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A · closed · GPT-4 / o-series

GPT-4.1 Nano

OpenAI

B · closed · GPT-4 / o-series

o3

OpenAI

1:15

overall capability wins (0 ties across 16 scored). o3 leads overall.

  • Reasoning0:9
  • Coding0:4
  • Arena0:1
  • Pricing3:0
  • Speed2:0
  • Specs1:1

Verdict

o3 leads coding (widest gap: +72.4 on Aider); o3 ranks higher on LMArena (+109 Elo); GPT-4.1 Nano offers ~5.0x larger context (1M vs 200K).

  • o3 leads coding (widest gap: +72.4 on Aider)
  • o3 ranks higher on LMArena (+109 Elo)
  • GPT-4.1 Nano offers ~5.0x larger context (1M vs 200K)
  • o3 allows ~3.1x more max output (100K vs 33K)
  • GPT-4.1 Nano is ~20.0x cheaper on a blended token basis than o3

Cost for 1M in + 250K out

Illustrative chat workload at primary-provider list prices.

GPT-4.1 Nano
$0.20
o3
$4

GPT-4.1 Nano is about 20.0x cheaper on this workload.

Price per 1M tokens

Full comparison

Organization

OpenAI

OpenAI

Family

GPT-4 / o-series

GPT-4 / o-series

License

Proprietary

Proprietary

Open weights

No

No

Release

Apr 14, 2025

Apr 16, 2025

Knowledge cutoff

-

-

API / provider

OpenAI

OpenAI

Modalities

text, image → text

text, image → text

Specs

Context window

1M

200K

A +800K

Max output

33K

100K

B +67K

Parameters

—

—

—

Pricing

Input $/1M

$0.10

$2

A +$1.90

Output $/1M

$0.40

$8

A +$7.60

Blended $/1M (3∶1)

$0.18

$3.50

A +$3.33

Speed

tok/s

160

55

A +105

TTFT (s)

0.18

1.2

A +1.02

Reasoning

MMLU-Pro

65.7

85.3

B +19.6 pts

GPQA Diamond

51.2

82.7

B +31.5 pts

Humanity's Last Exam

3.8

20.1

B +16.3 pts

AIME 2025

24.0

88.9

B +64.9 pts

MATH-500

84.8

99.2

B +14.4 pts

Humanity's Last Exam (with tools)

—

—

—

AA-Omniscience Accuracy

13.7

38.6

B +24.9 pts

AA-LCR v1.1

20.3

74.7

B +54.4 pts

CritPt

—

1.1

—

MMMU-Pro

40.1

70.1

B +30.0 pts

IFBench

32.0

71.4

B +39.4 pts

Chartography

—

—

—

Chartography (With Tools)

—

—

—

Coding

SWE-bench Verified

—

58.4

—

SWE-bench Pro

—

—

—

SWE-bench Multilingual

—

—

—

LiveCodeBench

32.6

80.8

B +48.2 pts

Terminal-Bench 2.1

3.7

—

—

Aider Polyglot

8.9

81.3

B +72.4 pts

Terminal-Bench 3

—

—

—

BigCodeBench

—

—

—

SciCode

25.9

41.0

B +15.1 pts

CursorBench

—

—

—

SWE-Rebench

0.3

38.1

B +37.8 pts

NL2Repo-Bench

—

—

—

DeepSWE

—

—

—

WebDev Arena

—

—

—

Terminal-Bench 4.0

—

—

—

CursorBench 4.0

—

—

—

FrontierCode v1.1 (Main)

—

—

—

Arena

LMArena Elo

1,322

1,432

B +109 Elo

GPT-4.1 Nano

Context
1M / 33K out
Parameters
—
Price
$0.10 / $0.40
Speed
160 tok/s · 0.18s TTFT
Modalities
text, image → text
License
Proprietary

Cheapest GPT-4.1 tier for classification, routing, and high-volume extraction with a full 1M context window.

o3

Context
200K / 100K out
Parameters
—
Price
$2 / $8
Speed
55 tok/s · 1.2s TTFT
Modalities
text, image → text
License
Proprietary

OpenAI reasoning model from the o-series; strong on STEM and agentic coding with deliberate chain-of-thought.

Benchmark charts

Winner bars are emphasized. Per-benchmark deltas sit above each chart.

Reasoning & knowledge

MMLU-Pro: B +19.6GPQA: B +31.5HLE: B +16.3AIME: B +64.9MATH-500: B +14.4AA-LCR: B +54.4Omniscience Acc.: B +24.9MMMU-Pro: B +30.0IFBench: B +39.4

Coding

LiveCode: B +48.2Aider: B +72.4SciCode: B +15.1SWE-Rebench: B +37.8

Arena

Arena Elo: B +109

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