xAI · proprietary

Grok 4 Fast

Grok 4 Fast by xAI appears in 1 source with Reasoning at 40.93. Best read for LLM, Long context, Low cost.

CreatorxAI

Release date2025-08-28

Knowledge cutoffNot published

Context2M tokens

Input price$0.2/M tokens

Output price$0.5/M tokens

Modalitytext + vision

CountryUS

Metrics

All source-backed metrics

Open in leaderboard

LLM Stats Rank54ranking · source_rank

Reasoning40.93reasoning · index_reasoning

Math36.56math · index_math

Coding26.31coding · index_code

Research6.32research · index_search

Vision16.61multimodal · index_vision

GPQA85.7 %reasoning · gpqa_score

AIME 202592 %math · aime_2025_score

Code Arena915.82 %coding · coding_arena_score

Humanity Last Exam20 %reasoning · hle_score

SimpleQA95 %knowledge · simpleqa_score

BrowseComp44.9 %research · browsecomp_score

Context2,000,000 tokenscontext · context

Speed292.28 c/sperformance · throughput

Latency5,434.6 msperformance · latency

Input price0.2 $/Mpricing · input_price

Output price0.5 $/Mpricing · output_price

Evidence

Citations and source overlap

LLM StatsPublic full LLM leaderboard advanced explorer snapshot, including ranking, benchmark indexes, pricing, speed, context, license, and model metadata.Retrieved 2026-06-01

FAQ

How should I read this profile?

Treat this as a source-backed model dossier, not an EvalKit-run verification. The public values are replicated from linked sources and kept source-scoped.

Is Grok 4 Fast verified by EvalKit?

No. EvalKit currently shows 0 verified rows until real run evidence exists.

Why can metrics disagree?

Different sources test different tasks, dates, prompts, and aggregation methods. EvalKit keeps those differences visible instead of merging them into a fake universal score.