GLM 4.6

Z.ai

200K context$0.60/M input$2.20/M output

1357peak 1373

Avg Score

64.4

Avg Cost

$0.08

Score/$

797.3

Runs

Win/Loss/Draw

Scoring Dimensions

Score Distribution

Category ELOs

from-scratchexpert

1704

frontendhard

1623

code-reviewhard

1605

full-stackmedium

1489

debugginghard

1487

debuggingexpert

1440

full-stack

1430

debugging

1405

frontendexpert

1403

multi-languagehard

1402

frontend

1397

full-stackhard

1375

frontendmedium

1369

backendmedium

1366

refactoringmedium

1359

multi-language

1355

refactoring

1347

code-review

1332

backend

1319

backendexpert

1295

backendhard

1293

from-scratch

1291

code-reviewmedium

1259

frontendeasy

1220

from-scratchhard

1198

from-scratcheasy

1179

multi-languageexpert

1115

debuggingmedium

1106

from-scratchmedium

794

refactoringexpert

653

backendeasy

250

All Results

Task	Category	Score	Duration	Cost
Remove AI slop and over-engineering from codebase	refactoring	45.0	1m 22s	$0.06
Add Redis caching layer to Express API	backend	72.3	1m 14s	$0.07
Find and patch all OWASP Top 10 vulnerabilities	debugging	71.1	1m 2s	$0.04
Add Google OAuth2 login to Express app	full-stack	72.8	1m 29s	$0.06
Convert React app to PWA with offline support	frontend	70.7	1m 20s	$0.04
Implement background job scheduler with persistence	backend	41.1	1m 52s	$0.04
Build distributed node cluster with gossip protocol	from-scratch	38.5	1m 13s	$0.01
Build LLM evaluation harness with structured grading	backend	36.4	4m 37s	$0.07
Build RAG pipeline with vector search	backend	44.6	43.4s	$0.02
Add WebSocket real-time updates	full-stack	75.8	3m 55s	$0.23
Fix React hydration mismatch	frontend	84.5	36.4s	$0.06
Build production website with auth and members area	frontend	66.0	5m 38s	$0.08
Debug race condition in worker pool	debugging	87.3	9.5s	<$0.01
Write complex SQL report with window functions	backend	76.1	2m 46s	$0.04
Build codebase indexer for LLM context windows	from-scratch	50.6	2m 10s	$0.03
Fix data integrity bugs in denormalized e-commerce schema	debugging	86.1	27.0s	<$0.01
Fix auth bypass vulnerability	debugging	89.5	34.5s	$0.05
Fix 12 WCAG accessibility violations in checkout form	frontend	80.4	1m 8s	$0.04
Implement Stripe webhook handler	backend	73.0	36.6s	$0.06
Optimize slow Postgres queries in Flask app	backend	52.0	1m 23s	$0.03
Debug and fix 6 broken database triggers and constraints	debugging	59.6	48.2s	$0.02
Implement multi-tenant row-level security in Postgres	backend	65.5	45.6s	$0.03
Fix broken GitHub Actions CI pipeline	debugging	76.8	36.6s	$0.06
Build terminal UI dashboard	from-scratch	53.1	1m 5s	$0.02
Add rate limiting middleware	backend	37.6	49.1s	$0.02
Add i18n with locale routing to Next.js app	full-stack	69.0	2m 10s	$0.06
Build MCP server for database management	backend	76.8	44.1s	$0.02
Fix broken responsive layout	frontend	69.1	23.7s	$0.04
Add cursor-based pagination to REST API	backend	81.6	45.7s	$0.06
Write tests for untested legacy Flask service	code-review	41.1	19m 59s	$1.92
Fix deadlocking transaction patterns in Flask app	backend	71.9	46.3s	$0.01
Build real-time portfolio risk calculator	backend	62.6	1m 30s	$0.04
Fix race conditions in order matching engine	backend	59.3	1m 42s	$0.04
Write integration tests for payment flow	code-review	75.3	2m 27s	$0.08
Fix hallucination and context window bugs in RAG agent	backend	65.1	2m 22s	$0.04
Add caching layer to eliminate slow SSR page loads	full-stack	82.0	37.7s	$0.04
Zero-downtime schema migration	full-stack	65.3	38.1s	$0.02
Build materialized view refresh pipeline for analytics	backend	50.4	45.1s	$0.02
Fix flaky test suite	debugging	51.2	37.7s	$0.01
Add retry logic and dead letter queue to Python task queue	backend	57.8	1m 5s	$0.02
Split 1100-line god file into proper modules	refactoring	63.4	1m 36s	$0.04
Add streaming SSE endpoint for LLM chat	backend	80.5	1m 14s	$0.06
Add slash commands and moderation to Discord bot	backend	63.2	57.5s	$0.02
Build SaaS admin dashboard from scratch	from-scratch	47.3	2m 32s	$0.05
Migrate callback-hell Express app to async/await	refactoring	55.7	1m 53s	$0.08
Optimize bloated React bundle under 500KB	frontend	61.2	1m 35s	$0.05
Harden insecure Docker setup with 12 vulnerabilities	code-review	75.1	26.0s	$0.03
Build CLI tool with subcommands and config	from-scratch	53.2	1m 33s	$0.04
Find and fix 4 hidden backdoors in Flask app	debugging	78.0	35.7s	$0.02
Implement zero-trust API authentication layer	backend	68.5	1m 52s	$0.05
Add virtual scrolling to table rendering 5000 rows	frontend	42.1	37.7s	$0.06
Fix Node.js stream backpressure causing OOM on large files	backend	85.5	35.1s	$0.06
Build REST API from scratch	from-scratch	73.4	45.2s	$0.01
Dockerize Node.js monorepo	full-stack	71.8	26.6s	$0.03
Add file upload with S3 presigned URLs	backend	51.4	1m 17s	$0.07
Replace console.log with structured logging	refactoring	55.7	1m 17s	$0.07
Fix memory leak in event handler	debugging	74.5	33.7s	$0.06
Write Kubernetes manifests for Node.js microservice	full-stack	85.8	39.2s	$0.03
Port Python CLI to Rust	multi-language	46.7	7m 10s	$0.61
Implement transformer inference engine with KV cache	from-scratch	80.7	24.6s	<$0.01
Code review: identify security vulns	code-review	72.4	53.5s	$0.06
Refactor monolithic handler to CQRS	refactoring	45.8	1m 4s	$0.06
Fix N+1 query in dashboard	backend	56.5	25.1s	<$0.01
Implement JWT auth middleware	backend	41.5	1m 3s	$0.06
Add GraphQL layer over REST API	multi-language	72.8	27.9s	<$0.01