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10x-bench: Instructions file for Claude Code

CLAUDE.md

10x-bench CLAUDE.md is an instructions file for Claude Code from przeprogramowani/10x-bench. It costs 2,013 tokens per session, scanned A, original, MIT.

Project instructions for 10xBench, a benchmark that compares how AI models create complete websites from one prompt. It explains the project structure, development commands, result processing, and evaluation workflow.

In plain words
What is it for?
Use it to run the Astro development server, build the production site, turn result CSV files into results.json, and score model attempts.
Why use it?
It gives a coding agent the project-specific context needed to build the site, process benchmark results, and follow the repository's evaluation process.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md; names the AskUserQuestion tool; mentions Claude Code.

This is przeprogramowani/10x-bench's own configuration. It tells Claude Code how to work on 10x-bench itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything 10x-bench configures →

not rated 14repo +1 changed 27d ago A scan 2,013 tokens original MIT
View source ↗ przeprogramowani/10x-bench 10xbench.ai
Reuse

Borrowing it

Nothing to install: this file belongs to przeprogramowani/10x-bench. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/przeprogramowani/10x-bench/master/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/przeprogramowani/10x-bench

Made for: Claude Code.

Wrote this? Show the measurements

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README.md
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<a href="https://agentmods.dev/instructions/przeprogramowani/10x-bench/claude-md"><img src="https://agentmods.dev/badge/instructions/przeprogramowani/10x-bench/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

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Your own site · 80×15
<a href="https://agentmods.dev/instructions/przeprogramowani/10x-bench/claude-md"><img src="https://agentmods.dev/badge/instructions/przeprogramowani/10x-bench/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 2,013 This file is loaded in full into every session.
When invoked 2,013 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.02013 $0.02013
Opus 5.5 $0.00805 $0.00805
Sonnet 5.5 $0.00403 $0.00403
Haiku 4.5 $0.00201 $0.00201

Measured 27d ago against content hash b196a6d1d7cd, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

10x-bench CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 27d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 208 lines

How it starts

The opening of the file, as written. The whole thing — 208 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

10xBench is a comprehensive benchmark comparing how different large language models handle "vibe coding"—creating a fully functional website for Przeprogramowani.pl in a single attempt without iterative refinement.

Each of four models (Claude Opus 4.6, GPT-5.3-Codex, Kimi K2.5, GLM-4.7) receives the same prompt and must generate a complete website implementation. Results are systematically evaluated against defined criteria and presented in an interactive dashboard.

Quick Start Commands

Development & Building

# Process results CSV files and generate results.json
npm run process-results

# Start development server (Astro) with results processing
npm run dev

# Build production site
npm run build

# Development from website directory (for Astro only)
cd website && npm run dev
cd website && npm run build

Evaluation

# Run the evaluation skill to assess an implementation
/10x-score-attempts against <attempt-directory>

# Example:
/10x-score-attempts against claude opus attempt 1

Project Structure

Core Directories

  • ./scripts/ — Data processing utilities

    • process-results.ts — TypeScript script that parses CSV evaluation files from each attempt and generates results.json

  • ./website/ — Astro-based results dashboard

    • src/pages/index.astro — Main results overview page
    • src/pages/benchmark.astro — Benchmark prompt and criteria page
    • src/components/ResultCard.tsx — Summary cards showing attempt scores
    • src/components/ResultsTable.tsx — Interactive comparison table with sticky headers
    • src/components/ModelAveragesCard.tsx — Model family average summaries
    • src/data/results.json — Generated data file (created by process-results.ts)

  • ./eval-attempts/ — Model implementations (one-shot attempts)

    • claude-opus-attempt-{1,2,3}/ — Claude Opus 4.6 implementations
    • gpt-codex-attempt-{1,2,3}/ — GPT-5.3-Codex implementations
    • kimi-k2.5-attempt-{1,2,3}/ — Kimi K2.5 implementations
    • glm-4.7-attempt-{1,2,3}/ — GLM-4.7 implementations
    • Each contains eval-result.csv with criterion-by-criterion scores

Read the full file on GitHub · 208 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago Changed · -192 lines · -1,603 tokens per session f25f92d6b389
  2. 2mo ago First seen · 208 lines · 2,013 tokens per session scan A b196a6d1d7cd

Subscribe to this mod's changes

10x-bench CLAUDE.md is an instructions file published in the GitHub repository przeprogramowani/10x-bench (14 stars, last pushed 20d ago), licensed MIT. It adds 2,013 tokens to every session, about $0.0081 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Claude Codeaicodexcursorgemini-3-pro
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