EsoLang-Bench: leaderboard
Tests genuine reasoning via code generation in 5 esoteric programming languages (Brainfuck, Befunge-98, Whitespace, Unlambda, Shakespeare). 80 problems per language with 6 test cases each. Frontier models score ~90% on equivalent Python tasks but only ~4% here.
Metric: Accuracy (%). Source: esolang-bench.vercel.app. Saturation forecast: Around 2030. 5 models tracked.
Top models
| # | Model | Score | Overall rank |
|---|---|---|---|
| 1 | GPT-5.2 | 4.2 | #110 |
| 2 | O4 Mini | 3.2 | #180 |
| 3 | Gemini 3 Pro | 2.7 | #80 |
| 4 | Qwen 3 235B A22B | 1 | #313 |
| 5 | Kimi K2 | 0.7 | #243 |
No result here: #3 Claude Opus 5.5, #6 GPT-6 Astra, #7 GPT-6.1 Sol.
Interactive version: theaggregate.ai/benchmark?slug=esolang-bench · How It Works · Data refreshed daily, snapshot 2026-10-20.