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Antigravity adds Claude Opus 5.5 and Sonnet 5.5, but only for paid Google AI Pro and Ultra plans, while the 4.6 models are removed on November 2, 2026.
Google’s Gemini 4 Argon brings competitive AI performance at introductory prices, but independent tests show uneven results against leading rivals.
Starting Oct. 9, 2026, free Gemini users lose 2 of 3 models, leaving only Flash-Lite. See how all 4 Google AI subscription tiers compare.