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Grok 4 Fast

grok family · launched 2025-12-18

MultimodalTools
AITopic score42.3Not yet ranked

Fast Grok model for responsive chat, reasoning, and tool-assisted work

Evidence coverage5%1 evaluations · 1 institutions
Context / maximum output2M / 2Mtokens
Cache / input / output$0.2 · $1.25 · $2.5USD per million tokens
Value / freshness39.8 / 50relative value · release freshness
Product profile

What this model supports

Inputtext, image, audio, video
Outputtext
Knowledge cutoff2025-09
WeightsProprietary / hosted
Capability profile

Strengths by domain

Coding—0 public results
Research & reasoning—0 public results
Professional work—0 public results
Knowledge & instruction—0 public results
Behind the score

Every result has a source

Raw results and standardized readings are shown together. Missing tests add neither points nor penalties.

Human preference & indices2 results

AA IndexArtificial Analysis59.71 indexReading 42.3

Imported from Artificial Analysis. The published 0–100 score is used directly; it is not z-score normalized.

Configuration: Grok 4 FastOpen evidence
Arena TextLMArena1,399.6 EloReading 42.3

Direct LMArena text leaderboard result.

Open evidence
Same builder

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