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Model compare

GPT-5.1 vs GPT-5 Mini

The readout for GPT-5.1 and GPT-5 Mini, before the detailed comparison sheet.

Model A

GPT-5.1

OpenAI

Leading
vs

Model B

GPT-5 Mini

OpenAI

Contender

Key Takeaways

Weighted outcome: GPT-5.1. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.

Decision read

GPT-5.1

GPT-5.1 has the higher weighted result; Model A / B score 96 to 4.

Evidence depth

81 data points

Includes 8 benchmark rows, 0 audit samples, and 9 provider examples.

Selection signal

Start with GPT-5.1

The charts below split 17 high-signal samples across speed, scores, and audit health.

Change comparison

Switch either side of this report to compare another model with the same LMSpeed data pipeline.

Select a different model to open a new comparison URL.

Comparison sheet

This report only uses LMSpeed data for GPT-5.1 and GPT-5 Mini: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.

Model compare
GPT-5.1
GPT-5 Mini
Overall leaderLeadingContender
Weighted overall score96.0 pts4.0 pts
Benchmark category leads3 categories0 categories
Operational advantagesAverage speed, First-token latency, Free providers, Provider coverageCheapest input price
Context window400K tokens400K tokens
Max output128K tokens128K tokens
Modalities

Input

ImageTextFile

Output

Text

Input

TextImageFile

Output

Text
Features
Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning
Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning

The overall result weights benchmark capability categories at 80% and price, API speed/latency, and availability at 20%. Recent test volume does not affect the winner, and missing benchmark categories are excluded.

Model metadata

Model compare
GPT-5.1
GPT-5 Mini
DeveloperOpenAIOpenAI
ReleasedNov 2025Aug 2025
ParametersNo dataNo data
TokenizerGPTGPT
Knowledge cutoffNo data2024-05-31
OpenRouter IDopenai/gpt-5.1openai/gpt-5-mini
ReferencesNo dataNo data

When to choose each model

This report only uses LMSpeed data for GPT-5.1 and GPT-5 Mini: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.

GPT-5.1

GPT-5.1 is stronger in benchmark categories (Coding, Reasoning, Math) and operational dimensions (Average speed, First-token latency, Free providers, Provider coverage).

GPT-5 Mini

GPT-5 Mini has these operational advantages: Cheapest input price.

Benchmark score comparison

Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.

Category performance

Compare benchmark category scores on a 0-100 scale. Select a category to inspect the gap.

Model A coverage
7 / 8
Model B coverage
3 / 8
Shared
3 shared categories

Avg. score

GPT-5.1

51.2

Avg. score

GPT-5 Mini

51.5

Agents

GPT-5.1

GPT-5.147.6
GPT-5 Mini-

Coding

GPT-5.1 leads by 0.6

GPT-5.149.5
GPT-5 Mini48.9

Reasoning

GPT-5.1 leads by 0.4

GPT-5.153.8
GPT-5 Mini53.4

Knowledge

GPT-5.1

GPT-5.151.7
GPT-5 Mini-

Math

GPT-5.1 leads by 1.2

GPT-5.153.4
GPT-5 Mini52.2

Multilingual

No data

GPT-5.1-
GPT-5 Mini-

Multimodal

GPT-5.1

GPT-5.148.8
GPT-5 Mini-

Instruction following

GPT-5.1

GPT-5.153.5
GPT-5 Mini-

Professional benchmark details

Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.

Pricingverified

Input price

SourceGPT-5.1 (high)

GPT-5.1

$1.25/M

Rank #122/185 · confidence 4

+$1.00/M

GPT-5 Mini

winner

$0.250/M

Rank #44/185 · confidence 4

Pricingverified

Blended price

SourceGPT-5.1 (high)

GPT-5.1

$3.44/M

Rank #138/185 · confidence 4

+$2.75/M

GPT-5 Mini

winner

$0.688/M

Rank #63/185 · confidence 4

Pricingverified

Output price

SourceGPT-5.1 (high)

GPT-5.1

$10.00/M

Rank #141/185 · confidence 4

+$8.00/M

GPT-5 Mini

winner

$2.00/M

Rank #71/185 · confidence 4

Reasoningverified

MMLU-Pro

SourceGPT-5.1 (Non-reasoning)

GPT-5.1

80.1%

Rank #62/129 · confidence 4

+2.7%

GPT-5 Mini

winner

82.8%

Rank #45/129 · confidence 4

Reasoningverified

GPQA

SourceGPT-5.1 (high)

GPT-5.1

winner

87.3%

Rank #52/217 · confidence 4

+4.5%

GPT-5 Mini

82.8%

Rank #81/217 · confidence 4

Reasoningverified

HLE

SourceGPT-5.1 (high)

GPT-5.1

winner

28.5%

Rank #60/214 · confidence 4

+7.0%

GPT-5 Mini

21.5%

Rank #80/214 · confidence 4

Codingverified

LiveCodeBench

SourceGPT-5.1 (high)

GPT-5.1

winner

86.8%

Rank #4/115 · confidence 4

+3.0%

GPT-5 Mini

83.8%

Rank #12/115 · confidence 4

Codingreported

Vibe Code Bench

SourceGPT-5.1

GPT-5.1

winner

24.6

Rank #18/33 · confidence 3 · eval date 2025-11-13

+10.4

GPT-5 Mini

14.2

Rank #27/33 · confidence 1 · eval date 2025-08-07

API audit comparison

Latest completed audits from shared providers, with four safety and integrity score groups plus report links.

Provider
GPT-5.1
GPT-5 Mini
No completed audits are available from shared providers yet.

Provider examples

Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.

Provider
GPT-5.1
GPT-5 Mini
BUZZ10 tests

GPT-5.1

speed / latency

137 tok/s / 3299ms

input / output

No data

GPT-5 Mini

speed / latency

N/A / N/A

input / output

No data

V-API10 tests

GPT-5.1

speed / latency

N/A / N/A

input / output

No data

GPT-5 Mini

speed / latency

76 tok/s / 6393ms

input / output

No data

N1N5 tests

GPT-5.1

speed / latency

96 tok/s / 1862ms

input / output

No data

GPT-5 Mini

speed / latency

N/A / N/A

input / output

No data

YUNWU API5 tests

GPT-5.1

gpt-5.1-chat-latest

speed / latency

N/A / N/A

input / output

$0.030/M/$0.240/M

GPT-5 Mini

gpt-5-mini-2025-08-07

speed / latency

83 tok/s / 6571ms

input / output

$0.0060/M/$0.048/M

小水管 API5 tests

GPT-5.1

speed / latency

N/A / N/A

input / output

No data

GPT-5 Mini

speed / latency

94 tok/s / 6360ms

input / output

No data

兔子API

GPT-5.1

gpt-5.1-chat-latest

speed / latency

No data

input / output

$0/request

GPT-5 Mini

gpt-5-mini

speed / latency

No data

input / output

$0/request

初叶🍂Furry API

GPT-5.1

gpt-5-1

speed / latency

No data

input / output

$0/request

GPT-5 Mini

gpt-5-mini

speed / latency

No data

input / output

$0/request

Yun API

GPT-5.1

gpt-5.1

speed / latency

No data

input / output

$0.0027/request

GPT-5 Mini

gpt-5-mini

speed / latency

No data

input / output

$0.034/M/$0.274/M

Zhongzhuan Chat

GPT-5.1

gpt-5.1

speed / latency

No data

input / output

$0.030/M/$0.240/M

GPT-5 Mini

gpt-5-mini

speed / latency

No data

input / output

$0.0060/M/$0.048/M

FAQ

Weighted outcome: GPT-5.1. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.

Why is this comparison indexable?
It has 6 verifiable comparison points, and both models have pricing or benchmark data.
Are missing metrics invented?
No. Metrics without LMSpeed data are omitted from this report.

Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.