Google Jules: The Coding Agent That Writes Pull Requests in the Background

Google’s autonomous coding agent clones your repo into a Cloud VM, writes the code, and opens a pull request, with the Ultra tier running 60 tasks in parallel on Gemini 3.1 Pro.
artificial-intelligence
software-engineering
Author

Kabui, Charles

Published

2026-05-28

Keywords

google-jules, asynchronous-coding-agent, gemini-3-pro, cloud-vm-agent, ai-pull-requests

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Jules is Google’s autonomous coding agent, powered by Gemini 3.1 Pro. Unlike Cursor or Claude Code, which sit in your editor waiting for the next prompt, Jules runs asynchronously. You give it a task such as bumping Next.js to 15, and Jules clones your repo into a Google Cloud VM, drafts a plan you can edit, writes the code, and opens a pull request on GitHub. A “Planning Critic” agent reviews every auto-approved plan, which Google says cut task failure rates by 9.5%. The Pro tier runs 100 tasks per day with 15 concurrent; Ultra runs 300 per day with 60 concurrent. The free tier on Gemini 3 Flash gives 15 per day.

The asynchronous model changes the unit of work. With Cursor or Codex you read every diff, type the next instruction, repeat. With Jules you fire off a task and walk away. When the resulting PR fails CI on GitHub Actions, Jules’s CI Fixer reads the logs, pushes a fix to the same PR, and re-runs the checks on its own. Scheduled tasks handle weekly dependency bumps and nightly lint fixes on a cron. Sixty parallel tasks on Ultra runs like a small team of junior contributors filing PRs all day.

The interaction model is the bet. Cursor and Claude Code train you to think in tight prompt loops; Google trains you to think in pull requests. If the reviewer-only workflow scales, the bottleneck shifts from how fast you can type to how fast you can read and approve.

Read More: For Google’s other I/O 2026 coding play, see Antigravity 2.0 goes agent-only.

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Citation

BibTeX citation:
@misc{kabui2026,
  author = {{Kabui, Charles}},
  title = {Google {Jules:} {The} {Coding} {Agent} {That} {Writes} {Pull}
    {Requests} in the {Background}},
  date = {2026-05-28},
  url = {https://toknow.ai/posts/google-jules-asynchronous-coding-agent-cloud-vm-pull-requests/},
  langid = {en-GB}
}
For attribution, please cite this work as:
Kabui, Charles. 2026. “Google Jules: The Coding Agent That Writes Pull Requests in the Background.” https://toknow.ai/posts/google-jules-asynchronous-coding-agent-cloud-vm-pull-requests/.