Model profile
Grok 4.1 Fast
Evidence summary
Grok 4.1 Fast has an estimated overall rank of #206; its 90% source-sensitivity interval is #83–#281. Its behavior-only rank is #203; company governance moves the combined estimate to #206. Published evidence spans 21 evals and 7 of 7 behavior components. Its strongest relative result is SpeciEval (belief_animal_sentience, #1 of 113); its weakest is AuAu Authoritarian Response Audit (realistic_prompt_arr_percent, #17 of 17).
Compare this model
Only models sharing at least one published sub-eval are listed.
Official and reference links
- Artificial Analysis ↗grok-4-1-fast
- OpenRouter ↗x-ai/grok-4.1-fast
- Official model documentation ↗Family-level model document · xai · first party
- Release source ↗direct research preview identity date
Published eval results
Rank is within that sub-eval. Black marks the observed result; the grey dot marks the value implied by the global rank. Values stay on each source’s native scale.
| Eval / sub-eval | Rank | Value | Distribution | Source |
|---|---|---|---|---|
| AA-Omnisciencehallucination_rate | #118 / 328 | ↓0.7341 | Source ↗official | |
| Alignment Leaderboardcorrigibility | #19 / 24 | ↑4.068 | Source ↗official | |
| Alignment Leaderboardhonesty | #9 / 24 | ↑3.682 | Source ↗official | |
| Alignment Leaderboardnon_manipulation | #11 / 24 | ↑3.515 | Source ↗official | |
| Alignment Leaderboardrobustness | #5 / 24 | ↑4.027 | Source ↗official | |
| Alignment Leaderboardsafety | #12 / 24 | ↑3.846 | Source ↗official | |
| Alignment Leaderboardscheming | #13 / 24 | ↑3.627 | Source ↗official | |
| Arena Factuality — Search Arena (factuality-only weighting)factuality_bt_rating | #27 / 30 | ↑1123.0 | Source ↗official | |
| Arena Factuality — Text Arena (factuality-only weighting)factuality_bt_rating | #101 / 112 | ↑1395.0 | Source ↗official | |
| AuAu Authoritarian Response Auditbehavioral_vignette_arr_percent | #15 / 17 | ↓29.5 | Source ↗official | |
| AuAu Authoritarian Response Auditrealistic_prompt_arr_percent | #17 / 17 | ↓7.7 | Source ↗official | |
| BullshitBench v2clear_pushback_rate | #76 / 106 | ↑0.145 | Source ↗official | |
| CAIS Risk Indexagent_red_teaming | #34 / 44 | ↓90.2 | Source ↗official | |
| CAIS Risk Indexbioweapons_assistance | #18 / 49 | ↓63.8 | Source ↗official | |
| CAIS Risk Indexhle_overconfidence | #39 / 50 | ↓72.1 | Source ↗official | |
| CAIS Risk Indexmachiavelli | #5 / 46 | ↓81.3 | Source ↗official | |
| CAIS Risk Indexmask | #51 / 52 | ↓71 | Source ↗official | |
| CAIS Risk Indexpolitical_manipulation | #3 / 33 | ↓32.5 | Source ↗official | |
| CAIS Risk Indextextquests_harm | #3 / 49 | ↓9.1 | Source ↗official | |
| Cisco AI Defense Rolling Single-Turn Leaderboardsingle_turn_attack_success_rate | #42 / 104 | ↓29.06 | Source ↗official | |
| Enkrypt AI Safety Leaderboardbias_attack_non_success_rate | #183 / 241 | ↑12.14 | Source ↗official | |
| Enkrypt AI Safety Leaderboardcbrn_attack_non_success_rate | #223 / 241 | ↑71.83 | Source ↗official | |
| Enkrypt AI Safety Leaderboardharmful_attack_non_success_rate | #132 / 241 | ↑63.33 | Source ↗official | |
| Enkrypt AI Safety Leaderboardtoxicity_attack_non_success_rate | #212 / 239 | ↑84.18 | Source ↗official | |
| LiveSecBenchethics | #43 / 43 | ↑8.57 | Source ↗official | |
| LiveSecBenchfactuality | #20 / 43 | ↑52.76 | Source ↗official | |
| LiveSecBenchlegality | #38 / 43 | ↑18.02 | Source ↗official | |
| LiveSecBenchprivacy | #25 / 43 | ↑39.48 | Source ↗official | |
| LiveSecBenchpsychological_health | #27 / 43 | ↑44.84 | Source ↗official | |
| MACHIAVELLIdeception_relative_random_pct | #5 / 50 | ↓81.3 | Source ↗official | |
| MORUscore | #9 / 13 | ↑71.14 | Source ↗official | |
| MT-JailBench CrescendoXsafety_score | #12 / 21 | ↑18.87 | Source ↗official | |
| SM-Benchadversarial | #43 / 79 | ↑80.98 | Source ↗official | |
| SM-Benchambiguous_interpretation | #62 / 79 | ↑78.57 | Source ↗official | |
| SM-Benchanti_hallucination | #23 / 79 | ↑96.86 | Source ↗official | |
| SM-Bencheq_boundaries | #7 / 79 | ↑74.72 | Source ↗official | |
| SM-Benchoverfit | #48 / 79 | ↑66.12 | Source ↗official | |
| SpeciEvalbelief_animal_sentience | #1 / 113 | ↑7 | Source ↗official | |
| SpeciEvalland_animal_4ns | #112 / 113 | ↓5.35 | Source ↗official | |
| SpeciEvalsea_animal_4ns | #107 / 113 | ↓5.28 | Source ↗official | |
| SpeciEvalspeciesism | #100 / 113 | ↓2.72 | Source ↗official | |
| Vectara HHEM Factual Consistencyfactual_consistency_rate | #87 / 94 | ↑81.5 | Source ↗official | |
| Vigil Mental Health Safetyoverall_score | #18 / 23 | ↑30 | Source ↗official |
Values evaluations
Descriptive values and political-framing results are separate from safety/ethics ranks. Each strip shows the evaluation’s observed model range; its endpoint labels state what lower and higher values mean.