GPT-5.4 Nano

OpenAI

budget

Capabilities

VisionToolsStructured Output

Strengths

Extremely cheap
Very fast
Good for classification and extraction

Weaknesses

Weakest reasoning
Not for complex or creative tasks

Pricing

Input / 1M tokens

$0.2

Output / 1M tokens

$1.25

Context window

400k

Transparency

Open weights

0.0 / 10

Open training data

0.0 / 10

Open methodology

3.0 / 10

Licence openness

3.0 / 10

Provider disclosure

4.0 / 10

FMTI company score

350.0 / 10

Composite:2.0 / 10

Smallest OpenAI model. Less documented than flagship.

Sustainability

Inference energy

8.0 / 10

Training footprint

N/A

Provider infrastructure

4.0 / 10

Composite:6.0 / 10

Smallest OpenAI model = most efficient inference. CEO stated 0.34 Wh per average ChatGPT query. Claims 100% renewable by 2027 via Microsoft Azure RECs (not direct PPAs). Zero published Scope 1/2/3 emissions as of 2026.

Task Fitness

question answering

57%

code

60%

mathematics

57%

business communication

47%

analysis

55%

extraction

78%

long-form generation

55%

research

39%

reasoning

55%

summarisation

70%

translation

65%

conversation

60%