Minimax M2.5

OpenRouter

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

1453peak 1471

Avg Score

63.4

Avg Cost

$0.14

Score/$

463.1

Runs

123

Win/Loss/Draw

Scoring Dimensions

Score Distribution

Category ELOs

multi-languagehard

2110

from-scratchexpert

2072

frontendexpert

1878

from-scratcheasy

1671

frontendhard

1641

frontendeasy

1631

refactoringexpert

1621

full-stackmedium

1602

from-scratchmedium

1593

full-stack

1555

debugginghard

1553

full-stackhard

1548

frontend

1533

frontendmedium

1513

debuggingmedium

1506

from-scratch

1483

debugging

1474

backendhard

1452

refactoring

1448

debuggingexpert

1444

backendmedium

1432

backend

1414

refactoringmedium

1411

code-review

1379

code-reviewmedium

1377

multi-language

1372

code-reviewhard

1367

backendexpert

1329

from-scratchhard

1325

backendeasy

1278

multi-languageexpert

518

All Results

Task	Category	Score	Duration	Cost
Split 1100-line god file into proper modules	refactoring	71.5	1m 57s	$0.06
Build SaaS admin dashboard from scratch	from-scratch	36.5	3m 27s	$0.06
Build codebase indexer for LLM context windows	from-scratch	46.9	1m 56s	$0.04
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	74.5	2m 1s	$0.04
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
Build real-time portfolio risk calculator	backend	17.6	3m 50s	$0.07
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
Implement zero-trust API authentication layer	backend	38.5	2m 41s	$0.09
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	26.4	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	23.9	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
Port Python CLI to Rust	multi-language	20.1	17m 24s	$0.13
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	29.9	1m 30s	$0.01
Code review: identify security vulns	code-review	11.7	1m 51s	$0.03
Build materialized view refresh pipeline for analytics	backend	72.6	5m 34s	$1.78
Fix broken responsive layout	frontend	59.3	6m 37s	$0.31
Harden insecure Docker setup with 12 vulnerabilities	code-review	79.0	2m 37s	$0.09
Add caching layer to eliminate slow SSR page loads	full-stack	81.9	6m 1s	$0.45
Replace console.log with structured logging	refactoring	40.0	17m 50s	$0.97
Implement multi-tenant row-level security in Postgres	backend	70.8	3m 57s	$0.73
Implement JWT auth middleware	backend	70.3	2m 35s	$0.73
Add i18n with locale routing to Next.js app	full-stack	69.0	4m 42s	$0.72
Find and patch all OWASP Top 10 vulnerabilities	debugging	74.0	5m 29s	$0.67
Build codebase indexer for LLM context windows	from-scratch	33.0	6m 46s	$0.88
Add file upload with S3 presigned URLs	backend	66.0	22m 14s	$0.75
Split 1100-line god file into proper modules	refactoring	71.8	6m 27s	$1.06
Write Kubernetes manifests for Node.js microservice	full-stack	86.1	2m 2s	$0.15
Dockerize Node.js monorepo	full-stack	77.3	2m 13s	$0.10
Remove AI slop and over-engineering from codebase	refactoring	78.0	4m 59s	$0.78
Optimize bloated React bundle under 500KB	frontend	75.3	7m 59s	$0.82
Convert React app to PWA with offline support	frontend	64.9	4m 19s	$0.52
Implement zero-trust API authentication layer	backend	67.7	7m 24s	$0.85
Build CLI tool with subcommands and config	from-scratch	36.5	8m 25s	$0.02
Build production website with auth and members area	frontend	67.2	14m 25s	$0.05
Build MCP server for database management	backend	50.1	28.8s	<$0.01
Implement transformer inference engine with KV cache	from-scratch	87.7	34.9s	<$0.01
Build SaaS admin dashboard from scratch	from-scratch	66.3	3m 3s	$0.03
Implement background job scheduler with persistence	backend	62.6	1m 19s	$0.01
Build real-time portfolio risk calculator	backend	46.4	13m 36s	$0.12
Fix hallucination and context window bugs in RAG agent	backend	69.8	1m 35s	$0.02
Build LLM evaluation harness with structured grading	backend	48.5	1m 42s	$0.02
Fix race conditions in order matching engine	backend	70.0	59.6s	$0.01
Fix data integrity bugs in denormalized e-commerce schema	debugging	62.9	44.3s	<$0.01
Write complex SQL report with window functions	backend	48.8	2m 41s	$0.01
Fix deadlocking transaction patterns in Flask app	backend	58.8	1m 5s	$0.01
Debug and fix 6 broken database triggers and constraints	debugging	57.0	50.7s	<$0.01
Find and fix 4 hidden backdoors in Flask app	debugging	55.8	52.9s	<$0.01
Write tests for untested legacy Flask service	code-review	36.6	1m 59s	$0.02
Add Google OAuth2 login to Express app	full-stack	69.2	1m 53s	<$0.01
Optimize slow Postgres queries in Flask app	backend	66.8	56.0s	<$0.01
Add slash commands and moderation to Discord bot	backend	67.2	58.1s	<$0.01
Add retry logic and dead letter queue to Python task queue	backend	57.6	1m 22s	$0.01
Fix Node.js stream backpressure causing OOM on large files	backend	71.2	13.6s	<$0.01
Fix 12 WCAG accessibility violations in checkout form	frontend	80.8	1m 17s	$0.01
Add virtual scrolling to table rendering 5000 rows	frontend	65.8	38.6s	<$0.01
Build distributed node cluster with gossip protocol	from-scratch	31.9	53.0s	<$0.01
Write integration tests for payment flow	code-review	55.8	55.5s	$0.01
Add GraphQL layer over REST API	multi-language	81.3	19.9s	<$0.01
Fix auth bypass vulnerability	debugging	92.6	15.7s	<$0.01
Add rate limiting middleware	backend	69.8	20.1s	<$0.01
Zero-downtime schema migration	full-stack	69.0	14.7s	<$0.01
Implement Stripe webhook handler	backend	67.5	17.8s	<$0.01
Fix flaky test suite	debugging	80.9	16.5s	<$0.01
Add cursor-based pagination to REST API	backend	63.6	15.7s	<$0.01
Fix N+1 query in dashboard	backend	78.2	20.6s	<$0.01
Build terminal UI dashboard	from-scratch	61.5	3m 26s	$0.01
Fix memory leak in event handler	debugging	62.8	10.1s	<$0.01
Code review: identify security vulns	code-review	78.3	31.8s	<$0.01
Refactor monolithic handler to CQRS	refactoring	64.7	1m 3s	<$0.01
Debug race condition in worker pool	debugging	80.8	11.4s	<$0.01
Fix React hydration mismatch	frontend	74.8	9.8s	<$0.01
Build REST API from scratch	from-scratch	84.6	9.8s	<$0.01