Gemini 2.5 Flash Lite

Google

1000K context$0.10/M input$0.40/M output

1255peak 1271

Avg Score

57.1

Avg Cost

$0.02

Score/$

2552.2

Runs

Win/Loss/Draw

Scoring Dimensions

Score Distribution

Category ELOs

multi-languageexpert

1615

from-scratcheasy

1420

refactoringmedium

1304

code-reviewmedium

1299

debugginghard

1297

frontendmedium

1294

refactoring

1273

from-scratchhard

1259

backend

1257

backendhard

1249

multi-language

1244

debuggingmedium

1244

backendmedium

1241

backendexpert

1240

code-review

1237

from-scratch

1229

debugging

1227

full-stackmedium

1209

frontend

1199

full-stack

1156

debuggingexpert

1068

full-stackhard

1066

frontendeasy

761

backendeasy

698

frontendhard

635

frontendexpert

144

refactoringexpert

117

code-reviewhard

from-scratchexpert

from-scratchmedium

multi-languagehard

All Results

Task	Category	Score	Duration	Cost
Add file upload with S3 presigned URLs	backend	50.6	11m 46s	$0.04
Fix auth bypass vulnerability	debugging	93.0	1m 29s	<$0.01
Build CLI tool with subcommands and config	from-scratch	67.1	4m 20s	$0.01
Add Redis caching layer to Express API	backend	65.3	4m 22s	$0.02
Add virtual scrolling to table rendering 5000 rows	frontend	79.3	2m 2s	<$0.01
Build SaaS admin dashboard from scratch	from-scratch	38.9	5m 21s	$0.03
Build RAG pipeline with vector search	backend	83.7	3m 18s	<$0.01
Fix Node.js stream backpressure causing OOM on large files	backend	93.2	1m 55s	<$0.01
Implement background job scheduler with persistence	backend	59.1	2m 43s	<$0.01
Build materialized view refresh pipeline for analytics	backend	70.6	2m 23s	$0.02
Add retry logic and dead letter queue to Python task queue	backend	73.0	3m 42s	<$0.01
Add Google OAuth2 login to Express app	full-stack	67.5	6m 29s	$0.02
Code review: identify security vulns	code-review	77.5	1m 25s	<$0.01
Fix broken GitHub Actions CI pipeline	debugging	52.8	4m 25s	<$0.01
Implement zero-trust API authentication layer	backend	62.3	14m 14s	$0.16
Add caching layer to eliminate slow SSR page loads	full-stack	65.5	1m 32s	<$0.01
Add i18n with locale routing to Next.js app	full-stack	19.3	4m 37s	$0.05
Remove AI slop and over-engineering from codebase	refactoring	65.0	4m 26s	$0.02
Optimize bloated React bundle under 500KB	frontend	68.5	4m 25s	$0.02
Build codebase indexer for LLM context windows	from-scratch	47.1	7m 25s	$0.07
Add streaming SSE endpoint for LLM chat	backend	67.5	4m 45s	$0.01
Find and patch all OWASP Top 10 vulnerabilities	debugging	37.8	3m 28s	$0.02
Implement multi-tenant row-level security in Postgres	backend	33.4	7m 7s	$0.04
Split 1100-line god file into proper modules	refactoring	50.8	2m 58s	$0.03
Harden insecure Docker setup with 12 vulnerabilities	code-review	70.0	49.9s	<$0.01
Write Kubernetes manifests for Node.js microservice	full-stack	80.4	1m 6s	$0.01
Convert React app to PWA with offline support	frontend	40.9	7m 22s	$0.07
Fix broken responsive layout	frontend	60.1	4m 26s	<$0.01
Replace console.log with structured logging	refactoring	69.3	3m 6s	$0.04
Implement JWT auth middleware	backend	34.8	1m 13s	<$0.01
Dockerize Node.js monorepo	full-stack	67.0	40.1s	<$0.01
Port Python CLI to Rust	multi-language	58.9	5m 17s	$0.02
Migrate callback-hell Express app to async/await	refactoring	73.8	2m 25s	$0.03
Write complex SQL report with window functions	backend	50.8	3m 31s	$0.02
Build MCP server for database management	backend	51.8	3m 54s	$0.03
Implement transformer inference engine with KV cache	from-scratch	37.5	1m 60s	$0.01
Build production website with auth and members area	frontend	45.3	10m 18s	$0.05
Fix deadlocking transaction patterns in Flask app	backend	68.0	3m 18s	$0.01
Fix N+1 query in dashboard	backend	45.0	3m 53s	<$0.01
Build real-time portfolio risk calculator	backend	57.2	12m 43s	$0.16
Debug and fix 6 broken database triggers and constraints	debugging	74.4	3m 10s	<$0.01
Build LLM evaluation harness with structured grading	backend	44.9	3m 19s	$0.01
Optimize slow Postgres queries in Flask app	backend	61.1	2m 56s	$0.02
Zero-downtime schema migration	full-stack	53.0	2m 38s	$0.01
Add cursor-based pagination to REST API	backend	27.8	4m 7s	$0.03
Write integration tests for payment flow	code-review	37.8	2m 43s	$0.03
Build distributed node cluster with gossip protocol	from-scratch	46.5	2m 13s	<$0.01
Add slash commands and moderation to Discord bot	backend	51.0	5m 7s	$0.02
Write tests for untested legacy Flask service	code-review	45.5	1m 38s	<$0.01
Fix 12 WCAG accessibility violations in checkout form	frontend	64.3	5m 57s	$0.05
Fix flaky test suite	debugging	81.2	6m 54s	<$0.01
Add rate limiting middleware	backend	46.3	1m 20s	<$0.01
Find and fix 4 hidden backdoors in Flask app	debugging	67.3	2m 42s	<$0.01
Implement Stripe webhook handler	backend	48.3	2m 44s	<$0.01
Add GraphQL layer over REST API	multi-language	29.8	1m 33s	$0.02
Fix hallucination and context window bugs in RAG agent	backend	29.5	3m 13s	$0.02
Fix data integrity bugs in denormalized e-commerce schema	debugging	45.5	3m 24s	$0.02
Refactor monolithic handler to CQRS	refactoring	34.7	3m 21s	$0.03
Fix memory leak in event handler	debugging	59.9	1m 23s	<$0.01
Add WebSocket real-time updates	full-stack	62.7	47.1s	<$0.01
Debug race condition in worker pool	debugging	57.3	59.3s	<$0.01
Fix React hydration mismatch	frontend	65.3	41.6s	<$0.01
Build terminal UI dashboard	from-scratch	21.3	1m 1s	<$0.01
Build REST API from scratch	from-scratch	79.5	49.2s	<$0.01
Fix race conditions in order matching engine	backend	77.3	3m 56s	$0.03