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Oct 10, 2026 · Artificial Intelligence

Google Tests Gemini 4 'Carbon' Internally as Argon Launch Stalls: 'Feels Like Opus 5.5'

Google is internally testing a new Gemini 4 checkpoint codenamed Carbon, which employees say matches Anthropic's Opus 5.5 for coding, while the already-announced Argon model remains unavailable to most users despite strong benchmarks in long-context software engineering but weaknesses in terminal interaction.