xAI · proprietary

Grok-4 Fast Reasoning

Grok-4 Fast Reasoning by xAI appears in 1 source with LLM Stats Code Index (estimated from arena) at 26.07 score. 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 Rank81ranking · source_rank

LLM Stats Code Index (estimated from arena)26.07 scoremetric

Code Arena703.93 %coding · coding_arena_score

Context2,000,000 tokenscontext · context

Speed295.71 c/sperformance · throughput

Latency6,555.7 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 Reasoning 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.