Qwen3.5 122b A10b

OpenRouter

262K context$0.40/M input$3.20/M output

1416peak 1432

Avg Score

68.0

Avg Cost

$0.05

Score/$

1425.9

Runs

Win/Loss/Draw

Scoring Dimensions

Score Distribution

Category ELOs

multi-languagehard

1844

from-scratchexpert

1704

code-reviewhard

1630

debuggingexpert

1578

debugginghard

1561

frontendhard

1518

debugging

1515

full-stackhard

1509

backendmedium

1508

frontendmedium

1486

full-stack

1462

refactoringmedium

1452

frontend

1449

refactoring

1428

debuggingmedium

1407

backend

1405

full-stackmedium

1382

code-review

1362

backendexpert

1358

backendhard

1351

multi-language

1334

frontendexpert

1295

code-reviewmedium

1290

frontendeasy

1288

from-scratch

1283

from-scratcheasy

1225

from-scratchhard

1170

refactoringexpert

799

from-scratchmedium

774

multi-languageexpert

309

backendeasy

250

All Results

Task	Category	Score	Duration	Cost
Build LLM evaluation harness with structured grading	backend	67.3	2m 22s	$0.07
Fix React hydration mismatch	frontend	79.5	38.3s	$0.05
Build SaaS admin dashboard from scratch	from-scratch	54.2	2m 35s	$0.08
Add i18n with locale routing to Next.js app	full-stack	70.0	1m 13s	$0.06
Build distributed node cluster with gossip protocol	from-scratch	39.8	1m 1s	$0.03
Add rate limiting middleware	backend	35.3	30.2s	$0.02
Add streaming SSE endpoint for LLM chat	backend	82.5	34.4s	$0.05
Add GraphQL layer over REST API	multi-language	80.5	31.7s	$0.05
Add caching layer to eliminate slow SSR page loads	full-stack	77.3	33.0s	$0.04
Implement multi-tenant row-level security in Postgres	backend	34.6	2m 29s	$0.11
Add slash commands and moderation to Discord bot	backend	60.6	1m 21s	$0.04
Build REST API from scratch	from-scratch	74.3	20.8s	$0.01
Port Python CLI to Rust	multi-language	33.8	48.5s	$0.03
Add virtual scrolling to table rendering 5000 rows	frontend	82.8	35.3s	$0.05
Code review: identify security vulns	code-review	37.2	40.2s	$0.05
Build codebase indexer for LLM context windows	from-scratch	37.3	1m 7s	$0.04
Fix Node.js stream backpressure causing OOM on large files	backend	88.3	22.1s	$0.04
Dockerize Node.js monorepo	full-stack	67.1	22.0s	$0.02
Fix broken GitHub Actions CI pipeline	debugging	85.9	27.4s	$0.05
Optimize slow Postgres queries in Flask app	backend	71.1	43.0s	$0.02
Convert React app to PWA with offline support	frontend	71.6	45.9s	$0.04
Replace console.log with structured logging	refactoring	54.5	1m 4s	$0.06
Build MCP server for database management	backend	82.4	56.6s	$0.03
Implement Stripe webhook handler	backend	61.5	4m 24s	$0.18
Refactor monolithic handler to CQRS	refactoring	49.7	27.0s	$0.03
Add Redis caching layer to Express API	backend	84.2	36.1s	$0.05
Fix broken responsive layout	frontend	70.0	26.1s	$0.03
Implement JWT auth middleware	backend	47.9	26.7s	$0.04
Add retry logic and dead letter queue to Python task queue	backend	67.2	1m 14s	$0.05
Implement transformer inference engine with KV cache	from-scratch	80.7	29.2s	$0.02
Implement background job scheduler with persistence	backend	50.0	2m 3s	$0.07
Find and patch all OWASP Top 10 vulnerabilities	debugging	65.5	1m 1s	$0.05
Add cursor-based pagination to REST API	backend	82.8	25.9s	$0.04
Optimize bloated React bundle under 500KB	frontend	64.5	1m 34s	$0.08
Implement zero-trust API authentication layer	backend	71.3	57.5s	$0.05
Fix deadlocking transaction patterns in Flask app	backend	57.8	1m 4s	$0.03
Zero-downtime schema migration	full-stack	82.9	10.5s	<$0.01
Build real-time portfolio risk calculator	backend	55.6	1m 54s	$0.06
Fix auth bypass vulnerability	debugging	87.0	28.3s	$0.04
Find and fix 4 hidden backdoors in Flask app	debugging	86.2	15.9s	$0.01
Write integration tests for payment flow	code-review	75.5	2m 53s	$0.12
Fix flaky test suite	debugging	70.5	33.3s	$0.02
Fix race conditions in order matching engine	backend	86.5	42.3s	$0.02
Split 1100-line god file into proper modules	refactoring	71.2	28.5s	$0.03
Harden insecure Docker setup with 12 vulnerabilities	code-review	81.0	14.1s	$0.02
Debug and fix 6 broken database triggers and constraints	debugging	90.9	35.4s	$0.02
Remove AI slop and over-engineering from codebase	refactoring	87.5	34.5s	$0.03
Build RAG pipeline with vector search	backend	48.5	53.5s	$0.03
Fix N+1 query in dashboard	backend	52.4	24.8s	$0.01
Add Google OAuth2 login to Express app	full-stack	78.3	55.0s	$0.06
Migrate callback-hell Express app to async/await	refactoring	63.5	45.3s	$0.03
Build terminal UI dashboard	from-scratch	51.5	1m 25s	$0.04
Fix 12 WCAG accessibility violations in checkout form	frontend	79.0	58.4s	$0.05
Fix data integrity bugs in denormalized e-commerce schema	debugging	82.4	40.5s	$0.03
Write complex SQL report with window functions	backend	75.0	46.1s	$0.02
Add WebSocket real-time updates	full-stack	67.6	37.0s	$0.05
Debug race condition in worker pool	debugging	88.8	5.7s	<$0.01
Fix hallucination and context window bugs in RAG agent	backend	48.3	1m 55s	$0.06
Add file upload with S3 presigned URLs	backend	82.0	39.1s	$0.05
Write tests for untested legacy Flask service	code-review	56.6	4m 12s	$0.13
Fix memory leak in event handler	debugging	80.3	28.9s	$0.05
Build CLI tool with subcommands and config	from-scratch	53.0	3m 15s	$0.09
Build production website with auth and members area	frontend	62.5	6m 17s	$0.18
Build materialized view refresh pipeline for analytics	backend	71.6	1m 18s	$0.04
Write Kubernetes manifests for Node.js microservice	full-stack	85.0	14.6s	$0.02