October 29, 2026 · 5 min read
Anthropic's S-1: what the IPO filing says about Claude Code, MCP and AI-written code
Anthropic filed its S-1 on 2026-10-26. Past the headline loss, the filing says Claude wrote over 90% of its code contributions, flags copyleft risk in AI-written code, calls MCP donated to the Linux Foundation, and measures cost per task. What the table says, what the risk factors say, and what is still blank.



