Google DeepMind released Gemini 4 Carbon just two weeks after Argon's release, with improvements across all capabilities

Google DeepMind released Gemini 4 Carbon just two weeks after the previous generation, Argon, rising to the top of Artificial Analysis's Intelligence Index v5.0 with 59 points, versus Argon's 50 points. According to Google, on Gray Swan's indirect prompt injection benchmark, Carbon reduced the attack success rate from Argon's 0.7% to 0.0%, and the article also notes that this is more a sign that the test has saturated. On safety benchmarks, Carbon scored 88.2% on SEC-bench Pro, 71.0% on CWE-Bench, and 54.8% on ExploitGym, all leading GPT-6 Astra and Argon. In Antigravity's agentic coding evaluation, Carbon still trails Claude Code paired with Opus 5.5 by three points.