Image model vs image model
FLUX.2 Klein 4B vs GPT Image 2.6 Sunburst
FLUX.2 Klein 4B ranks 45th of the 50 models we list with a text-to-image arena score; GPT Image 2.6 Sunburst hasn’t been rated yet. FLUX.2 Klein 4B costs 42× less ($0.005 against ≈$0.21 an image).
At a glance
Longer bar means the bigger number. Elo bars start at 800.
Price per image · 1024×1024, lower is better
Where they sit among all 59 image models
Up and to the left is better pictures for less money. Hover or tap a dot for its numbers, then click it to compare that model with FLUX.2 Klein 4B. Models the arena hasn’t rated yet sit in the grey lane at the bottom.
Which one to pick
Pick FLUX.2 Klein 4B if
- you want a model with a track record: it ranks 45th of the 50 models we list with a text-to-image arena score, and GPT Image 2.6 Sunburst has no arena score yet
- price matters: 100 images cost $0.50, against $21.05 with GPT Image 2.6 Sunburst
- you need to edit pictures you upload; GPT Image 2.6 Sunburst only makes new ones here
- you want open weights you can run yourself
The specs
| Spec | FLUX.2 Klein 4B | GPT Image 2.6 Sunburst |
|---|---|---|
| Price per image | $0.005 ($0.02 per edit) | ≈$0.21 (estimated, high quality) |
| 100 images | $0.50 | $21.05 |
| Text-to-image Elo | 839 ±12 (#96 in the arena) | Not scored yet |
| Editing Elo | 941 ±16 (#63 in the arena) | Not scored yet |
| Edits uploaded pictures | Yes | No |
| Largest size | — | — |
| Open weights | Yes | No |
| Zero data retention | — | No |
| Lab | Black Forest Labs | OpenAI |
| Official name | FLUX.2 [klein] 4B | GPT Image 2.6 Sunburst |
| Released | January 2026 | November 2026 |
Elo ± is the 95% margin. Prices are for one 1024×1024 image from the Vercel AI Gateway and fal.ai.
Questions
Which is better, FLUX.2 Klein 4B or GPT Image 2.6 Sunburst?
FLUX.2 Klein 4B ranks 45th of the 50 models we list with a text-to-image arena score; GPT Image 2.6 Sunburst hasn’t been rated yet. FLUX.2 Klein 4B costs 42× less ($0.005 against ≈$0.21 an image).
Which is cheaper, FLUX.2 Klein 4B or GPT Image 2.6 Sunburst?
FLUX.2 Klein 4B: $0.005 for a 1024×1024 image, against ≈$0.21 for GPT Image 2.6 Sunburst. 100 images cost $0.50 and $21.05. GPT Image 2.6 Sunburst is billed per token, so its price is an estimate at high quality.
Can FLUX.2 Klein 4B and GPT Image 2.6 Sunburst edit images?
FLUX.2 Klein 4B can change a picture you upload. GPT Image 2.6 Sunburst only makes new pictures from a prompt here.
How can I compare FLUX.2 Klein 4B and GPT Image 2.6 Sunburst myself?
Open the comparison, type one prompt and both models draw it side by side, each with what it cost and how long it took. You sign up with Google before your first run, and new accounts start with free credit.
Related comparisons
Where the numbers come from
Quality scores are Elo ratings from the Artificial Analysis image arenas, where people vote between two pictures made from the same prompt without knowing which model made which. The vote split comes from the Elo gap. Prices are for one 1024×1024 image from the Vercel AI Gateway and fal.ai; models billed per token are estimated at the quality the arena scored. The sample pictures are our own runs. Updated November 5, 2026.