Grok 4 Fast (Non-reasoning)

deprecated by benchmark source

xAI · released 2025-09-19 · 0 offers

Context 2M tokens

Providers

No provider publishes an API price for this model yet, so no cost can be modeled.

Composite

3 of 7 inputs · 2 from the model family6 radar axes: DesignArena's two boards share one

17.5

dominance-adjusted from 18.6: a better-measured model that is at least as good on each of these inputs ranks above it

AA Coding v4.x —Coding Agent v1.4 —AA Intelligence (est.) 5.0AA Agentic —Epoch ECI 144.2Software ECI 141.6DesignArena —/—

Radar: percentile among all models measured on each input; a gap means not measured.

Benchmark sheet

10 of 319 registered benchmark versions · bars show the percentile among all models measured on each benchmark.

Composite attachments (used in the score, not counted as exact benchmarks):

Epoch ECI · attached
Software ECI · attached

Compare this model →

Agentic

Terminal-Bench Hard (AA)4812.1%2026-09-10
Terminal-Bench Hard (AA) pinned revision 74221fb → · Published board — Tests a pinned 44-task hard subset of terminal-based work using Terminus 2.

Instruction-following

IFBench (AA single-turn)3237.7%2026-09-10
IFBench (AA single-turn) published 2026-09-10 → · Published board — Tests precise single-turn instructions with deterministic rule checks.

Knowledge

Humanity's Last Exam (AA text-only)234.5%2026-09-10
Humanity's Last Exam (AA text-only) published 2026-09-10 → · Published board — Tests expert-level knowledge on AA's text-only Humanity's Last Exam subset.
AA-Omniscience Index25-54.42026-09-10
AA-Omniscience Index published 2026-09-10 → · Published board — Tests factual reliability while rewarding correct answers and penalizing hallucinations.

Long-context

AA-LCR v1.12724.0%2026-09-10
AA-LCR v1.1 v1.1 → · Published board — Tests reasoning across multiple long documents with corrected answer keys and grading.

Math

AIME 2025 (AA)4341.3%2026-09-10
AIME 2025 (AA) v2025 → · Published board — Advanced mathematical problem solving on AIME I and II 2025.

Science

CritPt (AA)240.0%2026-09-10
CritPt (AA) published 2026-09-10 → · Published board — Tests research-level physics reasoning with Python, symbolic and numerical answers.
GPQA Diamond (AA)3660.6%2026-09-10
GPQA Diamond (AA) published 2026-09-10 → · Published board — Tests graduate-level biology, physics and chemistry knowledge on the Diamond subset.

Tool-use

τ²-Bench Telecom (AA)5963.7%2026-09-10
τ²-Bench Telecom (AA) published 2026-09-10 → · Published board — Tests dual-control telecom agents that coordinate tool use with a simulated user.

Vision

MMMU Pro (AA)1348.1%2026-09-10
MMMU Pro (AA) published 2026-09-10 → · Published board — Tests multimodal understanding using challenging ten-option questions.

Missing coverage · 309 benchmark versions

No result does not mean a zero, or that the model was never tested. Collection failures and disputed versions retain their distinct status.

Variants / reasoning settings

Artificial Analysis snapshot 2026-11-03 · Intelligence Index v5.0 (est. = estimated from v4, not measured) · Coding Index v4.x frozen 2026-10-27 · Data: Artificial Analysis · Data: Epoch AI (CC BY)

Variant	AA Coding	AA Intelligence
Grok 4 Fast (Non-reasoning)	—	5.0est.
Grok 4 Fast (Reasoning)	—	7.5est.