Minimax M2.5

OpenRouter

205K context$0.30/M input$1.20/M output

1394peak 1422

Avg Score

64.7

Avg Cost

$0.09

Score/$

712.3

Runs

Win/Loss/Draw

Scoring Dimensions

Score Distribution

Category ELOs

from-scratchexpert

2076

multi-languagehard

1812

from-scratcheasy

1700

debugginghard

1569

frontendhard

1562

frontendexpert

1527

full-stackmedium

1513

full-stack

1467

frontend

1445

frontendmedium

1445

backendexpert

1434

debugging

1428

backendmedium

1426

full-stackhard

1425

from-scratch

1412

code-reviewhard

1408

multi-language

1397

backend

1368

code-review

1333

debuggingmedium

1329

code-reviewmedium

1308

debuggingexpert

1293

refactoring

1283

refactoringmedium

1249

backendhard

1244

from-scratchhard

1233

frontendeasy

1209

refactoringexpert

1147

from-scratchmedium

1100

backendeasy

1094

multi-languageexpert

609

All Results

Task	Category	Score	Duration	Cost
Port Python CLI to Rust	multi-language	39.6	31m 18s	$0.10
Build SaaS admin dashboard from scratch	from-scratch	53.0	5m 57s	$0.03
Implement zero-trust API authentication layer	backend	81.7	18m 11s	$0.20
Build real-time portfolio risk calculator	backend	79.0	13m 29s	$0.11
Build codebase indexer for LLM context windows	from-scratch	70.1	10m 46s	$0.09
Code review: identify security vulns	code-review	81.3	4m 9s	$0.08
Split 1100-line god file into proper modules	refactoring	71.5	1m 57s	$0.06
Find and patch all OWASP Top 10 vulnerabilities	debugging	65.8	1m 52s	$0.07
Fix broken responsive layout	frontend	71.1	18.0s	$0.03
Write complex SQL report with window functions	backend	60.5	1m 49s	$0.04
Optimize bloated React bundle under 500KB	frontend	73.2	1m 19s	$0.05
Implement background job scheduler with persistence	backend	31.9	7m 12s	$0.11
Build materialized view refresh pipeline for analytics	backend	72.6	5m 34s	$1.78
Optimize slow Postgres queries in Flask app	backend	69.7	1m 14s	$0.02
Fix 12 WCAG accessibility violations in checkout form	frontend	81.6	1m 16s	$0.05
Implement multi-tenant row-level security in Postgres	backend	44.8	10.8s	$0.02
Fix race conditions in order matching engine	backend	59.6	1m 3s	$0.02
Debug race condition in worker pool	debugging	85.1	17.1s	<$0.01
Build MCP server for database management	backend	53.5	1m 14s	$0.03
Fix Node.js stream backpressure causing OOM on large files	backend	32.8	11m 25s	$0.29
Add cursor-based pagination to REST API	backend	72.0	46.3s	$0.06
Fix auth bypass vulnerability	debugging	89.7	36.0s	$0.05
Write integration tests for payment flow	code-review	73.3	1m 35s	$0.07
Fix flaky test suite	debugging	64.5	41.9s	$0.01
Add slash commands and moderation to Discord bot	backend	75.9	43.9s	$0.01
Add WebSocket real-time updates	full-stack	73.3	15.2s	$0.03
Replace console.log with structured logging	refactoring	54.6	50.3s	$0.06
Fix hallucination and context window bugs in RAG agent	backend	45.6	49.7s	$0.02
Add GraphQL layer over REST API	multi-language	63.8	3m 59s	$0.10
Build REST API from scratch	from-scratch	74.6	28.2s	<$0.01
Add Redis caching layer to Express API	backend	79.8	1m 7s	$0.06
Remove AI slop and over-engineering from codebase	refactoring	75.1	25.2s	$0.03
Add Google OAuth2 login to Express app	full-stack	81.2	1m 7s	$0.06
Convert React app to PWA with offline support	frontend	80.2	17m 36s	$0.51
Fix data integrity bugs in denormalized e-commerce schema	debugging	74.5	54.7s	$0.02
Build terminal UI dashboard	from-scratch	31.6	1m 50s	$0.03
Fix N+1 query in dashboard	backend	45.0	39.3s	$0.01
Implement Stripe webhook handler	backend	53.3	2m 5s	$0.08
Fix broken GitHub Actions CI pipeline	debugging	75.7	29.0s	$0.06
Write tests for untested legacy Flask service	code-review	38.1	10m 11s	$0.17
Add virtual scrolling to table rendering 5000 rows	frontend	40.3	1m 0s	$0.06
Fix React hydration mismatch	frontend	78.0	55.1s	$0.06
Build CLI tool with subcommands and config	from-scratch	29.4	43m 28s	$0.16
Find and fix 4 hidden backdoors in Flask app	debugging	90.3	36.1s	$0.01
Dockerize Node.js monorepo	full-stack	71.5	47.1s	$0.04
Implement JWT auth middleware	backend	53.9	24.5s	$0.05
Implement transformer inference engine with KV cache	from-scratch	85.4	30.5s	<$0.01
Build RAG pipeline with vector search	backend	42.0	1m 16s	$0.02
Build LLM evaluation harness with structured grading	backend	43.5	1m 51s	$0.04
Add i18n with locale routing to Next.js app	full-stack	68.3	1m 44s	$0.06
Write Kubernetes manifests for Node.js microservice	full-stack	82.2	18.3s	$0.03
Fix memory leak in event handler	debugging	81.0	22.7s	$0.05
Add streaming SSE endpoint for LLM chat	backend	77.3	9m 33s	$0.21
Fix deadlocking transaction patterns in Flask app	backend	78.0	1m 29s	$0.03
Add rate limiting middleware	backend	43.0	32.5s	$0.01
Debug and fix 6 broken database triggers and constraints	debugging	72.2	3m 1s	$0.06
Harden insecure Docker setup with 12 vulnerabilities	code-review	68.0	20.6s	$0.03
Build production website with auth and members area	frontend	67.3	4m 49s	$0.08
Refactor monolithic handler to CQRS	refactoring	40.6	1m 7s	$0.06
Add file upload with S3 presigned URLs	backend	77.3	2m 22s	$0.08
Zero-downtime schema migration	full-stack	63.0	17.4s	<$0.01
Add caching layer to eliminate slow SSR page loads	full-stack	80.1	48.8s	$0.04
Add retry logic and dead letter queue to Python task queue	backend	74.8	1m 26s	<$0.01
Migrate callback-hell Express app to async/await	refactoring	62.8	4m 3s	$0.04
Build distributed node cluster with gossip protocol	from-scratch	36.6	1m 30s	$0.01