MEASURED 2026-07-21 · 3 MODEL API TEST

AI Architecture Rendering Model Comparison

A blue-hour coastal house prompt tests architectural realism, materials, atmosphere, latency, and cost across three image generation models.

One API gateway for multiple AI models.

APIMart is a multi-model AI API gateway with an OpenAI-compatible endpoint. Use one account to access supported image models, compare current pricing, and choose a cost-efficient option for each workload.

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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 architecture rendering model comparison

GPT Image 2

Latency
159.0 s
Reported cost
$0.0085
Attempts
1
Requested size
1024x1024
Flux 2 Flex output for AI architecture rendering model comparison

Flux 2 Flex

Latency
43.0 s
Reported cost
$0.0700
Attempts
1
Requested size
1024x1024
Gemini 2.5 Flash output for AI architecture rendering model comparison

Gemini 2.5 Flash

Latency
32.0 s
Reported cost
$0.0125
Attempts
1
Requested size
1024x1024
SHARED PROMPT · coastal-house-dusk · 16:9

Reproduce the request.

Low modern coastal house at blue hour, weathered cedar and board-formed concrete, dune grasses moving in sea wind, warm interior light, realistic architectural photography, human-scale lens.
OBSERVED FINDING

All three produced convincing architecture. Gemini completed in 32 seconds, while GPT delivered richer detail but required 159 seconds for this fixture.

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.