Claude Code on GitHub Codespaces vs Machines, tested
Originally published on the QuickSilver Pro blog . GitHub Codespaces and QuickSilver Machines both give you a Linux box in the browser that a coding agent can treat as its own. We already compared their list prices and features . This time we ran the same Claude Code task on both, three times each, on 2026-11-05, and timed everything from creating the box to deleting it. Short version: The task…
Clueful Code, a coding agent running on GitHub's GitHub Codespaces and QuickSilver Machines, was tested to compare their performance. Both platforms provided a Linux environment in a browser that a coding agent could treat as its own. The same Claude Code software was used on both platforms, and the task was run three times each, with timings recorded for creating and deleting the environment.
The task, a 317-test refactoring task, took 24.0 seconds on Codespaces and 24.5 seconds on Machines, with the model and API being the same for both. However, Codespaces started faster, taking about 19 seconds from box creation to a working shell, compared to 35 seconds for the Machine. Once the Claude Code environment was set up, it operated immediately, while the Machine required a pause and resume for the same effect.
The price for using these platforms depends on the free quota of each. Codespaces is free until the monthly quota of a personal account runs out, then costs $0.18 per hour for 2 cores. Machines costs $0.02 per running hour from the first minute. The test shows that the box itself is not the bottleneck, and that a faster box would not noticeably improve the agent's performance. The difference lies in setup and price.
Written by urgent.news from Dev.to's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
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