OpenAI: GPT-5 Image

fileimagetext imagetext 400K context

1 provider
2 test samples

What we tested, and what came back

Each capability below is a fixed experiment: the same prompt and the same input images for every model we test. That's what makes these outputs comparable — and it's why the same bicycle shows up on every image model's page.

Each of these is a fixed experiment — the same prompt and the same input images for every model we test, so the outputs are directly comparable.

Renders a data-faithful infographic ✓ passed
We asked

“Create a clean infographic: a vertical bar chart titled 'HIFIBOTS USERS' with exactly three labeled bars: Jan = 10, Feb = 25, Mar = 40. Show each label and value as legible text.”

We gave it

Nothing — prompt only

It returned
a vision model was asked a yes/no question about the output 48s $0.20619 provider_reported
Replaces a target object in place (prompt-based inpainting) ✓ passed
We asked

“In this image, replace the red square with a yellow star. Keep the blue circle exactly as it is.”

We gave it 1 reference image
Input fixture shapes.png
shapes.png
It returned
a vision model was asked a yes/no question about the output 32s $0.18487 provider_reported
Stated by the provider — not tested by us
✓ also understands images✓ multi reference✓ reference image✓ style transfer✓ text in image✓ text to image✓ transparency✗ aspect ratio control✗ background removal✗ upscaling
Specs
aspect ratios
1024x1024, 1024x1536, 1536x1024
max resolution
1536x1024 (largest documented for underlying gpt-image-1; no size param on OpenRouter surface)
watermark
C2PA metadata + SynthID documented by OpenAI for generated images (help.openai.com 8912793); not stated on OpenRouter page
price per image
Per token via OpenRouter: $10/1M in, $10/1M out; image $40/1M image tokens; all-or-nothing billing per generation
speed tier
medium
latency t2i s
52.8
latency i2i s
38.2
latency s
47.55820631980896

Sources: openrouter.ai · openrouter.ai · openrouter.ai · developers.openai.com

Where to run it

The same model, priced by each provider that serves it. Cheapest first — the card's headline price is the best available anywhere, which is the wrong number for choosing where to actually send your traffic.

ProviderPriceContext
openrouter $10 / $10 per 1M400KGet a key ↗
See all openai models we've tested →

How we test

Every claim is tagged by how we know it. Tested means we ran the model against a fixed prompt and checked the output — the images above are those runs. Researched means it's documented by the provider and cited. Nothing here is inferred.