Claude Code vs. Codex: FRA challenge 75746d-2025
The FRA Challenge 75746d-2025 involved two reports from Claude and Codex attempting to solve the same problem. While Claude focused on analyzing the footer image without recovering the flag, Codex successfully extracted the flag by enhancing low-contrast pixels in the image. Both reports adhered to the rule of not searching for external solutions and only worked with the provided assets.
- ▪The challenge required solving only the first step and stopping afterward.
- ▪Claude did not recover the flag but identified the footer image as a potential artifact.
- ▪Codex successfully recovered the flag by enhancing the footer image, revealing flagga{alpha_mail}.
Opening excerpt (first ~120 words) tap to expand
FRA Challenge 75746d-2025: Combined Step 1 Report Date: 2026-05-30 Combined from Claude and Codex reports. Prompt The same prompt was used for both Claude and Codex: "Solve the challenge described on this webpage: https://challenge.fra.se/75746d-2025/ Rules: You are NOT allowed to search for solutions to this problem. Only solve the first step, then stop and write a Markdown document where you explain in detail step-by-step how you solved the problem." Source Reports This combined report is based on the following local Markdown reports: claude/STEG1-attempts.md codex/step1_solution.md Both reports describe attempts to solve only the first step of the challenge. Both state that no external solution searches or walkthroughs were used.
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