MEASURED 2026-07-21 · 3 MODEL API TEST

AI Billboard Image Generation Comparison

A minimal citrus beverage billboard fixture tested across three image APIs with raw outputs, prompt adherence notes, reported cost, and latency.

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THREE RAW OUTPUTS

Same fixture.
Measured API result.

One accepted output per model. Cost and latency are copied from the stored run records; this dated snapshot is not a universal ranking.

GPT Image 2 output for AI billboard image generation comparison

GPT Image 2

Latency
56.0 s
Reported cost
$0.0085
Attempts
1
Requested size
1024x1024
Flux 2 Flex output for AI billboard image generation comparison

Flux 2 Flex

Latency
32.0 s
Reported cost
$0.0700
Attempts
1
Requested size
1024x1024
Gemini 2.5 Flash output for AI billboard image generation comparison

Gemini 2.5 Flash

Latency
33.0 s
Reported cost
$0.0125
Attempts
1
Requested size
1024x1024
SHARED PROMPT · citrus-billboard · 3:2

Reproduce the request.

Cold citrus sparkling water can with realistic condensation, bright cobalt sky, sharp noon shadow, sliced yuzu suspended around the can, bold minimal billboard composition, no invented lettering.
OBSERVED FINDING

GPT most closely matched the minimal no-lettering direction. Flux invented label marks, while Gemini drifted toward a literal outdoor billboard scene.

Test date: 2026-07-21. The report uses one accepted output from each API and preserves the original images and JSON run records in GitHub. Availability, behavior, and pricing can change.