people · May 20, 2026
Google Gemini Spark Uses Antigravity Harness on Gemini 3.5
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Simon Willison posted a question on May 20, 2026 about Google’s Gemini Spark product. The product runs on Gemini 3.5 and uses the Antigravity harness. Users in the thread compared Antigravity to Google’s Codex or ClaudeCode competitor and discussed its similarity to open Claw setups. One reply confirmed Antigravity functions as the agent harness in the described configuration.
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