Alumnium – SOTA Browsing for Claude Code
Alumnium MCP used with Claude Code achieves 98.5% pass rate on WebVoyager, beating the previous SOTA of 97.1% — for about $5 in total API costs.
Alumnium – SOTA Browsing for Claude Code launched on March 27, 2026 with 6 votes, #1,631 of 23,380 launches that month and more than 75% of that year's launches.
What it does
Today we’re publishing the full results: Alumnium MCP used with Claude Code achieves 98.5% on the WebVoyager benchmark — a new state of the art, beating the previous best of 97.1% by Surfer 2 . Since Alumnium is an open-source project, we share the full results, including session transcripts, screenshots, and evaluator responses at webvoyager.alumnium.ai . We also share all code to reproduce the benchmark results in our WebVoyager fork . Before getting to the results, it’s worth framing what kind of agent we’re building here — because there are fundamentally two very different ways to approach this. The first approach is to build a dedicated, fully autonomous browser agent. Magnitude is a…from alumnium.ai
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