Head-to-head
Bun vs Deno
Bun leads: the AI models rank it above its rival on 1 of the 1 leaderboard they share. Based on how ChatGPT, Claude, Gemini & Grok rank both across the leaderboard they share — re-polled on demand, reasoning shown verbatim.
| Leaderboard | Bun | Deno |
|---|---|---|
| Best JavaScript runtime | #2 / 6 | #3 / 6 |
Why the models rank Bun — on best javascript runtime
“Fastest real-world cold starts, package installs (often 10-30x npm), HTTP throughput and test runs across 2026 benchmarks; native TypeScript execution with full feature support; single binary that replaces package manager + bundler + test runner, delivering the highest daily iteration speed and lowest toolchain friction for typical backend/CLI/serverless practitioners while maintaining ~95-98% Node API and npm compatibility.”
Why the models rank Deno — on best javascript runtime
“Near-tied with Bun; it takes second for its coherent TypeScript workflow, built-in checking, formatting, linting, testing, auditing and compilation, granular permissions, web-standard APIs, and increasingly practical Node/npm compatibility.”
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Ranks from the merged 4-model leaderboards · re-polled on demand · methodology