Anthropic issues takedown over Claude code source leak

Anthropic issued a takedown notice against a developer who reverse-engineered its AI tool, Claude Code, and uploaded the source code to GitHub.

The tool operates under a restrictive commercial license, unlike OpenAI’s Codex CLI, which is distributed under the more permissive Apache 2.0 license.

Anthropic filed a Digital Millennium Copyright Act (DMCA) complaint, citing copyright infringement.

Claude Code and Codex CLI are both AI-powered tools for developers. While Codex CLI allows distribution and commercial modification, Claude Code’s usage is limited by its licensing terms.

🔗 Source: TechCrunch

🧠 Food for thought

1️⃣ Licensing strategies reflect diverging AI business philosophies

The contrast between Anthropic’s restrictive approach and OpenAI’s more permissive licensing reveals fundamentally different business philosophies in the AI space.

OpenAI’s Apache 2.0 license for Codex CLI allows for distribution, modification, and commercial use, fostering community engagement and attracting developers who value transparency 1.

This approach aligns with what appears to be a strategic shift for OpenAI, whose CEO Sam Altman recently acknowledged the company had been on the “wrong side of history” regarding open source.

Anthropic’s more restrictive Business Source License for Claude Code reflects a traditional software licensing model focused on protecting proprietary technology and controlling distribution 2.

The developer backlash against Anthropic’s takedown notice demonstrates how licensing choices directly impact community sentiment and adoption in the competitive AI tools market.

This tension between open and closed approaches mirrors historical patterns in software development, where community-driven projects often gain adoption advantages despite potential revenue challenges.

2️⃣ DMCA takedowns reveal the complex balance between copyright protection and innovation

Anthropic’s use of the DMCA against a developer reverse-engineering Claude Code highlights the ongoing tension between intellectual property protection and collaborative innovation.

DMCA notices have increased significantly on platforms like GitHub, with data showing nearly double the takedown notices in 2015 compared to 2014, indicating a growing trend in aggressive copyright enforcement 3.