FLUX-Reason-6M & PRISM-Bench: A Million-Scale Text-to-Image Reasoning Dataset and Comprehensive Benchmark

The advancement of open-source text-to-image (T2I) models has been hindered by the absence of large-scale, reasoning-focused datasets and comprehensive evaluation benchmarks, resulting in a performance gap compared to leading closed-source systems. To address this challenge, We introduce FLUX-Reason-6M and PRISM-Bench (Precise and Robust Image Synthesis Measurement Benchmark). FLUX-Reason-6M is a massive dataset consisting of 6 million high-quality FLUX-generated images and 20 million bilingual (English and Chinese) descriptions specifically designed to teach complex reasoning. The image are organized according to six key characteristics: Imagination, Entity, Text rendering, Style, Affection, and Composition, and design explicit Generation Chain-of-Thought (GCoT) to provide detailed breakdowns of image generation steps. The whole data curation takes 15,000 A100 GPU days, providing the community with a resource previously unattainable outside of large industrial labs. PRISM-Bench offers a novel evaluation standard with seven distinct tracks, including a formidable Long Text challenge using GCoT. Through carefully designed prompts, it utilizes advanced visionlanguage models for nuanced human-aligned assessment of prompt-image alignment and image aesthetics. Our extensive evaluation of 19 leading models on PRISM-Bench reveals critical performance gaps and highlights specific areas requiring improvement. Our dataset, benchmark, and evaluation code are released to catalyze the next wave of reasoning-oriented T2I generation. Composition: Cute Morkie puppy perched inside a pink box labeled "Fabulous". Adorned with a matching pink bow and surrounded by fluffy feathers and vibrant pink flowers, the puppy exudes charm and playfulness. Affection: Enveloped in a world of soft textures and vibrant hues, this Morkie puppy embodies the essence of innocence and wonder, radiating an irresistible charm that ignites a heartwarming sense of joy and hope. GCoT: Cute and charming, a Morkie puppy sits adorably perched inside a pastel pink cardboard box labeled "Fabulous" in bold black script. The puppy, with its fluffy white fur accented by brown patches around its ears and face, exudes an irresistible charm, enhanced by a matching pink satin bow tied neatly atop its head. Its small paws, tipped with dark pads, rest gently on the edge of the box, adding a playful touch to the composition. Surrounding the puppy are fluffy white feathers and vibrant pink flowers, creating a whimsical and enchanting atmosphere. The background is a soft, uniform pink, which complements the overall color scheme and draws attention to the central subject. The image captures a perfect blend of innocence and playfulness, evoking a heartwarming sense of joy and hope through its soft textures, vibrant hues, and meticulous arrangement.