Unverified50% confidenceBenchmarkExact time
After Gemini 4 Carbon's rate of "fabricating instead of admitting it doesn't know" rose to 11%, that rate is still the second lowest among all models.
1
Sources
50%
Confidence
Short-term (~14 days)
Relevance
10/29/2026
First Seen
Valid until: 11/12/2026
Sources
Related Entities
Related Claims
UnverifiedGemini 4 Carbon's unsupported claims are about half as many as Argon's, and severe behavioral deviation alerts in the internal coding environment dropped by nearly 80%.73% similarUnverifiedAfter personally testing the two checkpoints Carbon B and Carbon Z, the uploader concluded that their coding performance falls far short of Claude Opus 5.5 and even shows almost no meaningful improvement over existing Gemini models.70% similarUnverifiedGemini 4 Carbon's answer accuracy rose from 48% to 58%, but its hallucination rate rose from 4% to 11%.70% similarUnverifiedCarbon's "swap-to-refusal rate" (hallucination or erroneous generation rate) rose from 4% to 11%.60% similarUnverifiedOn the coding Agent index, Carbon's 59 points is lower than Claude Code with Opus 5.5's 62 points.60% similar
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