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10/15/2026

Developer Clones Microsoft Office Suite Using Anthropic’s Claude AI

What happened: Brandon Thomas, a developer with 15 years of experience, released open-source clones of Microsoft Word, Excel, and PowerPoint—dubbed WordCraft, GridCraft, and DeckCraft—using Anthropic’

Developer Clones Microsoft Office Suite Using Anthropic’s Claude AI

What happened: Brandon Thomas, a developer with 15 years of experience, released open-source clones of Microsoft Word, Excel, and PowerPoint—dubbed WordCraft, GridCraft, and DeckCraft—using Anthropic’s Claude Opus 5.5. The tools, written in Rust and licensed under MIT and Apache 2.0, support major file formats and run offline. The software covers 88% of Word’s ribbon features, 513 of 523 Excel worksheet functions, and 79% of PowerPoint’s core capabilities, though all are considered early alpha releases.

Why it matters: The rapid development and release of these tools—less than two weeks after similar Adobe clones—demonstrate how AI is lowering the barrier to replicating complex, proprietary software. While the clones are not yet production-ready, they challenge the $99.99/year Microsoft 365 model and signal potential disruption in the productivity software market. The project’s transparency and open licensing may accelerate community-driven improvements and adoption.

Source: Decrypt