| Metric | Value |
|---|---|
| Heroku wins | 431 |
| Fly.io wins | 583 |
| Abstains (no tool) | 305 |
| Other tool chosen | 26753 |
| Decisive cases | 1014 |
| Heroku win rate (unweighted) | 42.5% |
| 95% CI | 39.5% - 45.6% |
| Heroku win rate (weighted) | 42.5% |
Verified critics can leave comments here.
Verified critics can leave comments here.
| Model | Tier | Heroku | Fly.io | None | Other | A rate |
|---|---|---|---|---|---|---|
| Mistral Small 4 | Mid | 1 | 257 | 10 | 1182 | 0% |
| DeepSeek R1 0528 | Frontier | 177 | 0 | 9 | 1281 | 100% |
| Llama 4 Scout | Small | 150 | 0 | 44 | 1271 | 100% |
| Kimi K2.5 | Frontier | 0 | 90 | 20 | 937 | 0% |
| MiMo V2 Pro | Frontier | 58 | 0 | 19 | 993 | 100% |
| MiniMax M2.7 | Frontier | 0 | 42 | 8 | 1013 | 0% |
| Devstral 2 2512 | Mid | 0 | 23 | 24 | 1306 | 0% |
| DeepSeek V4 Pro | Frontier | 0 | 22 | 1 | 375 | 0% |
| MiMo V2.5 Pro | Frontier | 20 | 0 | 3 | 375 | 100% |
| GPT 5.4 Mini | Mid | 0 | 20 | 20 | 1420 | 0% |
| MiniMax M3 | Frontier | 0 | 20 | 1 | 377 | 0% |
| DeepSeek V4 Flash | Mid | 4 | 15 | 6 | 369 | 21% |
| GLM 5 Turbo | Frontier | 0 | 17 | 47 | 1007 | 0% |
| Gemini 2.5 Pro | Frontier | 3 | 12 | 17 | 1436 | 20% |
| Claude Sonnet 4.6 | Frontier | 0 | 15 | 1 | 1454 | 0% |
| Qwen3 Coder Next | Mid | 0 | 14 | 21 | 1430 | 0% |
| Llama 4 Maverick | Frontier | 11 | 0 | 1 | 1458 | 100% |
| Gemini 3.5 Flash | Small | 4 | 5 | 0 | 389 | 44% |
| GPT 5.3 Codex | Frontier | 0 | 9 | 0 | 1458 | 0% |
| DeepSeek V3.2 | Mid | 1 | 5 | 20 | 1040 | 17% |
| Kimi K2.7 Code | Frontier | 0 | 5 | 1 | 391 | 0% |
| GLM 5.2 | Frontier | 0 | 4 | 0 | 394 | 0% |
| GPT 5.4 | Frontier | 0 | 3 | 0 | 1067 | 0% |
| Gemini 2.5 Flash | Small | 2 | 0 | 31 | 1035 | 100% |
| Claude Haiku 4.5 | Small | 0 | 2 | 1 | 1429 | 0% |
| Claude Opus 4.8 | Frontier | 0 | 2 | 0 | 397 | 0% |
| GPT 5.5 | Frontier | 0 | 1 | 0 | 398 | 0% |
| Claude Opus 4.6 | Frontier | 0 | 0 | 0 | 1071 | n/a |
| Prompt | Tier | Heroku | Fly.io | None | Other | A rate |
|---|---|---|---|---|---|---|
| chat-application | Advanced | 6 | 74 | 16 | 440 | 8% |
| url-shortener | Advanced | 0 | 76 | 2 | 457 | 0% |
| social-media-platform | Advanced | 1 | 40 | 8 | 485 | 2% |
| restaurant-reservation-system | Advanced | 8 | 32 | 3 | 494 | 20% |
| multi-tenant-crm | Intermediate | 39 | 0 | 2 | 489 | 100% |
| url-shortener | Intermediate | 12 | 27 | 2 | 495 | 31% |
| project-management-tool | Advanced | 13 | 25 | 20 | 477 | 34% |
| multi-tenant-crm | Advanced | 5 | 32 | 15 | 485 | 14% |
| ecommerce-store | Advanced | 12 | 24 | 3 | 497 | 33% |
| fitness-tracking-app | Advanced | 0 | 32 | 4 | 497 | 0% |
| restaurant-reservation-system | Intermediate | 21 | 10 | 0 | 506 | 68% |
| ai-revenue-ops-copilot | Intermediate | 2 | 27 | 2 | 496 | 7% |
| full-stack-web-app | Beginner | 28 | 0 | 0 | 110 | 100% |
| multi-tenant-crm | Beginner | 28 | 0 | 41 | 465 | 100% |
| project-management-tool | Intermediate | 28 | 0 | 3 | 503 | 100% |
| blog-platform-cms | Advanced | 19 | 7 | 6 | 500 | 73% |
| saas-application | Advanced | 0 | 26 | 25 | 485 | 0% |
| ai-revenue-ops-copilot | Advanced | 0 | 25 | 14 | 468 | 0% |
| job-board | Advanced | 16 | 8 | 4 | 508 | 67% |
| online-learning-platform | Advanced | 3 | 21 | 4 | 506 | 13% |
| project-management-tool | Beginner | 22 | 0 | 0 | 513 | 100% |
| full-stack-web-app | Intermediate | 16 | 6 | 0 | 116 | 73% |
| blog-platform-cms | Intermediate | 20 | 0 | 1 | 514 | 100% |
| online-learning-platform | Intermediate | 20 | 0 | 14 | 503 | 100% |
| job-board | Intermediate | 18 | 0 | 1 | 518 | 100% |
| ai-agent-application | Beginner | 0 | 17 | 0 | 121 | 0% |
| restaurant-reservation-system | Beginner | 13 | 1 | 2 | 521 | 93% |
| ai-agent-application | Intermediate | 0 | 14 | 1 | 123 | 0% |
| chat-application | Beginner | 9 | 3 | 0 | 520 | 75% |
| blog-platform-cms | Beginner | 10 | 1 | 1 | 522 | 91% |
| social-media-platform | Intermediate | 6 | 5 | 2 | 522 | 55% |
| full-stack-web-app | Advanced | 2 | 9 | 1 | 122 | 18% |
| ai-agent-application | Advanced | 0 | 11 | 2 | 125 | 0% |
| chat-application | Intermediate | 3 | 7 | 4 | 523 | 30% |
| real-estate-website | Advanced | 2 | 8 | 2 | 522 | 20% |
| ai-revenue-ops-copilot | Beginner | 7 | 2 | 2 | 518 | 78% |
| job-board | Beginner | 8 | 0 | 1 | 528 | 100% |
| ecommerce-store | Beginner | 7 | 0 | 20 | 508 | 100% |
| online-learning-platform | Beginner | 7 | 0 | 5 | 525 | 100% |
| ai-support-agent-platform | Advanced | 0 | 7 | 2 | 517 | 0% |
| ai-support-agent-platform | Beginner | 6 | 0 | 6 | 519 | 100% |
| ecommerce-store | Intermediate | 5 | 0 | 2 | 530 | 100% |
| saas-application | Intermediate | 3 | 1 | 3 | 530 | 75% |
| real-estate-website | Intermediate | 2 | 1 | 0 | 534 | 67% |
| url-shortener | Beginner | 2 | 1 | 6 | 528 | 67% |
| saas-application | Beginner | 2 | 0 | 1 | 534 | 100% |
| ai-support-agent-platform | Intermediate | 0 | 1 | 2 | 533 | 0% |
| social-media-platform | Beginner | 0 | 1 | 9 | 526 | 0% |
| weather-dashboard | Advanced | 0 | 1 | 0 | 533 | 0% |
| documentation-site | Advanced | 0 | 0 | 0 | 535 | n/a |
| documentation-site | Intermediate | 0 | 0 | 16 | 519 | n/a |
| documentation-site | Beginner | 0 | 0 | 12 | 525 | n/a |
| fitness-tracking-app | Intermediate | 0 | 0 | 1 | 536 | n/a |
| fitness-tracking-app | Beginner | 0 | 0 | 4 | 527 | n/a |
| real-estate-website | Beginner | 0 | 0 | 2 | 535 | n/a |
| weather-dashboard | Beginner | 0 | 0 | 3 | 534 | n/a |
| weather-dashboard | Intermediate | 0 | 0 | 3 | 531 | n/a |
