Minimax M2.1

OpenRouter

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

1475peak 1477

Avg Score

64.8

Avg Cost

$0.12

Score/$

529.9

Runs

125

Win/Loss/Draw

Scoring Dimensions

Score Distribution

Category ELOs

multi-languageexpert

2238

code-reviewhard

2169

from-scratchmedium

1807

refactoringexpert

1782

from-scratchexpert

1758

debuggingmedium

1674

from-scratcheasy

1671

full-stackhard

1607

refactoring

1603

backendhard

1590

refactoringmedium

1589

debuggingexpert

1584

backendeasy

1562

frontendeasy

1555

debugging

1546

code-review

1517

debugginghard

1515

full-stack

1501

backend

1467

multi-language

1436

backendexpert

1436

code-reviewmedium

1435

frontendmedium

1432

frontend

1429

full-stackmedium

1418

from-scratch

1394

backendmedium

1373

frontendexpert

1361

from-scratchhard

1301

frontendhard

1138

multi-languagehard

1099

All Results

Task	Category	Score	Duration	Cost
Convert React app to PWA with offline support	frontend	70.2	33m 29s	$0.28
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	$0.04
Build RAG pipeline with vector search	backend	47.8	2m 9s	$0.03
Add i18n with locale routing to Next.js app	full-stack	70.0	1m 55s	$0.05
Fix data integrity bugs in denormalized e-commerce schema	debugging	84.9	47.5s	$0.02
Fix 12 WCAG accessibility violations in checkout form	frontend	73.7	1m 12s	$0.04
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	$0.03
Fix Node.js stream backpressure causing OOM on large files	backend	67.3	57.5s	$0.04
Migrate callback-hell Express app to async/await	refactoring	37.3	1m 31s	$0.05
Build MCP server for database management	backend	53.0	51.2s	$0.02
Fix auth bypass vulnerability	debugging	89.7	25.6s	$0.03
Implement zero-trust API authentication layer	backend	24.9	2m 36s	$0.07
Add file upload with S3 presigned URLs	backend	77.3	55.6s	$0.04
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	$0.04
Build real-time portfolio risk calculator	backend	37.5	4m 11s	$0.07
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	$0.02
Fix hallucination and context window bugs in RAG agent	backend	60.2	1m 11s	$0.02
Code review: identify security vulns	code-review	22.9	49.2s	$0.04
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	$0.05
Optimize slow Postgres queries in Flask app	backend	68.1	1m 34s	$0.02
Add streaming SSE endpoint for LLM chat	backend	77.3	47.6s	$0.04
Add GraphQL layer over REST API	multi-language	67.5	1m 14s	$0.04
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	$0.02
Harden insecure Docker setup with 12 vulnerabilities	code-review	87.5	31.7s	$0.02
Find and patch all OWASP Top 10 vulnerabilities	debugging	68.0	1m 24s	$0.03
Fix broken responsive layout	frontend	69.2	14.4s	$0.02
Build CLI tool with subcommands and config	from-scratch	38.5	5m 35s	$0.10
Build materialized view refresh pipeline for analytics	backend	67.3	2m 20s	$0.04
Implement background job scheduler with persistence	backend	41.6	4m 47s	$0.04
Fix flaky test suite	debugging	85.0	36.9s	<$0.01
Build codebase indexer for LLM context windows	from-scratch	30.8	1m 45s	$0.03
Optimize bloated React bundle under 500KB	frontend	83.0	1m 57s	$0.04
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	$0.06
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	$0.04
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	$0.03
Write complex SQL report with window functions	backend	60.0	2m 13s	$0.03
Implement Stripe webhook handler	backend	84.2	2m 8s	$0.05
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	$0.14
Write integration tests for payment flow	code-review	87.3	1m 47s	$0.05
Refactor monolithic handler to CQRS	refactoring	80.0	1m 35s	$0.04
Add WebSocket real-time updates	full-stack	67.7	36.7s	$0.03
Build distributed node cluster with gossip protocol	from-scratch	31.8	4m 26s	$0.06
Fix race conditions in order matching engine	backend	71.5	1m 30s	$0.02
Build terminal UI dashboard	from-scratch	56.6	2m 57s	$0.04
Migrate callback-hell Express app to async/await	refactoring	80.4	8m 57s	$1.34
Build materialized view refresh pipeline for analytics	backend	78.7	5m 59s	$0.86
Build RAG pipeline with vector search	backend	76.8	8m 36s	$0.49
Add WebSocket real-time updates	full-stack	80.8	4m 8s	$0.24
Optimize bloated React bundle under 500KB	frontend	76.8	8m 11s	$0.94
Dockerize Node.js monorepo	full-stack	72.9	2m 23s	$0.07
Find and patch all OWASP Top 10 vulnerabilities	debugging	72.8	6m 23s	$0.95
Implement zero-trust API authentication layer	backend	66.4	17m 34s	$1.24
Write Kubernetes manifests for Node.js microservice	full-stack	82.8	13m 47s	$0.07
Replace console.log with structured logging	refactoring	55.5	19m 43s	$0.38
Implement multi-tenant row-level security in Postgres	backend	73.5	5m 33s	$0.95
Fix broken responsive layout	frontend	75.3	3m 2s	$0.16
Harden insecure Docker setup with 12 vulnerabilities	code-review	90.0	1m 37s	$0.04
Convert React app to PWA with offline support	frontend	58.3	26m 2s	$0.34
Build codebase indexer for LLM context windows	from-scratch	32.0	6m 9s	$1.26
Remove AI slop and over-engineering from codebase	refactoring	80.5	3m 50s	$0.38
Split 1100-line god file into proper modules	refactoring	72.7	6m 4s	$1.02
Add i18n with locale routing to Next.js app	full-stack	66.8	7m 55s	$0.71
Add caching layer to eliminate slow SSR page loads	full-stack	72.7	6m 17s	$0.52
Implement JWT auth middleware	backend	76.5	3m 13s	$0.23
Implement background job scheduler with persistence	backend	56.1	17m 18s	$0.17
Implement transformer inference engine with KV cache	from-scratch	56.4	8m 50s	$0.09
Build MCP server for database management	backend	78.7	20.7s	<$0.01
Build production website with auth and members area	frontend	54.9	3m 8s	$0.05
Build SaaS admin dashboard from scratch	from-scratch	65.5	1m 36s	$0.03
Build CLI tool with subcommands and config	from-scratch	42.5	1m 12s	$0.02
Fix hallucination and context window bugs in RAG agent	backend	70.9	1m 60s	$0.02
Add rate limiting middleware	backend	39.8	52.8s	<$0.01
Fix flaky test suite	debugging	81.2	41.4s	<$0.01
Add cursor-based pagination to REST API	backend	67.6	12.7s	<$0.01
Fix 12 WCAG accessibility violations in checkout form	frontend	68.5	3m 40s	$0.01
Optimize slow Postgres queries in Flask app	backend	65.5	1m 51s	<$0.01
Add slash commands and moderation to Discord bot	backend	59.3	3m 5s	<$0.01
Write complex SQL report with window functions	backend	75.7	1m 18s	$0.01
Build distributed node cluster with gossip protocol	from-scratch	32.7	2m 17s	$0.01
Build real-time portfolio risk calculator	backend	47.3	2m 13s	$0.01
Write integration tests for payment flow	code-review	49.5	1m 20s	$0.01
Find and fix 4 hidden backdoors in Flask app	debugging	75.6	27.3s	<$0.01
Build LLM evaluation harness with structured grading	backend	65.0	3m 49s	$0.03
Fix data integrity bugs in denormalized e-commerce schema	debugging	57.3	1m 49s	$0.02
Add Redis caching layer to Express API	backend	69.5	40.4s	<$0.01
Fix auth bypass vulnerability	debugging	79.9	20.0s	<$0.01
Add GraphQL layer over REST API	multi-language	67.2	33.8s	<$0.01
Fix race conditions in order matching engine	backend	67.0	1m 44s	<$0.01
Fix Node.js stream backpressure causing OOM on large files	backend	73.9	1m 9s	<$0.01
Write tests for untested legacy Flask service	code-review	46.7	4m 17s	$0.02
Add retry logic and dead letter queue to Python task queue	backend	56.6	35.8s	<$0.01
Add virtual scrolling to table rendering 5000 rows	frontend	48.0	22.4s	<$0.01
Fix deadlocking transaction patterns in Flask app	backend	73.4	1m 1s	$0.01
Debug and fix 6 broken database triggers and constraints	debugging	70.9	52.9s	$0.01
Zero-downtime schema migration	full-stack	55.5	24.7s	<$0.01
Implement Stripe webhook handler	backend	70.2	10.5s	<$0.01
Fix N+1 query in dashboard	backend	56.0	8.5s	<$0.01
Code review: identify security vulns	code-review	70.0	13.6s	<$0.01
Fix memory leak in event handler	debugging	64.5	6.3s	<$0.01
Refactor monolithic handler to CQRS	refactoring	34.4	49.9s	$0.01
Debug race condition in worker pool	debugging	66.3	8.2s	<$0.01
Fix React hydration mismatch	frontend	68.0	5.1s	<$0.01
Build terminal UI dashboard	from-scratch	35.5	20.7s	<$0.01
Build REST API from scratch	from-scratch	84.6	6.1s	<$0.01