| Metric | Value |
|---|---|
| Heroku wins | 429 |
| Fly.io wins | 575 |
| Abstains (no tool) | 319 |
| Other tool chosen | 26631 |
| Decisive cases | 1004 |
| Heroku win rate (unweighted) | 42.7% |
| 95% CI | 39.7% - 45.8% |
| Heroku win rate (weighted) | 42.7% |
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 | 256 | 10 | 1177 | 0% |
| DeepSeek R1 0528 | Frontier | 176 | 0 | 9 | 1276 | 100% |
| Llama 4 Scout | Small | 150 | 0 | 45 | 1264 | 100% |
| Kimi K2.5 | Frontier | 0 | 93 | 23 | 978 | 0% |
| MiMo V2 Pro | Frontier | 59 | 0 | 20 | 1042 | 100% |
| MiniMax M2.7 | Frontier | 0 | 44 | 8 | 1062 | 0% |
| Devstral 2 2512 | Mid | 0 | 24 | 25 | 1354 | 0% |
| MiMo V2.5 Pro | Frontier | 19 | 0 | 2 | 320 | 100% |
| DeepSeek V4 Pro | Frontier | 0 | 19 | 1 | 321 | 0% |
| GPT 5.4 Mini | Mid | 0 | 18 | 20 | 1416 | 0% |
| Claude Sonnet 4.6 | Frontier | 0 | 17 | 1 | 1446 | 0% |
| GLM 5 Turbo | Frontier | 0 | 17 | 50 | 1055 | 0% |
| MiniMax M3 | Frontier | 0 | 17 | 1 | 323 | 0% |
| DeepSeek V4 Flash | Mid | 4 | 12 | 6 | 315 | 25% |
| Gemini 2.5 Pro | Frontier | 3 | 13 | 18 | 1428 | 19% |
| Qwen3 Coder Next | Mid | 0 | 12 | 23 | 1424 | 0% |
| Llama 4 Maverick | Frontier | 10 | 0 | 1 | 1453 | 100% |
| Gemini 3.5 Flash | Small | 4 | 5 | 0 | 332 | 44% |
| GPT 5.3 Codex | Frontier | 0 | 8 | 0 | 1453 | 0% |
| DeepSeek V3.2 | Mid | 1 | 5 | 21 | 1090 | 17% |
| Kimi K2.7 Code | Frontier | 0 | 5 | 1 | 334 | 0% |
| GLM 5.2 | Frontier | 0 | 3 | 0 | 338 | 0% |
| GPT 5.4 | Frontier | 0 | 3 | 0 | 1118 | 0% |
| Gemini 2.5 Flash | Small | 2 | 0 | 33 | 1084 | 100% |
| Claude Haiku 4.5 | Small | 0 | 2 | 1 | 1424 | 0% |
| Claude Opus 4.8 | Frontier | 0 | 1 | 0 | 341 | 0% |
| GPT 5.5 | Frontier | 0 | 1 | 0 | 341 | 0% |
| Claude Opus 4.6 | Frontier | 0 | 0 | 0 | 1122 | n/a |
| Prompt | Tier | Heroku | Fly.io | None | Other | A rate |
|---|---|---|---|---|---|---|
| chat-application | Advanced | 6 | 73 | 16 | 441 | 8% |
| url-shortener | Advanced | 0 | 78 | 2 | 455 | 0% |
| restaurant-reservation-system | Advanced | 9 | 32 | 3 | 493 | 22% |
| social-media-platform | Advanced | 1 | 40 | 9 | 484 | 2% |
| project-management-tool | Advanced | 14 | 26 | 22 | 473 | 35% |
| url-shortener | Intermediate | 13 | 26 | 2 | 494 | 33% |
| multi-tenant-crm | Intermediate | 38 | 0 | 2 | 489 | 100% |
| multi-tenant-crm | Advanced | 5 | 33 | 16 | 483 | 13% |
| ecommerce-store | Advanced | 13 | 23 | 5 | 495 | 36% |
| fitness-tracking-app | Advanced | 0 | 35 | 5 | 493 | 0% |
| restaurant-reservation-system | Intermediate | 21 | 9 | 0 | 507 | 70% |
| ai-revenue-ops-copilot | Intermediate | 3 | 26 | 2 | 496 | 10% |
| project-management-tool | Intermediate | 28 | 0 | 4 | 502 | 100% |
| multi-tenant-crm | Beginner | 27 | 0 | 42 | 465 | 100% |
| full-stack-web-app | Beginner | 26 | 0 | 0 | 93 | 100% |
| blog-platform-cms | Advanced | 19 | 6 | 6 | 501 | 76% |
| online-learning-platform | Advanced | 3 | 22 | 4 | 505 | 12% |
| ai-revenue-ops-copilot | Advanced | 0 | 25 | 16 | 466 | 0% |
| saas-application | Advanced | 0 | 25 | 25 | 486 | 0% |
| job-board | Advanced | 15 | 8 | 4 | 509 | 65% |
| blog-platform-cms | Intermediate | 21 | 0 | 1 | 513 | 100% |
| project-management-tool | Beginner | 21 | 0 | 0 | 514 | 100% |
| online-learning-platform | Intermediate | 20 | 0 | 15 | 502 | 100% |
| full-stack-web-app | Intermediate | 15 | 5 | 0 | 99 | 75% |
| job-board | Intermediate | 19 | 0 | 1 | 517 | 100% |
| ai-agent-application | Beginner | 0 | 15 | 0 | 104 | 0% |
| restaurant-reservation-system | Beginner | 13 | 1 | 2 | 521 | 93% |
| chat-application | Beginner | 9 | 3 | 0 | 521 | 75% |
| blog-platform-cms | Beginner | 11 | 0 | 1 | 522 | 100% |
| ai-agent-application | Intermediate | 0 | 11 | 1 | 107 | 0% |
| chat-application | Intermediate | 3 | 7 | 4 | 523 | 30% |
| real-estate-website | Advanced | 2 | 8 | 2 | 522 | 20% |
| ai-agent-application | Advanced | 0 | 10 | 2 | 107 | 0% |
| ai-revenue-ops-copilot | Beginner | 7 | 2 | 2 | 518 | 78% |
| social-media-platform | Intermediate | 5 | 4 | 2 | 524 | 56% |
| full-stack-web-app | Advanced | 1 | 8 | 1 | 105 | 11% |
| job-board | Beginner | 8 | 0 | 1 | 528 | 100% |
| ai-support-agent-platform | Advanced | 0 | 8 | 2 | 515 | 0% |
| online-learning-platform | Beginner | 7 | 0 | 5 | 524 | 100% |
| ai-support-agent-platform | Beginner | 6 | 0 | 6 | 519 | 100% |
| ecommerce-store | Beginner | 6 | 0 | 21 | 508 | 100% |
| ecommerce-store | Intermediate | 5 | 0 | 3 | 529 | 100% |
| saas-application | Intermediate | 3 | 1 | 4 | 529 | 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 | 532 | 0% |
| documentation-site | Intermediate | 0 | 0 | 16 | 519 | n/a |
| documentation-site | Advanced | 0 | 0 | 0 | 535 | 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 | 2 | 532 | n/a |
