Benchmark suiteUpdated May 27, 2026

GPT-5.1 Codex.

A model-level benchmark profile for GPT-5.1 Codex, combining Arena category ranks, suite indexes, commercial price and speed data, SWE-bench status, and lab context.

OpenAI lab page

Lab

OpenAI

Proprietary

Coverage

56%

5 of 9 tracked signals

Best Arena rank

#60

WebDev Arena

Best suite

#36

Value / 63

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

GPT-5.1 Codex is strongest on value.

56% coverage

Its best composite result is rank #36 in the value view, with a 63 value index. The strongest raw Arena signal is WebDev Arena at rank #60 with 6,216 public votes.

Best current lane

Value

#36 / 63 value index

Strongest raw signal

Code

#60, 1329 score

Commercial posture

$3.44

5.17s first token / 189 tok/s

Coverage gaps

Text ArenaVision ArenaSearch ArenaDocument Arena

Profile completeness

5 of 9 signals matched

56%

Arena categories

1/5

Code

Commercial match

Live

GPT-5.1 Codex (high)

SWE-bench

#20

bash-only

Raw identifier

gpt-5.1-codex

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

Not listed

No confident public Arena row for this category.

Coverage gap

WebDev Arena

Arena category

1,329#60

1320-1339 CI

6,216 votes

May 25, 2026

Arena public leaderboard dataset

Vision Arena

Arena category

Not listed

No confident public Arena row for this category.

Coverage gap

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

66%#20

bash-only

gpt-5.1-codex

Nov 24, 2025

SWE-bench Verified

Cost and speed

Commercial profile

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

Blended price

$3.44

USD / 1M tokens

Input price

$1.25

USD / 1M input tokens

Output price

$10.00

USD / 1M output tokens

Latency

5.17s

Median time to first token

Output speed

189 tok/s

Median generation speed

Matched source row

GPT-5.1 Codex (high)

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

#3663

value index

blended / 1M tokens$3.44

time to first token5.17s

output speed189 tok/s

Coding

Code Arena, SWE-bench, and output speed

#4158

coding index

Code Arena rank #601,329