FLUX 3 Image vs GPT Image 2.5 Sunburst
Newest: FLUX 3 Image · Self-hosting: No open weights · Most API hosts: GPT Image 2.5 Sunburst. Not enough arena votes yet for a quality score, so this is a spec comparison.
Black Forest LabsFLUX 3 Image
- Arena—
- From—
- Max size—
OpenAIGPT Image 2.5 Sunburst
- Arena1,517
- From—
- Max size—
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Where they differ
Quality is the arena score from blind, side-by-side human votes. Price, length and resolution come from each lab’s own listings.
- NewestFLUX 3 ImageFLUX 3 Image Oct 5, 2026 · GPT Image 2.5 Sunburst Sep 8, 2026
- Widest inputsSame inputsFLUX 3 Image: Text prompts, Reference images · GPT Image 2.5 Sunburst: Text prompts, Reference images
- Image editingBoth edit imagesTakes a reference image as input: FLUX 3 Image yes · GPT Image 2.5 Sunburst yes
- Self-hostingNo open weightsBoth are available only through APIs and apps
- Most API hostsGPT Image 2.5 SunburstFLUX 3 Image: 1 · GPT Image 2.5 Sunburst: 4
Every spec in one table
Dashes mean the data is not published.
| Specification | FLUX 3 ImageBlack Forest Labs | GPT Image 2.5 SunburstOpenAI |
|---|---|---|
| Quality (blind human votes) | ||
| Text to image arenaElo-style score · higher is better | — | 1,427 ±5#1 of 82 · 40,323 votes |
| Image editing arenaElo-style score · higher is better | — | 1,517 ±5#1 of 61 · 90,545 votes |
| Price | ||
| How it is billed | — | Billed per token: $30 per million output image tokens. |
| Output | ||
| Produces | Images | Images |
| Images per request | — | Up to 10 |
| Inputs | ||
| Text prompts | Yes | Yes |
| Reference images (editing) | Yes | Yes |
| Max reference images | — | 16 |
| Access | ||
| Weights | Proprietary | Proprietary |
| API hosts | 1 | 4 (best) |
| Released | Oct 5, 2026 | Sep 8, 2026 |
Which should you choose?
Which is better, FLUX 3 Image or GPT Image 2.5 Sunburst?
Neither model has enough arena votes for a reliable quality score yet, so this page compares specs only. Run the same three or four prompts through each and judge the results.
What is the difference between FLUX 3 Image and GPT Image 2.5 Sunburst?
FLUX 3 Image is an image model from Black Forest Labs (Oct 5, 2026), taking text prompts and reference images and producing images. GPT Image 2.5 Sunburst is an image model from OpenAI (Sep 8, 2026), taking text prompts and reference images and producing images.
Which is newer?
FLUX 3 Image Oct 5, 2026; GPT Image 2.5 Sunburst Sep 8, 2026.
Which can edit an existing image?
Takes a reference image as input: FLUX 3 Image yes; GPT Image 2.5 Sunburst yes.
Can I run any of these on my own hardware?
No open weights. Both are available only through APIs and apps.
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