Premium text-to-image API for repeatable product, campaign, and design assets when a standard draft needs a selected model tier. Send a prompt with optional dimensions, tier, and seed; receive a hosted PNG URL plus the resolved model, final canvas, prompt, seed, and timing. Keep the tier, dimensions, and seed fixed to rerun an approved asset. Tiers: 'balanced' (flux-2-pro, default), 'recraft' (recraft-v4), 'seedream' (seedream-v4), 'grok' (grok-imagine-image), and 'qwen' (qwen-image). Use it for Flux 2 Pro, Recraft, Seedream, Qwen Image, or Grok Imagine image generation.