Benchmark: Models Build Vector Databases From Scratch, Fable-5.1 Tops With High Variance

A developer benchmarked leading LLMs by having them build vector databases from scratch, scoring performance across three runs. Fable-5.1 hit the highest score (21191.51) but fluctuated over 50%, while GPT6-Astra proved the most stable.

2026-09-14 ~ 2026-09-14 · 2 related posts

• DIY Vector DB Benchmark: Fable-5.1 Tops Agentic Coding but Swings 50%, GPT6-Astra Most Stable — karminski3 · 2026-09-14
• Full Leaderboard Released for LLM Backend Coding Benchmark (Vector DB from Scratch) — karminski3 · 2026-09-14