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aiqbench

xAI · model passport

Grok 4 1 Fast Reasoning

grok-4-1-fast-reasoning
  • Cloud only
  • Proprietary licence
  • Released 2026-10-09(first seen on LMArena)
11/27axes covered
Overall · LMArena
1,430#103 of 396
Best percentile
95.1BFCL v4 (function calling)
Cohort standing
53.0median 60.7

What the data says

Benchmarked on 11 of 27 tracked axes. Every figure below is the model's own published result on that board.

Strongest axes

  • 95.1 pct — BFCL v4 (function calling) (69.6%)

Weakest axes

  • 8.6 pct — HHEM Hallucination (Vectara) (80.8%)
  • 10.1 pct — WebDev Arena (1,242)

Uneven: 86.5 percentile points between its best and worst axis — 95.1 pct on BFCL v4 (function calling) versus 8.6 pct on HHEM Hallucination (Vectara).

  • BFCL v4 (function calling)Dormant board95.1 pct69.6%Verify →
  • Overall74.2 pct1,430Verify →
  • Hard prompts70.2 pct1,441Verify →
  • Coding68.5 pct1,461Verify →
  • LiveBench68 pct63.0%Verify →
  • Instruction following66.9 pct1,402Verify →
  • SimpleBench62.1 pct56.0%Verify →
  • Vision Arena44.7 pct1,196Verify →
  • Factuality Arena23.3 pct1,413Verify →
  • WebDev Arena10.1 pct1,242Verify →
  • HHEM Hallucination (Vectara)8.6 pct80.8%Verify →
  • Search ArenaNot benchmarked
  • Document ArenaNot benchmarked
  • Agent ArenaNot benchmarked
  • GPQA DiamondNot benchmarked
  • AIME (math)Not benchmarked
  • FrontierMathNot benchmarked
  • SimpleQA VerifiedNot benchmarked
  • ARC-AGI-2Not benchmarked
  • Humanity's Last ExamNot benchmarked
  • SWE-bench Verified (live board)Not benchmarked
  • Terminal-Bench 4.0Not benchmarked
  • MMLU-Pro (Artificial Analysis)Not benchmarked
  • LiveCodeBench (Artificial Analysis)Not benchmarked
  • IFBench (Artificial Analysis)Not benchmarked
  • SWE-bench VerifiedNot benchmarked
  • Terminal-BenchNot benchmarked

Percentiles are the model's standing within each board's own population. Axes marked "not benchmarked" have no published result for this model — that is an absence of data, not a low score.

  • grok-4-1-fast-reasoning stands at 53 (raw mean 53.8) — measured on 11 of 27 axes.

    standingtemplateVerify →

  • grok-4-1-fast-reasoning stands at 53 versus a cohort median of 60.7 across 171 models released within 180 days — below the peer median.

    cohorttemplateVerify →

Every claim is a computed fact from the current board data, phrased by a low-temperature model call and rejected by a validation gate if any number is not in the source row. How the leaderboards work →