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Oct 9, 2026

Google reportedly testing Gemini 4 Carbon model matching Anthropic's Opus 5.5

Google is reportedly testing a more powerful Gemini 4 model codenamed Carbon that matches Anthropic's Claude Opus 5.5 coding performance, according to internal employee reports cited by Business Insider.

Oct 9, 2026·2 sources

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Top claims

▪Google internal testers reported that the Gemini 4 Carbon model demonstrated coding capabilities comparable to Anthropic's flagship Opus 5.5 model for long-term agentic programming
▪Google internal discussions referred to the Carbon variant as 'Gemini pro next model,' indicating it could be deployed as a future checkpoint or update to Argon
▪OpenAI and Anthropic have reported similar progress in using artificial intelligence to build new models

Topics

Gemini 4 Argon Large language models (LLMs)AI research & benchmarks AI foundation models AI coding assistants