Backend Framework

Flask vs Fastify

FlaskFastify

30%

70%

Leading: Fastify (70.0%)

Insufficient data

This matchup has 10 decisive cases (minimum 30 required for publication).

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Model range	Tier	Flask	Fastify	None	Other	A rate
DeepSeek Flash 3.2–4.1	Mid	0	0	0	46	n/a
DeepSeek Pro 4–4 0813	Frontier	0	0	0	53	n/a
DeepSeek R1	Frontier	0	0	1	51	n/a
Devstral	Mid	1	0	0	41	100%
Gemini Flash 2.5–3.8	Small	0	1	1	52	0%
Gemini Pro 2.5–3.1 Preview	Frontier	0	0	1	53	n/a
GLM 5 Turbo–5.3	Frontier	0	0	0	54	n/a
GPT 5.4–6 Astra	Frontier	0	0	0	54	n/a
GPT Coding 5.3 Codex–6.1 Sol	Frontier	0	1	0	53	0%
GPT Mini 5.4 Mini–6 Luna	Mid	0	0	0	53	n/a
Haiku	Small	0	0	0	45	n/a
Kimi 2.5–3	Frontier	0	0	0	53	n/a
Llama Maverick	Frontier	0	0	1	53	n/a
Llama Scout	Small	2	0	0	52	100%
MiMo Pro 2–2.6	Frontier	0	0	0	54	n/a
MiniMax M 2.7–3	Frontier	0	0	0	54	n/a
Mistral Small	Mid	0	0	0	45	n/a
Opus 4.6–5.5	Frontier	0	0	0	54	n/a
Qwen Coder	Mid	0	0	0	54	n/a
Sonnet 4.6–5.5	Frontier	0	5	0	49	0%

Prompt	Tier	Flask	Fastify	None	Other	A rate
full-stack-web-app	Intermediate	0	7	0	169	0%
full-stack-web-app	Beginner	2	0	0	176	100%
ai-agent-application	Intermediate	1	0	1	176	100%
ai-agent-application	Advanced	0	0	2	176	n/a
ai-agent-application	Beginner	0	0	0	178	n/a
full-stack-web-app	Advanced	0	0	1	148	n/a