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GPT 5.1 Codex Mini
OpenAI
400K context$3.00/M input$15.00/M output
1587peak 1706
Avg Score
75.9
Avg Cost
$0.60
Score/$
125.8
Runs
70
Win/Loss/Draw
Scoring Dimensions
Score Distribution
Category ELOs
multi-languageexpert
2980from-scratchmedium
2339frontendexpert
2172frontendhard
2031from-scratchexpert
2013backendeasy
1959code-reviewhard
1922from-scratcheasy
1913from-scratchhard
1900from-scratch
1832multi-language
1816multi-languagehard
1770debuggingmedium
1756code-reviewmedium
1728code-review
1711full-stackhard
1670full-stack
1646full-stackmedium
1623backendexpert
1622backendhard
1574frontend
1573refactoringmedium
1562refactoring
1560backend
1544frontendmedium
1512refactoringexpert
1504debugging
1497debuggingexpert
1489frontendeasy
1481backendmedium
1476debugginghard
1406backendmaster
648frontendmaster
0All Results
| Task | Category | Score |
|---|---|---|
| Migrate callback-hell Express app to async/await | refactoring | 62.3 |
| Fix and extend Chrome browser extension | frontend | — |
| Build interactive data visualization dashboard | frontend | — |
| Add WebSocket real-time updates | full-stack | 63.1 |
| Build 3D browser game with physics and multiplayer sync | frontend | 33.1 |
| Fix Node.js stream backpressure causing OOM on large files | backend | 47.0 |
| Build multi-tool LLM agent runtime | backend | — |
| Implement JWT auth middleware | backend | — |
| Migrate Express monolith to modular architecture | backend | 29.3 |
| Fix broken GitHub Actions CI pipeline | debugging | 92.2 |
| Harden insecure Docker setup with 12 vulnerabilities | code-review | 88.7 |
| Split 1100-line god file into proper modules | refactoring | 0.0 |
| Write Kubernetes manifests for Node.js microservice | full-stack | 85.7 |
| Replace console.log with structured logging | refactoring | 55.1 |
| Add file upload with S3 presigned URLs | backend | 49.4 |
| Fix auth bypass vulnerability | debugging | 72.4 |
| Code review: identify security vulns | code-review | 58.4 |
| Add retry logic and dead letter queue to Python task queue | backend | 82.0 |
| Add caching layer to eliminate slow SSR page loads | full-stack | 82.5 |
| Fix broken responsive layout | frontend | 76.1 |
| Add streaming SSE endpoint for LLM chat | backend | 48.7 |
| Build codebase indexer for LLM context windows | from-scratch | 83.6 |
| Dockerize Node.js monorepo | full-stack | 79.7 |
| Build RAG pipeline with vector search | backend | 85.0 |
| Add i18n with locale routing to Next.js app | full-stack | 81.5 |
| Remove AI slop and over-engineering from codebase | refactoring | 90.9 |
| Optimize bloated React bundle under 500KB | frontend | 79.4 |
| Implement multi-tenant row-level security in Postgres | backend | 82.5 |
| Implement zero-trust API authentication layer | backend | 77.7 |
| Find and patch all OWASP Top 10 vulnerabilities | debugging | 77.8 |
| Build distributed node cluster with gossip protocol | from-scratch | 72.5 |
| Convert React app to PWA with offline support | frontend | 79.7 |
| Find and fix 4 hidden backdoors in Flask app | debugging | 87.0 |
| Build production website with auth and members area | frontend | 79.3 |
| Build SaaS admin dashboard from scratch | from-scratch | 86.4 |
| Build MCP server for database management | backend | 69.2 |
| Implement transformer inference engine with KV cache | from-scratch | 86.6 |
| Implement background job scheduler with persistence | backend | 82.0 |
| Build CLI tool with subcommands and config | from-scratch | 82.9 |
| Build LLM evaluation harness with structured grading | backend | 61.5 |
| Build real-time portfolio risk calculator | backend | 72.2 |
| Add Redis caching layer to Express API | backend | 80.0 |
| Fix race conditions in order matching engine | backend | 90.9 |
| Debug and fix 6 broken database triggers and constraints | debugging | 79.8 |
| Fix data integrity bugs in denormalized e-commerce schema | debugging | 80.8 |
| Write complex SQL report with window functions | backend | 79.5 |
| Build materialized view refresh pipeline for analytics | backend | 75.3 |
| Fix deadlocking transaction patterns in Flask app | backend | 79.8 |
| Fix hallucination and context window bugs in RAG agent | backend | 77.3 |
| Write tests for untested legacy Flask service | code-review | 92.5 |
| Add Google OAuth2 login to Express app | full-stack | 82.0 |
| Optimize slow Postgres queries in Flask app | backend | 81.0 |
| Add slash commands and moderation to Discord bot | backend | 83.8 |
| Add virtual scrolling to table rendering 5000 rows | frontend | 81.8 |
| Fix 12 WCAG accessibility violations in checkout form | frontend | 90.4 |
| Add GraphQL layer over REST API | multi-language | 80.5 |
| Write integration tests for payment flow | code-review | 81.0 |
| Zero-downtime schema migration | full-stack | 76.5 |
| Add rate limiting middleware | backend | 83.5 |
| Implement Stripe webhook handler | backend | 80.5 |
| Port Python CLI to Rust | multi-language | 90.3 |
| Fix flaky test suite | debugging | 88.4 |
| Add cursor-based pagination to REST API | backend | 87.9 |
| Fix N+1 query in dashboard | backend | 82.9 |
| Fix memory leak in event handler | debugging | 85.8 |
| Refactor monolithic handler to CQRS | refactoring | 72.7 |
| Debug race condition in worker pool | debugging | 76.6 |
| Fix React hydration mismatch | frontend | 69.2 |
| Build terminal UI dashboard | from-scratch | 82.2 |
| Build REST API from scratch | from-scratch | 90.5 |