Benchmark suiteUpdated May 19, 2026

Grok 4.1 Fast Reasoning.

A model-level benchmark profile for Grok 4.1 Fast Reasoning, combining Arena category ranks, suite indexes, commercial price and speed data, SWE-bench status, and lab context.

xAI lab page

Lab

xAI

Proprietary

Coverage

33%

3 of 9 tracked signals

Best Arena rank

#57

Vision Arena

Best suite

#71

Coding / 30

Model profile

Benchmark signal map.

This view treats missing values as coverage gaps, then puts every available score, rank, cost, and speed signal into the same visual hierarchy.

Analyst view

Grok 4.1 Fast Reasoning is strongest on coding.

33% coverage

Its best composite result is rank #71 in the coding view, with a 30 coding index. The strongest raw Arena signal is Vision Arena at rank #57 with 10,607 public votes.

Best current lane

Coding

#71 / 30 coding index

Strongest raw signal

Vision

#57, 1192 score

Commercial posture

Not listed

Not listed first token / Not listed

Coverage gaps

Search ArenaDocument ArenaBlended priceLatencyOutput speedSWE-bench

Profile completeness

3 of 9 signals matched

33%

Arena categories

3/5

Vision, Text, Code

Commercial match

Live

Grok 4.1 Fast (Reasoning)

SWE-bench

Not listed

No confident software benchmark row

Raw identifier

grok-4-1-fast-reasoning

Reasoning

Performance cockpit

Public benchmark scores

Arena rows show score, public rank, confidence interval, vote count, and publish date. Missing rows stay visible as coverage gaps.

Text Arena

Arena category

1,431#66

1428-1435 CI

52,836 votes

May 19, 2026

Arena public leaderboard dataset

WebDev Arena

Arena category

1,234#71

1224-1243 CI

6,910 votes

May 19, 2026

Arena public leaderboard dataset

Vision Arena

Arena category

1,192#57

1184-1199 CI

10,607 votes

May 18, 2026

Arena public leaderboard dataset

Search Arena

Arena category

Not listed

No confident public Arena row for this category.

Coverage gap

Document Arena

Arena category

Not listed

No confident public Arena row for this category.

Coverage gap

SWE-bench Verified

Software issue resolution

Not listed

No confident SWE-bench row matched to this model.

Coverage gap

Cost and speed

Commercial profile

Price, latency, and throughput are only shown when a confident commercial source row is matched.

Blended price

Not listed

USD / 1M tokens

Input price

Not listed

USD / 1M input tokens

Output price

Not listed

USD / 1M output tokens

Latency

Not listed

Median time to first token

Output speed

Not listed

Median generation speed

Matched source row

Grok 4.1 Fast (Reasoning)

Suite position

Composite ranks by benchmark lens.

These views combine available public signals into purpose-specific indexes. A missing card means the model lacks enough source coverage for that lens.

Value

Quality, price, latency, and output speed

Not listed

Not enough matched source rows for this composite view.

Coding

Code Arena, SWE-bench, and output speed

#7130

coding index

Code Arena rank #711,234

No confident matchNot listed

output speedNot listed

Agents