--- title: "FLUX 3 Image Klein Benchmark Results" description: "The small open-weights member of the FLUX 3 family, released October 2026, with native output up to 4K." url: "https://img.ly/ai-benchmarks/models/flux-3-klein/" type: "benchmark-model" provider: "Black Forest Labs" tier: "budget" costPerImageUsd: 0.009 --- > This is the markdown version of [FLUX 3 Image Klein Benchmark Results](https://img.ly/ai-benchmarks/models/flux-3-klein/). For all pages in one file, see [llms-full.txt](https://img.ly/llms-full.txt). For an index of all available pages, see [llms.txt](https://img.ly/llms.txt). --- # FLUX 3 Image Klein The small open-weights member of the FLUX 3 family, released October 2026, with native output up to 4K. FLUX 3 Image Klein is the small open-weights member of the FLUX 3 family and the strongest model added in October. It lands fifth of 26 on the blended ranking at 3.57, ahead of every FLUX.2 variant, at $0.009 per image and a 2.2 second median, which makes it the third cheapest and the fourth fastest model measured. It renders every required string exactly for a clean 5.00 on text, and it builds a better file than FLUX.2 Turbo, 3.13 against 2.98. The weak spots are composition at 3.67 and brand color at 2.56, both in the bottom third of the field, and like the other October additions it returns no alpha channel. The weights are published under the FLUX Kommunity License, free for commercial use below $5M in annual revenue, which makes it one of the few models in this benchmark a privacy-constrained printer can host itself. ## Why it stands out - Fifth of 26 on the blended ranking at 3.57, ahead of every FLUX.2 variant. - $0.009 per image and a 2.2 second median, the third cheapest and fourth fastest model measured. - A clean 5.00 on text, held back by composition at 3.67 and brand color at 2.56. - Open weights under the FLUX Kommunity License, free for commercial use below $5M annual revenue. - Provider: Black Forest Labs - Tier: budget - Benchmarked endpoint: fal:blackforestlabs/flux-3/klein/text-to-image - Available on the IMG.LY AI Gateway: no - Cost per image: $0.009 - p50 latency: 2.2s - Images benchmarked: 111 - Licensing: Open weights (5.6B parameters) under the FLUX Kommunity License: free commercial use below $5M annual revenue, larger companies license via self-hosting terms or the API. ## Scores by criterion (auto tier) - Transparency: 0.0 / 5 (9 scores across 9 runs) - Color Accuracy: 2.6 / 5 (9 scores across 9 runs) - Composition: 3.7 / 5 (9 scores across 9 runs) - Cost: 5.0 / 5 (111 scores across 111 runs) - Latency: 4.8 / 5 (111 scores across 111 runs) - Prompt Adherence: 4.5 / 5 (111 scores across 111 runs) - Resolution: 3.0 / 5 (111 scores across 111 runs) - Text Accuracy: 5.0 / 5 (24 scores across 24 runs) Blended overall (each scored criterion one equal vote): 3.57 / 5. Includes the interim Claude-VLM quality tier (prompt adherence, composition); not yet blind expert-panel reviewed. Because the blend is unweighted, cost and latency pull cheap, fast models above premium flagships. The use-case pages reweight the same measurements by job. ## Scores by category - Typography & Text Rendering: 4.5 / 5 - Logos, Icons & Vector-Style: 4.3 / 5 - Brand-Color Fidelity: 4.0 / 5 - Transparency & Cutouts: 3.3 / 5 - Composition & Negative Space: 4.2 / 5 - Spatial & Compositional Adherence: 4.5 / 5 - Human Subjects: Faces & Hands: 4.3 / 5 - Product & E-Commerce Staging: 4.5 / 5 - Consistency & Repeatability: 4.2 / 5 - Print Detail & Resolution: 4.5 / 5 - Style Adherence & Art Direction: 4.2 / 5 - Print-Production Graphics: 4.5 / 5 - UI & Design Mockups: 4.5 / 5 - Diagrams & Data Viz: 4.5 / 5 - Structured Spec Adherence: 4.0 / 5 ## Benchmarks featuring this model **Typography & Text Rendering** - [Wordmark](https://img.ly/ai-benchmarks/prompts/t04-wordmark.md) - [Poster Headline](https://img.ly/ai-benchmarks/prompts/t01-poster-headline.md) - [Product Label](https://img.ly/ai-benchmarks/prompts/t02-dense-label.md) - [CJK Neon Sign](https://img.ly/ai-benchmarks/prompts/t05-cjk-sign.md) **Logos, Icons & Vector-Style** - [Mascot Logo](https://img.ly/ai-benchmarks/prompts/l02-mascot.md) - [Icon Set](https://img.ly/ai-benchmarks/prompts/l01-icon-set.md) - [Monochrome Emblem](https://img.ly/ai-benchmarks/prompts/l03-emblem.md) **Brand-Color Fidelity** - [Two-Color Illustration](https://img.ly/ai-benchmarks/prompts/b01-two-color.md) - [Duotone Portrait](https://img.ly/ai-benchmarks/prompts/b03-duotone.md) - [ColorChecker Chart](https://img.ly/ai-benchmarks/prompts/b04-colorchecker.md) - [Smooth Gradient](https://img.ly/ai-benchmarks/prompts/b05-gradient-banding.md) **Transparency & Cutouts** - [Die-Cut Sticker](https://img.ly/ai-benchmarks/prompts/c01-sticker.md) - [T-Shirt Graphic](https://img.ly/ai-benchmarks/prompts/c02-shirt-graphic.md) - [Isolated Cutout](https://img.ly/ai-benchmarks/prompts/c03-isolated-object.md) **Composition & Negative Space** - [Banner with Negative Space](https://img.ly/ai-benchmarks/prompts/n01-banner.md) - [Vertical Story Background](https://img.ly/ai-benchmarks/prompts/n02-story-bg.md) - [Centered Product Margin](https://img.ly/ai-benchmarks/prompts/n03-margin-product.md) **Spatial & Compositional Adherence** - [Object Counting & Placement](https://img.ly/ai-benchmarks/prompts/x01-objects.md) - [Scene Relations](https://img.ly/ai-benchmarks/prompts/x02-scene-relations.md) - [Negation: Clean Background](https://img.ly/ai-benchmarks/prompts/x03-negation.md) **Human Subjects: Faces & Hands** - [Hand Holding a Sphere](https://img.ly/ai-benchmarks/prompts/h03-sphere-grip.md) **Product & E-Commerce Staging** - [Cosmetics Hero](https://img.ly/ai-benchmarks/prompts/p01-cosmetics.md) - [Floating Sneaker](https://img.ly/ai-benchmarks/prompts/p02-sneaker.md) **Consistency & Repeatability** - [Character Series: Greenhouse](https://img.ly/ai-benchmarks/prompts/s01-character-greenhouse.md) - [Character Series: Desk](https://img.ly/ai-benchmarks/prompts/s02-character-desk.md) - [Character Series: Market](https://img.ly/ai-benchmarks/prompts/s03-character-market.md) **Print Detail & Resolution** - [Fine-Line Mandala](https://img.ly/ai-benchmarks/prompts/r01-mandala.md) - [Illustrated Map](https://img.ly/ai-benchmarks/prompts/r02-map.md) **Style Adherence & Art Direction** - [Mid-Century Travel Poster](https://img.ly/ai-benchmarks/prompts/a01-travel-poster.md) - [Isometric Office](https://img.ly/ai-benchmarks/prompts/a03-isometric.md) **Print-Production Graphics** - [Greeting Card](https://img.ly/ai-benchmarks/prompts/g01-greeting-card.md) - [Seamless Pattern Tile](https://img.ly/ai-benchmarks/prompts/g03-pattern-tile.md) - [Stationery Mockup](https://img.ly/ai-benchmarks/prompts/g04-stationery-mockup.md) - [Three-Panel Comic](https://img.ly/ai-benchmarks/prompts/g05-comic-strip.md) **UI & Design Mockups** - [E-Commerce Product Page](https://img.ly/ai-benchmarks/prompts/ui03-pdp.md) **Diagrams & Data Viz** - [Labeled Bar Chart](https://img.ly/ai-benchmarks/prompts/d01-bar-chart.md) **Structured Spec Adherence** - [Structured JSON Scene](https://img.ly/ai-benchmarks/prompts/j01-json-scene.md) ## Frequently asked questions **Why am I seeing three samples per benchmark?** Image generation is stochastic: the same prompt produces different images on every run, so a single sample measures luck, not ability. Every model runs each benchmark three times with fixed seeds (1111, 2222, 3333), or three unseeded samples where the API accepts no seed. Scores average all three samples, and the consistency benchmarks measure the variation itself. **Is FLUX 3 Image Klein good at ui & design mockups?** UI & Design Mockups is where FLUX 3 Image Klein scores best against its own other categories, which is not the same as leading the field there. The per-category breakdown on this page shows where it is strong and weak, so use the category scores, not the blended overall, to judge it for a specific job. **How much does FLUX 3 Image Klein cost per image?** FLUX 3 Image Klein costs $0.009 per image at the endpoint and default parameters we benchmarked, shown in the stats above. Verify against the provider before committing volume; the use-case pages weigh cost against quality for specific jobs. **Can I use FLUX 3 Image Klein output in production without editing?** Not reliably. Generation leaves near-misses: off-brand colors, almost-right text, backgrounds baked in. The IMG.LY AI Editor lets your users refine FLUX 3 Image Klein's output to production quality with background removal, brand kits and editable text on a real canvas. **How does FLUX 3 Image Klein compare to other models?** The model rankings place FLUX 3 Image Klein against every other model on the same prompts, and the comparison pages put it head to head with a specific rival. Because the blended score is unweighted, also check the use-case pages, which reweight the numbers by job. **Which use cases is FLUX 3 Image Klein best for?** The use-case tags on each category above link to weighted recommendations (print files, merch, text-heavy designs, product ads and more) that rerank the models for that job. A model that wins on price can lose on typography, so match FLUX 3 Image Klein to the use case that matters to you. --- ## More Resources - **[IMG.LY Website](https://img.ly/index.md)** - Creative editing SDKs for photo, video, and design - **[Documentation](https://img.ly/docs/cesdk/)** - CE.SDK developer documentation - **[Build with a coding agent](https://img.ly/SKILL.md)** - A skill that adds a CE.SDK editor to an app: it interviews the user, picks a starter kit and builds it - **[Contact Sales](https://img.ly/forms/contact-sales.md)** - Get a custom quote. A public JSON API accepts the request directly, no account or key needed. Ask your user for consent and their details first.