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GPT-5.1vsGPT-5

Across 13 shared benchmarks, GPT-5.1 leads overall: GPT-5.1 wins 7, GPT-5 wins 5, with 1 ties and an average score difference of +1.12.

OpenAI
GPT-5.1

OpenAI · 2025-11-12 · Reasoning model

OpenAI
GPT-5

OpenAI · 2025-08-07 · Foundation model

GPT-5.17 wins(54%)Ties1(38%)5 winsGPT-5

Benchmark scores

Grouped by capability, sorted by largest gap within each. 13 shared benchmarks.

General Knowledge

GPT-5.1 3/4
BenchmarkGPT-5.1GPT-5Diff
HLE26.5097 / 17235.2073 / 172-8.70
ARC-AGI-217.6036 / 629.9040 / 62+7.70
ARC-AGI72.8028 / 6865.7033 / 68+7.10
GPQA Diamond88.1031 / 18787.3040 / 187+0.80

Math and Reasoning

Even 3/3
BenchmarkGPT-5.1GPT-5Diff
AIME20259428 / 10799.609 / 107-5.60
FrontierMath26.7013 / 60Thinking High (With Tools)24.8015 / 60+1.90
FrontierMath - Tier 412.5029 / 80Thinking High (With Tools)12.5029 / 80Thinking High (No Tools)

Coding and Software Engineer

GPT-5.1 2/2
BenchmarkGPT-5.1GPT-5Diff
SWE-Bench Pro - Public50.8040 / 54Thinking High (No Tools)36.3052 / 54+14.50
SWE-bench Verified76.3034 / 11272.8050 / 112+3.50

Agent Level Benchmark

GPT-5 1/1
BenchmarkGPT-5.1GPT-5Diff
τ²-Bench - Telecom95.6014 / 35Thinking High (With Tools)95.8013 / 35-0.20

AI Agent - Information Search

GPT-5 1/1
BenchmarkGPT-5.1GPT-5Diff
BrowseComp50.8043 / 53Thinking High (No Tools)54.9039 / 53-4.10

Commonsense Reasoning

GPT-5 1/1
BenchmarkGPT-5.1GPT-5Diff
Simple Bench53.2023 / 63Thinking High (No Tools)56.7020 / 63Thinking High (No Tools)-3.50

Multimodal Understanding

GPT-5.1 1/1
BenchmarkGPT-5.1GPT-5Diff
MMMU85.402 / 2984.206 / 29+1.20

Specs

FieldGPT-5.1GPT-5
PublisherOpenAIOpenAI
Release date2025-11-122025-08-07
Model typeReasoning modelFoundation model
ArchitectureDenseDense
ParametersNot availableNot available
Context length400K400K
Max output128K128K

API pricing

Prices use DataLearner records when available; missing fields are not inferred.

ItemGPT-5.1GPT-5
Text input$1.25 / 1M tokens$1.25 / 1M tokens
Text output$10 / 1M tokens$10 / 1M tokens
Cache read$0.125 / 1M tokens$0.125 / 1M tokens
Cache write$0 / 1M tokens$0 / 1M tokens

Summary

  • GPT-5.1leads in:General Knowledge (3/4), Coding and Software Engineer (2/2), Multimodal Understanding (1/1)
  • GPT-5leads in:Agent Level Benchmark (1/1), AI Agent - Information Search (1/1), Commonsense Reasoning (1/1)
  • Tied in:Math and Reasoning

On average across the 13 shared benchmarks, GPT-5.1 scores 1.12 higher.

Largest single-benchmark gap: SWE-Bench Pro - Public — GPT-5.1 50.80 vs GPT-5 36.30 (+14.50).

Page generated from structured model, pricing and benchmark records. No real-time LLM is used to write the prose.