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Gemma 4 E4B

Googledeveloper
2026-03-31release date
#158 / 348Safety rank
#368 / 663Freedom rank

Evidence summary

Safety. Gemma 4 E4B has an estimated Safety rank of #158; its 90% source-sensitivity interval is #1–#317. Its behavior-only rank is #171; company governance moves the combined estimate to #158. Published Safety evidence spans 3 eval lineages and 4 of 7 components. Its strongest relative result is AA-Omniscience (hallucination_rate, #38 of 361); its weakest is Enkrypt AI Safety Leaderboard (bias_attack_non_success_rate, #259 of 272).

Freedom. Gemma 4 E4B has an estimated Freedom rank of #368; its 90% source-sensitivity interval is #234–#446. Published Freedom evidence spans 2 eval lineages and 1 of 1 components. Its strongest relative result is Enkrypt AI Safety Leaderboard (cbrn_attack_non_success_rate, #32 of 272); its weakest is Enkrypt AI Safety Leaderboard (toxicity_attack_non_success_rate, #195 of 270).

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Only models sharing at least one published sub-eval are listed.

Official and reference links

Safety evals

Rank and direction are specific to the Safety portfolio. Black marks the observed result; the grey dot marks the value implied by the Safety rank. Values stay on each source’s native scale.

Eval / sub-evalRankValueDistributionSource
AA-Omnisciencehallucination_rate#38 / 361↓0.3094Source ↗official
Enkrypt AI Safety Leaderboardbias_attack_non_success_rate#259 / 272↑6.2Source ↗official
Enkrypt AI Safety Leaderboardcbrn_attack_non_success_rate#240 / 272↑66.83Source ↗official
Enkrypt AI Safety Leaderboardharmful_attack_non_success_rate#94 / 272↑85.56Source ↗official
Enkrypt AI Safety Leaderboardtoxicity_attack_non_success_rate#74 / 270↑98Source ↗official
MT-JailBench CrescendoXsafety_score#11 / 21↑21.38Source ↗official

Freedom evals

Rank and direction are specific to the Freedom portfolio. Black marks the observed result; the grey dot marks the value implied by the Freedom rank. Values stay on each source’s native scale.

Eval / sub-evalRankValueDistributionSource
Enkrypt AI Safety Leaderboardcbrn_attack_non_success_rate#32 / 272↓66.83Source ↗official
Enkrypt AI Safety Leaderboardharmful_attack_non_success_rate#175 / 272↓85.56Source ↗official
Enkrypt AI Safety Leaderboardtoxicity_attack_non_success_rate#195 / 270↓98Source ↗official
MT-JailBench CrescendoXsafety_score#11 / 21↓21.38Source ↗official