Seedream 5.0 Flashvs.OmniGen2

Which one is better?

In our own test, Seedream 5.0 Flash leads. Neither is in the arena. Neither has an API price.

Test images

Same task, the first image of each. The task with the biggest difference is preselected.

Seedream 5.0 Flash: Character and detail, first image from the fixed test run — Seedream 5.0 Flash75 out of 100

OmniGen2: Character and detail, first image from the fixed test run — OmniGen28 out of 100

Result for “Character and detail”:Seedream 5.0 Flash ahead

Prompt given to both modelsCreate a square cinematic full-body portrait of a fictional bicycle courier waiting under a transparent umbrella at a rainy tram stop in Hamburg at blue hour. She wears a mustard raincoat, navy trousers, red sneakers, a silver helmet, and carries a teal messenger bag. Keep both hands visible, render the bicycle correctly, use realistic wet-street reflections, and include no readable brand names.

What the rating looks at: Anatomy, clothing, and spatial consistency.

“Ahead”: better in all three rating rounds. “Slightly ahead”: a higher value, but not in every round.

Test protocol of the images

Each test attempt uses the same archived prompt and one request. The first output of that attempt counts. Repeats after technical test failures are disclosed for the affected images. Files are normalized to 1,024 × 1,024 pixels without cropping. Provider resolution, randomness, quality tier and prompt processing can still differ. The images are a practical visual test, not a reconstruction of the arena configuration.

Character and detail

Seedream 5.0 Flash: openrouter, aspect ratio 1:1, resolution 1K, n=1, seed=provider random, actual cost $0.018000, generated Nov 1, 2026, 8:29 PM. Source

OmniGen2: fal, image_size=1024x1024, n=1, seed=639237469, Estimate reserves 2 MP at Fal's $0.15 per MP rate, estimated cost $0.300000, generated Nov 2, 2026, 3:27 PM. Source

Protocol gradually-image-comparison-v1. Prompt SHA 256: 985a75b38642a9f0e5e0c0e0c67f1b7f67780d42bd2168fa24e9a7a7a94b0da6

Seedream 5.0 Flash image SHA 256: ffb32d701168dd57095e39252aba67b191c008c7b9393ae22acf1e1b1caba9b9

OmniGen2 image SHA 256: 8c39f2555d07eae2728c45591a183a4343d5ab1b9eaba4ec75a83b26f50665d0

Infographic

Seedream 5.0 Flash: openrouter, aspect ratio 1:1, resolution 1K, n=1, seed=provider random, actual cost $0.018000, generated Nov 1, 2026, 8:30 PM. Source

OmniGen2: fal, image_size=1024x1024, n=1, seed=672021196, Estimate reserves 2 MP at Fal's $0.15 per MP rate, estimated cost $0.300000, generated Nov 2, 2026, 3:27 PM. Source

Protocol gradually-image-comparison-v1. Prompt SHA 256: ed65cb4e6a51e2336f8b149ad4cbb16e020f07d527ad94362e719d2dcf91d94f

Seedream 5.0 Flash image SHA 256: 0758d1251491a26b5d7736c16597318e5807a92c30db03d9431d8584652aae3e

OmniGen2 image SHA 256: 2f1a66d64a4f6a41d1c7228eb46ff9c2f5c27b684cf43d5dc8ba18aa7a2cd783

Product photography

Seedream 5.0 Flash: openrouter, aspect ratio 1:1, resolution 1K, n=1, seed=provider random, actual cost $0.018000, generated Nov 1, 2026, 8:29 PM. Source

OmniGen2: fal, image_size=1024x1024, n=1, seed=355687008, Estimate reserves 2 MP at Fal's $0.15 per MP rate, estimated cost $0.300000, generated Nov 2, 2026, 3:27 PM. Source

Protocol gradually-image-comparison-v1. Prompt SHA 256: c67fd71e91304458a2feef5c91efa8677260fab0c0099a29a2c52cb579f5b2f3

Seedream 5.0 Flash image SHA 256: 3ea7343b12d253b6b0e090054c1e494f5a005632cc263a9b2df4d866ba6b02d0

OmniGen2 image SHA 256: 31e9ddbf26881a576ca95a7bbd2642fae4a96c4205362abe3859ade6a3da8dc7

Typography and layout

Seedream 5.0 Flash: openrouter, aspect ratio 1:1, resolution 1K, n=1, seed=provider random, actual cost $0.018000, generated Nov 1, 2026, 8:29 PM. Source

OmniGen2: fal, image_size=1024x1024, n=1, seed=713672340, Estimate reserves 2 MP at Fal's $0.15 per MP rate, estimated cost $0.300000, generated Nov 2, 2026, 3:27 PM. Source

Protocol gradually-image-comparison-v1. Prompt SHA 256: 2e012c3d14ee5dd02203a94f394ca80a5038cdebd6032b25a8b8a221f2255419

Seedream 5.0 Flash image SHA 256: b9739c9a9ab67183f268f41b7ff62a9151cef9d0c8c168eba332a2b6af057426

OmniGen2 image SHA 256: f4413e92d9fca652ec3e6bbb768a0003f064d7286b0652c1385c26b646b0c890

The numbers at a glance

Arena ratingfrom votes by users · higher is better

n/a

Seedream 5.0 Flash

not in the arena

n/a

OmniGen2

not in the arena

GraduallyBenchour own rating, 0 to 100 · higher is better

Seedream 5.0 Flash

Rank 3 of 108

OmniGen2

Rank 95 of 108

Price per imagedollars through the API · lower is better

n/a

Seedream 5.0 Flash

no API price

n/a

OmniGen2

no API price

Ranks among the 21 image models with an arena rating and the 108 with a GraduallyBench run; prices compared with 28 models with an API price.

Seedream 5.0 Flash

Subscription: No ByteDance subscription includes this model. Through other providers from €6.83 a month (Poe Basic, with limited points). 18 plans in Germany.
Via API: No API price known. Access: API.
Weights: unknown.

OmniGen2

Subscription: n/a No plan in Germany names exactly this model.
Via API: No API price known. Access: local, Web app.
License: Open weights.

Subscriptions only count plans that name exactly this model. Subscription prices include VAT, API prices are in dollars.

GraduallyBench from Nov 3, 2026 · Subscription database from Sep 29, 2026 (38 days old)

All data side by side

The better value is bold. For ratings only when the gap is clear.

Kennzahl	Seedream 5.0 Flash	OmniGen2
Ratings
Arena ratingfrom votes by users, higher is better	n/a	n/a
Arena rank	n/a	n/a
Arena votesmore votes, a safer rating	n/a	n/a
GraduallyBenchour own rating, 0 to 100	79	22
GraduallyBench by task
Typography and layoutLegible text, hierarchy, and composition	77	30
Product photographyMaterials, reflections, and fine details	77	30
Character and detailAnatomy, clothing, and spatial consistency	75	8
InfographicNumbers, labels, and visual organization	86	19
API price
Per imagelower is better	n/a	n/a
100 images	n/a	n/a
Profile
Released	n/a	Jun 16, 2025
Weightsopen means: runs locally	unknown	open
Access	API	local, Web app
Parameters	not published	not published
Largest output	not consistently published	not consistently published
Plans in Germanynaming exactly this model	18	n/a

API prices for one image at 1,024 × 1,024 pixels according to Artificial Analysis.

Sources: Seedream 5.0 Flash model source (verified Nov 1, 2026) · OmniGen2 model source (verified Nov 1, 2026)

Arena ratings by category

From blind votes on LMArena. “Ahead” means the lead is clear.

No shared arena score in the stored snapshot

The stored benchmark database contains no measurement for Seedream 5.0 Flash and OmniGen2 from the same arena and category. Older model versions are not used as substitutes.

More comparisons

Compare Seedream 5.0 Flash and OmniGen2 with the models people compare them with most often.

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