Minimax M2.1

OpenRouter

197K context$0.27/M input$0.95/M output

1394peak 1410

Avg Score

66.4

Avg Cost

$0.04

Score/$

1700.7

Runs

Win/Loss/Draw

Scoring Dimensions

Score Distribution

Category ELOs

code-reviewhard

2307

refactoringexpert

2220

from-scratchexpert

1745

debugginghard

1557

debuggingmedium

1557

debuggingexpert

1554

debugging

1535

full-stackhard

1532

refactoring

1479

frontendmedium

1471

backendeasy

1440

backendmedium

1420

full-stack

1409

frontend

1392

backendhard

1391

code-review

1390

refactoringmedium

1379

backend

1350

multi-language

1305

from-scratch

1285

frontendeasy

1262

from-scratcheasy

1249

code-reviewmedium

1217

frontendhard

1186

full-stackmedium

1177

multi-languageexpert

1175

from-scratchhard

1111

backendexpert

1104

from-scratchmedium

1101

multi-languagehard

1052

frontendexpert

904

All Results

Task	Category	Score	Duration	Cost
Convert React app to PWA with offline support	frontend	70.2	33m 29s	$0.27
Fix broken GitHub Actions CI pipeline	debugging	83.7	14m 54s	$0.10
Remove AI slop and over-engineering from codebase	refactoring	84.0	37.0s	$0.01
Build LLM evaluation harness with structured grading	backend	50.6	1m 38s	$0.02
Implement JWT auth middleware	backend	43.9	26.1s	$0.03
Add Redis caching layer to Express API	backend	82.4	1m 35s	$0.03
Build RAG pipeline with vector search	backend	76.8	8m 36s	$0.15
Add i18n with locale routing to Next.js app	full-stack	70.0	1m 55s	$0.03
Fix data integrity bugs in denormalized e-commerce schema	debugging	84.9	47.5s	<$0.01
Fix 12 WCAG accessibility violations in checkout form	frontend	73.7	1m 12s	$0.03
Add retry logic and dead letter queue to Python task queue	backend	75.3	47.2s	<$0.01
Write Kubernetes manifests for Node.js microservice	full-stack	75.5	40.4s	$0.02
Debug race condition in worker pool	debugging	81.8	14.2s	<$0.01
Add caching layer to eliminate slow SSR page loads	full-stack	71.7	42.6s	$0.02
Fix Node.js stream backpressure causing OOM on large files	backend	67.3	57.5s	$0.03
Migrate callback-hell Express app to async/await	refactoring	80.4	8m 57s	$0.39
Build MCP server for database management	backend	53.0	51.2s	<$0.01
Fix auth bypass vulnerability	debugging	89.7	25.6s	$0.03
Implement zero-trust API authentication layer	backend	24.9	2m 36s	$0.04
Add file upload with S3 presigned URLs	backend	77.3	55.6s	$0.03
Port Python CLI to Rust	multi-language	49.0	37.7s	<$0.01
Fix React hydration mismatch	frontend	80.4	38.9s	$0.03
Zero-downtime schema migration	full-stack	72.6	34.0s	<$0.01
Add cursor-based pagination to REST API	backend	71.8	1m 14s	$0.03
Build real-time portfolio risk calculator	backend	37.5	4m 11s	$0.04
Fix memory leak in event handler	debugging	80.1	23.1s	$0.03
Add slash commands and moderation to Discord bot	backend	67.0	1m 14s	$0.01
Fix hallucination and context window bugs in RAG agent	backend	60.2	1m 11s	$0.01
Code review: identify security vulns	code-review	22.9	49.2s	$0.03
Build REST API from scratch	from-scratch	74.6	23.8s	<$0.01
Build SaaS admin dashboard from scratch	from-scratch	43.9	2m 44s	$0.03
Optimize slow Postgres queries in Flask app	backend	68.1	1m 34s	$0.01
Add streaming SSE endpoint for LLM chat	backend	77.3	47.6s	$0.03
Add GraphQL layer over REST API	multi-language	67.5	1m 14s	$0.03
Replace console.log with structured logging	refactoring	53.9	47.9s	$0.03
Implement multi-tenant row-level security in Postgres	backend	37.1	7.5s	$0.01
Implement transformer inference engine with KV cache	from-scratch	81.1	36.6s	<$0.01
Fix deadlocking transaction patterns in Flask app	backend	64.7	1m 24s	$0.01
Harden insecure Docker setup with 12 vulnerabilities	code-review	87.5	31.7s	$0.01
Find and patch all OWASP Top 10 vulnerabilities	debugging	68.0	1m 24s	$0.02
Fix broken responsive layout	frontend	69.2	14.4s	$0.02
Build CLI tool with subcommands and config	from-scratch	59.5	5m 35s	$0.05
Build materialized view refresh pipeline for analytics	backend	78.7	5m 59s	$0.26
Implement background job scheduler with persistence	backend	41.6	4m 47s	$0.03
Fix flaky test suite	debugging	85.0	36.9s	<$0.01
Build codebase indexer for LLM context windows	from-scratch	30.8	1m 45s	$0.02
Optimize bloated React bundle under 500KB	frontend	83.0	1m 57s	$0.03
Add rate limiting middleware	backend	72.7	54.9s	<$0.01
Dockerize Node.js monorepo	full-stack	69.7	41.1s	$0.02
Add Google OAuth2 login to Express app	full-stack	79.0	2m 40s	$0.04
Fix N+1 query in dashboard	backend	55.8	52.0s	<$0.01
Split 1100-line god file into proper modules	refactoring	31.8	1m 50s	$0.03
Find and fix 4 hidden backdoors in Flask app	debugging	91.5	1m 3s	<$0.01
Add virtual scrolling to table rendering 5000 rows	frontend	49.5	1m 4s	$0.03
Write tests for untested legacy Flask service	code-review	30.9	2m 16s	$0.02
Write complex SQL report with window functions	backend	60.0	2m 13s	$0.02
Implement Stripe webhook handler	backend	84.2	2m 8s	$0.04
Debug and fix 6 broken database triggers and constraints	debugging	84.5	38.4s	<$0.01
Build production website with auth and members area	frontend	57.3	11m 15s	$0.07
Write integration tests for payment flow	code-review	87.3	1m 47s	$0.03
Refactor monolithic handler to CQRS	refactoring	80.0	1m 35s	$0.03
Add WebSocket real-time updates	full-stack	80.8	4m 8s	$0.07
Build distributed node cluster with gossip protocol	from-scratch	39.8	4m 26s	$0.03
Fix race conditions in order matching engine	backend	71.5	1m 30s	$0.01
Build terminal UI dashboard	from-scratch	57.0	2m 57s	$0.02