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Kimi K2.6
OpenRouter
262K context$0.73/M input$3.49/M output
1678peak 1694
Avg Score
80.8
Avg Cost
$0.47
Score/$
170.7
Runs
70
Win/Loss/Draw
Scoring Dimensions
Score Distribution
Category ELOs
multi-languagehard
2381refactoringexpert
2312code-reviewhard
2248from-scratchmedium
2238backendeasy
2201from-scratcheasy
2076code-reviewmedium
1830code-review
1829frontendhard
1820backendhard
1802multi-language
1796refactoring
1778from-scratchhard
1772refactoringmedium
1761debuggingmedium
1761debuggingexpert
1747multi-languageexpert
1740backendexpert
1716from-scratch
1713backend
1696full-stackhard
1695from-scratchexpert
1694frontendeasy
1679frontendexpert
1675frontendmaster
1662frontend
1649full-stack
1648backendmedium
1643frontendmedium
1641debugging
1608full-stackmedium
1594debugginghard
1504backendmaster
1230All Results
| Task | Category | Score |
|---|---|---|
| Add streaming SSE endpoint for LLM chat | backend | 84.3 |
| Replace console.log with structured logging | refactoring | 73.3 |
| Fix and extend Chrome browser extension | frontend | 63.6 |
| Migrate Express monolith to modular architecture | backend | 70.2 |
| Build real-time portfolio risk calculator | backend | 41.7 |
| Implement zero-trust API authentication layer | backend | 81.7 |
| Add file upload with S3 presigned URLs | backend | 70.3 |
| Write tests for untested legacy Flask service | code-review | 88.1 |
| Optimize slow Postgres queries in Flask app | backend | 87.1 |
| Build production website with auth and members area | frontend | 70.5 |
| Build SaaS admin dashboard from scratch | from-scratch | 62.1 |
| Add slash commands and moderation to Discord bot | backend | 75.7 |
| Fix deadlocking transaction patterns in Flask app | backend | 86.6 |
| Implement background job scheduler with persistence | backend | 72.5 |
| Dockerize Node.js monorepo | full-stack | 81.9 |
| Migrate callback-hell Express app to async/await | refactoring | 85.3 |
| Build LLM evaluation harness with structured grading | backend | 82.9 |
| Add Redis caching layer to Express API | backend | 86.6 |
| Fix race conditions in order matching engine | backend | 90.9 |
| Remove AI slop and over-engineering from codebase | refactoring | 86.3 |
| Fix flaky test suite | debugging | 87.0 |
| Split 1100-line god file into proper modules | refactoring | 86.4 |
| Write Kubernetes manifests for Node.js microservice | full-stack | 86.8 |
| Build MCP server for database management | backend | 87.0 |
| Implement JWT auth middleware | backend | 82.4 |
| Build CLI tool with subcommands and config | from-scratch | 70.5 |
| Add GraphQL layer over REST API | multi-language | 91.2 |
| Add WebSocket real-time updates | full-stack | 79.3 |
| Fix N+1 query in dashboard | backend | 78.3 |
| Code review: identify security vulns | code-review | 78.7 |
| Add caching layer to eliminate slow SSR page loads | full-stack | 78.3 |
| Build RAG pipeline with vector search | backend | 87.5 |
| Build materialized view refresh pipeline for analytics | backend | 81.7 |
| Build codebase indexer for LLM context windows | from-scratch | 81.3 |
| Write integration tests for payment flow | code-review | 84.8 |
| Build distributed node cluster with gossip protocol | from-scratch | 81.6 |
| Fix broken GitHub Actions CI pipeline | debugging | 93.0 |
| Add i18n with locale routing to Next.js app | full-stack | 82.2 |
| Build multi-tool LLM agent runtime | backend | 67.3 |
| Fix 12 WCAG accessibility violations in checkout form | frontend | 84.7 |
| Port Python CLI to Rust | multi-language | 62.2 |
| Convert React app to PWA with offline support | frontend | 81.3 |
| Implement multi-tenant row-level security in Postgres | backend | 83.2 |
| Find and patch all OWASP Top 10 vulnerabilities | debugging | 80.5 |
| Find and fix 4 hidden backdoors in Flask app | debugging | 89.3 |
| Fix auth bypass vulnerability | debugging | 92.2 |
| Fix data integrity bugs in denormalized e-commerce schema | debugging | 88.4 |
| Write complex SQL report with window functions | backend | 87.5 |
| Fix hallucination and context window bugs in RAG agent | backend | 81.8 |
| Fix memory leak in event handler | debugging | 52.2 |
| Debug and fix 6 broken database triggers and constraints | debugging | 86.8 |
| Build 3D browser game with physics and multiplayer sync | frontend | 85.0 |
| Optimize bloated React bundle under 500KB | frontend | 71.4 |
| Implement transformer inference engine with KV cache | from-scratch | 80.5 |
| Zero-downtime schema migration | full-stack | 81.7 |
| Build interactive data visualization dashboard | frontend | 79.1 |
| Add retry logic and dead letter queue to Python task queue | backend | 82.8 |
| Build terminal UI dashboard | from-scratch | 77.3 |
| Refactor monolithic handler to CQRS | refactoring | 82.5 |
| Implement Stripe webhook handler | backend | 87.5 |
| Add Google OAuth2 login to Express app | full-stack | 80.8 |
| Fix React hydration mismatch | frontend | 84.4 |
| Fix Node.js stream backpressure causing OOM on large files | backend | 91.7 |
| Build REST API from scratch | from-scratch | 87.3 |
| Harden insecure Docker setup with 12 vulnerabilities | code-review | 93.5 |
| Add virtual scrolling to table rendering 5000 rows | frontend | 82.4 |
| Fix broken responsive layout | frontend | 77.7 |
| Debug race condition in worker pool | debugging | 84.8 |
| Add rate limiting middleware | backend | 86.8 |
| Add cursor-based pagination to REST API | backend | 80.9 |