Benchmark suiteLatest source data: Oct 13, 2026Checked: October 15, 2026

Grok 4.20 Beta 0309 Reasoning.

A model-level benchmark profile for Grok 4.20 Beta 0309 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

#35

Document Arena

Best suite

#49

Reasoning / 44

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 4.20 Beta 0309 Reasoning is strongest on reasoning.

33% coverage

Its best composite result is rank #49 in the reasoning view, with a 44 reasoning proxy. The strongest raw Arena signal is Document Arena at rank #35 with 20,948 public votes.

Best current lane

Reasoning

#49 / 44 reasoning proxy

Strongest raw signal

Docs

#35, 1439 score

Commercial posture

No price match

Artificial Analysis row not matched

Coverage gaps

WebDev ArenaSearch ArenaBlended priceLatencyOutput speedSWE-bench

Profile completeness

3 of 9 signals matched

33%

Arena categories

3/5

Docs, Text, Vision

Commercial match

Missing

No Artificial Analysis match

SWE-bench

Not listed

No confident software benchmark row

Raw identifier

grok-4.20-beta-0309-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

1,472#46

1468-1475 CI

66,463 votes

Oct 13, 2026

Arena public leaderboard dataset

WebDev Arena

Arena category

Not listed

No confident public Arena row for this category.

Coverage gap

Vision Arena

Arena category

1,256#50

1249-1262 CI

26,828 votes

Oct 9, 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

1,439#35

1432-1447 CI

20,948 votes

Sep 13, 2026

Arena public leaderboard dataset

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

Not listed

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

Not listed

Not enough matched source rows for this composite view.

Agents

Search, documents, code, and latency

#10039

agent proxy