Andrew Curran relays Business Insider: Google is internally testing a Gemini 4 checkpoint named ‘Carbon’ that matches Opus 5.5 in coding
Andrew Curran @AndrewCurran_X
Why it matters
Most-viewed post on the Business Insider ‘Carbon’ scoop (~188k views on Oct 10, fxtwitter); second-hand, staff impressions only.
Summary
Andrew Curran summarised Business Insider’s Oct 9 report (scoop by Hugh Langley) that Google staff are testing a new Gemini 4 checkpoint codenamed Carbon, which some compare to Claude Opus 5.5 for coding. Langley’s own post (https://x.com/HughLangley/status/2108656265379676660) adds that the comparisons are “mostly ~vibes~” until real-world use. Read via api.fxtwitter.com on 2026-10-10: about 188k views, 979 likes.
Archived text
Business Insider is reporting that Google is internally testing a new Gemini 4 checkpoint named Carbon that matches Opus 5.5 in coding.
