Open-source browser agent fastbrowse is 71x cheaper per task than hosted Browser Use
Scobleizer · x · 2026-09-21
fastbrowse (MIT, open source) takes a different approach to browser agents: instead of generating each action from a screenshot, it indexes the page into the controls that actually exist, has the LLM pick one, gates it with deterministic code, and cites a verbatim quote for every claim in the answer.
Its eval claims near-tie reliability with hosted Browser Use on 42 tasks (41/42 vs 42/42) at $0.0057 vs $0.4070 per task (71x cheaper), with a checkout flow 4.8x faster (36.3s vs 173.9s). Notable safety details: passwords never reach the model (--secret lets code type the value directly), and irreversible actions require explicit --authorize. Try it with uvx fastbrowse. Still early and experimental.
Related event: Open-Source Browser Agent fastbrowse Claims 71x Cost Cut(2 posts)→
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