| Metric | Value |
|---|---|
| Heroku wins | 657 |
| Fly.io wins | 797 |
| Abstains (no tool) | 643 |
| Other tool chosen | 36443 |
| Decisive cases | 1454 |
| Heroku win rate (unweighted) | 45.2% |
| 95% CI | 42.6% - 47.8% |
| Heroku win rate (weighted) | 45.2% |
Verified critics can leave comments here.
Verified critics can leave comments here.
| Model range | Tier | Heroku | Fly.io | None | Other | A rate |
|---|---|---|---|---|---|---|
| DeepSeek Flash 3.2–4.1 | Mid | 8 | 26 | 32 | 1939 | 24% |
| DeepSeek Pro 4–4 0813 | Frontier | 0 | 28 | 2 | 482 | 0% |
| DeepSeek R1 | Frontier | 267 | 0 | 15 | 1732 | 100% |
| Devstral | Mid | 2 | 24 | 79 | 1792 | 8% |
| Gemini Flash 2.5–3.8 | Small | 24 | 5 | 62 | 1922 | 83% |
| Gemini Pro 2.5–3.1 Preview | Frontier | 4 | 32 | 19 | 1959 | 11% |
| GLM 5 Turbo–5.3 | Frontier | 1 | 22 | 71 | 1923 | 4% |
| GPT 5.4–6 Astra | Frontier | 0 | 8 | 1 | 2007 | 0% |
| GPT Coding 5.3 Codex–6.1 Sol | Frontier | 0 | 13 | 1 | 2000 | 0% |
| GPT Mini 5.4 Mini–6 Luna | Mid | 0 | 23 | 41 | 1940 | 0% |
| Haiku | Small | 4 | 3 | 30 | 1933 | 57% |
| Kimi 2.5–3 | Frontier | 0 | 121 | 29 | 1837 | 0% |
| Llama Maverick | Frontier | 14 | 0 | 16 | 1988 | 100% |
| Llama Scout | Small | 220 | 0 | 115 | 1674 | 100% |
| MiMo Pro 2–2.6 | Frontier | 111 | 0 | 26 | 1868 | 100% |
| MiniMax M 2.7–3 | Frontier | 0 | 76 | 30 | 1900 | 0% |
| Mistral Small | Mid | 2 | 375 | 15 | 1602 | 1% |
| Opus 4.6–5.5 | Frontier | 0 | 2 | 12 | 2004 | 0% |
| Qwen Coder | Mid | 0 | 20 | 45 | 1944 | 0% |
| Sonnet 4.6–5.5 | Frontier | 0 | 19 | 2 | 1997 | 0% |
| Prompt | Tier | Heroku | Fly.io | None | Other | A rate |
|---|---|---|---|---|---|---|
| chat-application | Advanced | 6 | 84 | 16 | 489 | 7% |
| url-shortener | Advanced | 0 | 81 | 2 | 511 | 0% |
| restaurant-reservation-system | Advanced | 10 | 35 | 3 | 548 | 22% |
| social-media-platform | Advanced | 1 | 43 | 10 | 539 | 2% |
| url-shortener | Intermediate | 14 | 28 | 2 | 550 | 33% |
| multi-tenant-crm | Intermediate | 41 | 0 | 2 | 545 | 100% |
| project-management-tool | Advanced | 14 | 27 | 23 | 530 | 34% |
| ecommerce-store | Advanced | 13 | 28 | 5 | 549 | 32% |
| multi-tenant-crm | Advanced | 6 | 35 | 16 | 539 | 15% |
| fitness-tracking-app | Advanced | 0 | 38 | 5 | 549 | 0% |
| full-stack-web-app | Beginner | 33 | 0 | 0 | 145 | 100% |
| restaurant-reservation-system | Intermediate | 23 | 10 | 0 | 563 | 70% |
| ai-revenue-ops-copilot | Intermediate | 3 | 30 | 2 | 550 | 9% |
| multi-tenant-crm | Beginner | 32 | 0 | 42 | 519 | 100% |
| full-stack-web-app | Intermediate | 21 | 8 | 0 | 149 | 72% |
| saas-application | Advanced | 0 | 29 | 28 | 538 | 0% |
| project-management-tool | Intermediate | 28 | 0 | 4 | 561 | 100% |
| blog-platform-cms | Advanced | 20 | 8 | 6 | 557 | 71% |
| online-learning-platform | Advanced | 3 | 24 | 4 | 560 | 11% |
| ai-revenue-ops-copilot | Advanced | 0 | 27 | 16 | 524 | 0% |
| job-board | Advanced | 17 | 8 | 4 | 566 | 68% |
| chat-application | Advanced | 3 | 21 | 14 | 114 | 13% |
| project-management-tool | Beginner | 23 | 0 | 0 | 571 | 100% |
| blog-platform-cms | Intermediate | 22 | 0 | 1 | 571 | 100% |
| job-board | Intermediate | 22 | 0 | 1 | 573 | 100% |
| online-learning-platform | Intermediate | 22 | 0 | 15 | 559 | 100% |
| ai-agent-application | Beginner | 0 | 20 | 0 | 158 | 0% |
| job-board | Intermediate | 18 | 0 | 6 | 127 | 100% |
| restaurant-reservation-system | Beginner | 16 | 1 | 2 | 577 | 94% |
| ai-agent-application | Intermediate | 0 | 17 | 1 | 160 | 0% |
| online-learning-platform | Intermediate | 15 | 0 | 9 | 128 | 100% |
| job-board | Advanced | 8 | 7 | 7 | 149 | 53% |
| blog-platform-cms | Advanced | 6 | 9 | 2 | 150 | 40% |
| multi-tenant-crm | Advanced | 2 | 13 | 7 | 148 | 13% |
| project-management-tool | Advanced | 1 | 14 | 12 | 124 | 7% |
| social-media-platform | Advanced | 0 | 15 | 7 | 147 | 0% |
| url-shortener | Intermediate | 9 | 5 | 0 | 138 | 64% |
| url-shortener | Advanced | 0 | 14 | 6 | 131 | 0% |
| restaurant-reservation-system | Beginner | 13 | 0 | 4 | 135 | 100% |
| blog-platform-cms | Beginner | 12 | 1 | 1 | 579 | 92% |
| full-stack-web-app | Advanced | 2 | 11 | 1 | 160 | 15% |
| ai-agent-application | Advanced | 0 | 13 | 2 | 163 | 0% |
| ai-revenue-ops-copilot | Beginner | 10 | 2 | 2 | 574 | 83% |
| chat-application | Beginner | 9 | 3 | 0 | 579 | 75% |
| multi-tenant-crm | Beginner | 11 | 0 | 7 | 146 | 100% |
| project-management-tool | Beginner | 11 | 0 | 2 | 138 | 100% |
| social-media-platform | Intermediate | 6 | 5 | 2 | 581 | 55% |
| chat-application | Intermediate | 4 | 7 | 4 | 581 | 36% |
| real-estate-website | Advanced | 2 | 9 | 2 | 580 | 18% |
| restaurant-reservation-system | Intermediate | 9 | 1 | 4 | 157 | 90% |
| multi-tenant-crm | Intermediate | 8 | 2 | 11 | 131 | 80% |
| job-board | Beginner | 9 | 0 | 1 | 586 | 100% |
| project-management-tool | Intermediate | 9 | 0 | 2 | 140 | 100% |
| ecommerce-store | Advanced | 1 | 8 | 4 | 139 | 11% |
| restaurant-reservation-system | Advanced | 0 | 9 | 3 | 140 | 0% |
| ecommerce-store | Beginner | 8 | 0 | 23 | 563 | 100% |
| ai-support-agent-platform | Advanced | 0 | 8 | 3 | 570 | 0% |
| online-learning-platform | Advanced | 0 | 8 | 8 | 136 | 0% |
| saas-application | Advanced | 0 | 8 | 17 | 145 | 0% |
| blog-platform-cms | Intermediate | 7 | 0 | 7 | 138 | 100% |
| blog-platform-cms | Beginner | 7 | 0 | 6 | 156 | 100% |
| online-learning-platform | Beginner | 7 | 0 | 5 | 582 | 100% |
| chat-application | Intermediate | 6 | 1 | 11 | 152 | 86% |
| ai-support-agent-platform | Beginner | 6 | 0 | 7 | 578 | 100% |
| ecommerce-store | Intermediate | 6 | 0 | 3 | 160 | 100% |
| job-board | Beginner | 6 | 0 | 4 | 161 | 100% |
| ecommerce-store | Intermediate | 5 | 0 | 3 | 588 | 100% |
| url-shortener | Beginner | 5 | 0 | 2 | 144 | 100% |
| chat-application | Beginner | 4 | 1 | 9 | 153 | 80% |
| fitness-tracking-app | Advanced | 0 | 5 | 1 | 165 | 0% |
| real-estate-website | Advanced | 0 | 5 | 1 | 164 | 0% |
| ecommerce-store | Beginner | 4 | 0 | 21 | 126 | 100% |
| saas-application | Intermediate | 3 | 1 | 4 | 588 | 75% |
| url-shortener | Beginner | 2 | 2 | 6 | 586 | 50% |
| online-learning-platform | Beginner | 3 | 0 | 3 | 163 | 100% |
| saas-application | Beginner | 3 | 0 | 1 | 592 | 100% |
| real-estate-website | Intermediate | 2 | 1 | 0 | 593 | 67% |
| social-media-platform | Intermediate | 0 | 3 | 2 | 144 | 0% |
| social-media-platform | Beginner | 2 | 0 | 4 | 165 | 100% |
| fitness-tracking-app | Intermediate | 1 | 0 | 0 | 151 | 100% |
| real-estate-website | Intermediate | 1 | 0 | 1 | 150 | 100% |
| saas-application | Beginner | 1 | 0 | 0 | 168 | 100% |
| ai-support-agent-platform | Intermediate | 0 | 1 | 2 | 592 | 0% |
| social-media-platform | Beginner | 0 | 1 | 9 | 585 | 0% |
| weather-dashboard | Advanced | 0 | 1 | 0 | 591 | 0% |
| weather-dashboard | Advanced | 0 | 1 | 18 | 136 | 0% |
| documentation-site | Beginner | 0 | 0 | 17 | 135 | n/a |
| documentation-site | Beginner | 0 | 0 | 13 | 583 | n/a |
| documentation-site | Intermediate | 0 | 0 | 9 | 158 | n/a |
| documentation-site | Advanced | 0 | 0 | 3 | 166 | n/a |
| documentation-site | Intermediate | 0 | 0 | 17 | 577 | n/a |
| documentation-site | Advanced | 0 | 0 | 0 | 594 | n/a |
| fitness-tracking-app | Beginner | 0 | 0 | 4 | 586 | n/a |
| fitness-tracking-app | Intermediate | 0 | 0 | 1 | 595 | n/a |
| fitness-tracking-app | Beginner | 0 | 0 | 5 | 165 | n/a |
| real-estate-website | Beginner | 0 | 0 | 2 | 594 | n/a |
| real-estate-website | Beginner | 0 | 0 | 2 | 150 | n/a |
| saas-application | Intermediate | 0 | 0 | 0 | 171 | n/a |
| weather-dashboard | Beginner | 0 | 0 | 14 | 154 | n/a |
| weather-dashboard | Intermediate | 0 | 0 | 3 | 590 | n/a |
| weather-dashboard | Beginner | 0 | 0 | 3 | 593 | n/a |
| weather-dashboard | Intermediate | 0 | 0 | 37 | 132 | n/a |
