhard
1336refactoring
1318backend
1310multi-languagehard
1305from-scratch
1304backendexpert
1301backendhard
1242debuggingmedium
1100from-scratcheasy
904from-scratchmedium
571refactoringexpert
342backendeasy
27All Results
| Task | Category | Score |
|---|---|---|
| Remove AI slop and over-engineering from codebase | refactoring | 45.0 |
| Add Redis caching layer to Express API | backend | 72.3 |
| Find and patch all OWASP Top 10 vulnerabilities | debugging | 71.1 |
| Add Google OAuth2 login to Express app | full-stack | 72.8 |
| Convert React app to PWA with offline support | frontend | 70.7 |
| Implement background job scheduler with persistence | backend | 41.1 |
| Build distributed node cluster with gossip protocol | from-scratch | 38.5 |
| Build LLM evaluation harness with structured grading | backend | 36.4 |
| Build RAG pipeline with vector search | backend | 44.6 |
| Add WebSocket real-time updates | full-stack | 75.8 |
| Fix React hydration mismatch | frontend | 84.5 |
| Build production website with auth and members area | frontend | 66.0 |
| Debug race condition in worker pool | debugging | 87.3 |
| Write complex SQL report with window functions | backend | 76.1 |
| Build codebase indexer for LLM context windows | from-scratch | 50.6 |
| Fix data integrity bugs in denormalized e-commerce schema | debugging | 86.1 |
| Fix auth bypass vulnerability | debugging | 89.5 |
| Fix 12 WCAG accessibility violations in checkout form | frontend | 80.4 |
| Implement Stripe webhook handler | backend | 73.0 |
| Optimize slow Postgres queries in Flask app | backend | 52.0 |
| Debug and fix 6 broken database triggers and constraints | debugging | 59.6 |
| Implement multi-tenant row-level security in Postgres | backend | 65.5 |
| Fix broken GitHub Actions CI pipeline | debugging | 76.8 |
| Build terminal UI dashboard | from-scratch | 53.1 |
| Add rate limiting middleware | backend | 37.6 |
| Add i18n with locale routing to Next.js app | full-stack | 69.0 |
| Build MCP server for database management | backend | 76.8 |
| Fix broken responsive layout | frontend | 69.1 |
| Add cursor-based pagination to REST API | backend | 81.6 |
| Write tests for untested legacy Flask service | code-review | 41.1 |
| Fix deadlocking transaction patterns in Flask app | backend | 71.9 |
| Build real-time portfolio risk calculator | backend | 62.6 |
| Fix race conditions in order matching engine | backend | 59.3 |
| Write integration tests for payment flow | code-review | 75.3 |
| Fix hallucination and context window bugs in RAG agent | backend | 65.1 |
| Add caching layer to eliminate slow SSR page loads | full-stack | 82.0 |
| Zero-downtime schema migration | full-stack | 65.3 |
| Build materialized view refresh pipeline for analytics | backend | 50.4 |
| Fix flaky test suite | debugging | 51.2 |
| Add retry logic and dead letter queue to Python task queue | backend | 57.8 |
| Split 1100-line god file into proper modules | refactoring | 63.4 |
| Add streaming SSE endpoint for LLM chat | backend | 80.5 |
| Add slash commands and moderation to Discord bot | backend | 63.2 |
| Build SaaS admin dashboard from scratch | from-scratch | 47.3 |
| Migrate callback-hell Express app to async/await | refactoring | 55.7 |
| Optimize bloated React bundle under 500KB | frontend | 61.2 |
| Harden insecure Docker setup with 12 vulnerabilities | code-review | 75.1 |
| Build CLI tool with subcommands and config | from-scratch | 53.2 |
| Find and fix 4 hidden backdoors in Flask app | debugging | 78.0 |
| Implement zero-trust API authentication layer | backend | 68.5 |
| Add virtual scrolling to table rendering 5000 rows | frontend | 42.1 |
| Fix Node.js stream backpressure causing OOM on large files | backend | 85.5 |
| Build REST API from scratch | from-scratch | 73.4 |
| Dockerize Node.js monorepo | full-stack | 71.8 |
| Add file upload with S3 presigned URLs | backend | 51.4 |
| Replace console.log with structured logging | refactoring | 55.7 |
| Fix memory leak in event handler | debugging | 74.5 |
| Write Kubernetes manifests for Node.js microservice | full-stack | 85.8 |
| Port Python CLI to Rust | multi-language | 46.7 |
| Implement transformer inference engine with KV cache | from-scratch | 80.7 |
| Code review: identify security vulns | code-review | 72.4 |
| Refactor monolithic handler to CQRS | refactoring | 45.8 |
| Fix N+1 query in dashboard | backend | 56.5 |
| Implement JWT auth middleware | backend | 41.5 |
| Add GraphQL layer over REST API | multi-language | 72.8 |