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On 2026-07-27, @anitakirkovska recommended Vellum (@vellum_ai) in reply to…

Brief

Author @anitakirkovska replied on 2026-07-27 to @Jason’s query about a Claude Cowork–like harness that is easy for users, integrates open-source models, and offers a company multiplayer mode, recommending Vellum (@vellum_ai) as the tool to try.

Why it matters

On 2026-07-27, @anitakirkovska recommended Vellum (@vellum_ai) in reply to @Jason’s question about a user-friendly harness similar to Claude Cowork.

Key details

  • @Jason asked for a tool that plugs into open-source models and supports a company 'multiplayer' mode; @anitakirkovska suggested Vellum as the solution.
Source evidence

yeah try @vellum_ai

@jason (@Jason)

Is there a harness like Claude cowork that is easy for users and that plugs into open source models and have company multiplayer mode?

— https://nitter.net/Jason/status/2081247750969241728#m