Expired50% confidenceEventExact time
The system prompt of Claude Code's latest version Fable 5 was leaked on the day of its release, with the prompt approaching 100,000 characters in length.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/2/2026
First Seen
Valid until: 9/30/2026(expired)
Sources
Related Claims
UnverifiedBy May 2025, over 80% of the code in Anthropic's codebase was written by Claude, up from single digits just over a year ago.63% similarUnverifiedIn early 2025, the core application-layer code of Claude Code circulated and leaked within the community.62% similarUnverifiedClaude Code version 4.7 is the latest iteration as of the article's publication date.61% similarVerifiedThe version number of Claude Code after installation is 2.1.104.59% similarUnverifiedAfter Claude Code's public release, growth plateaued for a time until the release of Opus 4 marked a turning point.59% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/43702API
curl https://kongchang.com/api/v1/knowledge/claims/43702MCP
get_claim(id=43702)