Antigravity agent runtime upgrade: 30% cheaper multi-turn coding, 8% higher task completion

_philschmid · x · 2026-09-18

Phil Schmid details the antigravity-preview-09-2026 managed agent runtime upgrade: runs on Gemini 3.8 Flash by default, with a persistent Linux sandbox (bash, file tools, Google Search, URL context). Higher cache hits cut multi-turn coding costs 30% and reasoning costs 17%; file edits use 40% fewer tokens with up to 8% higher task completion on SWE and research evals. Includes automatic context compaction at 135k tokens and reusable agent configs via agents.create().

Related event: Google Ships antigravity-preview-09-2026 for Gemini Managed Agents with Files and Credentials APIs(6 posts)→

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