Row-Bot 上 Flare vs Sunburst：放大镜硬对比

Prompt

GPT-Image-2.5 - Flare vs Sunburst

Wanted to test GPT Image 2.5 in Row-Bot. Noticed that it exposes 2 variants - Sunburst & Flare. So it became a comparison.

I gave Row-Bot this prompt: "what is the difference between gpt image 2.5 sunburst and flare? i want you to generate the same image using both models one by one and then compare the results. try a complex prompt that really works the image gen model."

Raw Output:

"Done, sir. Both images are generated and I've examined them closely. Here's the honest verdict.

What the two models actually are
GPT-Image-2.5 — Flare vs Sunburst - Flare: the speed-optimised variant — ~50% lower latency than GPT-Image-2 (measured ~19.7s vs ~37.3s), designed for high-volume, rapid-iteration work. Higher quality than the older 2.0, but trades off some fidelity for throughput. - 

Sunburst: the precision variant — OpenAI's "most capable" image model. Sharper detail rendering, more natural lighting, richer textures, and the tightest control for complex/precise generations, at the cost of longer generation time.

Both support transparent backgrounds and up to 4K output, and both are available in your setup.

The comparison (honestly — they're closer than I expected)

Both nailed the easy stuff: candlelight mood, warm amber/teal grading, the wood and brass texture, and a smooth, believable depth-of-field falloff. At a glance both read as a high-end render.

Where they diverge on the hard stuff:

The loupe (the real discriminator): Flare actually rendered a magnified, refracted view through the glass — the more physically sensible choice — though the magnified candle didn't line up with the real one and it reads slightly "pasted in." Sunburst rendered the glass as a flat mirror with no lens distortion or magnification. On this specific element, Flare got the concept closer.

Gear micro-mechanics: Both failed in the same way — fused/uneven teeth, non-meshing gear trains, and machining marks that look like a generic texture wash rather than true hairline finishing. Neither delivered the "tack-sharp escapement" the prompt asked for.

Nonsensical parts: Both produced a floating knurled crown and mangled engraved text. Flare added a strange "banana-shaped" brass fragment with random jewel holes; Sunburst had a floating detached screw.

Bottom line
On this particular complex prompt, the difference was subtle, not dramatic — which is itself a useful finding: both 2.5 variants are far ahead of the older 2.0 on mood, lighting, and composition, and both share the same core weakness (true micro-mechanical and lens-optics accuracy). If I had to pick on this image:

Flare gave a marginally more physically-coherent loupe and I'd take it for iteration speed and most everyday generations.

Sunburst is where you'd go if detail consistency and editing control matter most — the gap is expected to widen more on editing/multi-turn work than on single-shot generation like this."

Attribution

Author

sydsachar

Published

2026-09-16

Original post

View original ↗

Collected from

xianyu110/awesome-gpt-image2.5 · 2100216986538029207 · MIT