Compare FLUX 2 Flex by Black Forest Labs against GPT Image 1.5 by OpenAI, in 1 community votes, flux 2 flex and gpt image 1.5 are closely matched, tested across 17 shared challenges. Updated February 2026.
In 1 community votes, FLUX 2 Flex and GPT Image 1.5 are closely matched. Based on blind community voting from the RIVAL open dataset of 1+ human preference judgments for this pair.
17 challenges
Tests an AI's ability to generate a photorealistic human portrait
Tests an AI's ability to create detailed architectural visualizations
Tests an AI's capability to design fantasy characters with specific details
Tests an AI's ability to create a marketing-ready product image
Tests an AI's ability to generate a stylized illustration
Tests an AI's ability to create convincing mixed-media collages and product presentation
Tests an AI's ability to render technical drawings with clean linework, scale, and legible annotations
Tests an AI's ability to create a clear, diagrammatic scientific illustration with explanatory structure
Tests spatial reasoning, perspective consistency, and detailed environment rendering
Tests branding, packaging design, and photoreal retail context rendering
Tests fine detail, consistent linework, and vintage scientific illustration style
Tests graphic design, layout, and typography accuracy in a schematic map
