Decision support
FLUX.2 Flex vs Seedream 4.0
Compare canonical objects directly. The useful dimensions change with the object type, so model and hardware comparisons stay separate.
ByteDance
Benchmark results
Head to head on 2 benchmarks both models report
- FLUX.2 Flex1lead
- Seedream 4.01lead
Arena Text to Image
Arena rating · Higher is better
- FLUX.2 FlexBest1156+18 ahead · Arena #32CI 1153 to 1160
- Seedream 4.01138Arena #43CI 1132 to 1145
Runs and sources
FLUX.2 Flex- default115695% CI 1153 to 1160 · 153,015 votes
Seedream 4.0- default11382K · 95% CI 1132 to 1145 · 12,274 votes
- default1116fal · 95% CI 1109 to 1122 · 11,708 votes
- default1113High Res, fal · 95% CI 1109 to 1116 · 178,506 votes
Arena Image Edit
Arena rating · Higher is better
- FLUX.2 Flex1224Arena #46CI 1221 to 1228
- Seedream 4.0Best1267+43 ahead · Arena #36CI 1260 to 1274
Runs and sources
FLUX.2 Flex- default122495% CI 1221 to 1228 · 434,160 votes
Seedream 4.0- default12672K · 95% CI 1260 to 1274 · 208,553 votes
- default1216High Res, fal · 95% CI 1213 to 1219 · 1,212,501 votes
- default1209fal · 95% CI 1203 to 1216 · 151,431 votes
Each model's best published result is shown; "Not reported" means no matched evaluation, not a score of zero. Arena and DeepSWE ranks are the leaderboards' own; other ranks are among catalogue models with a score. Results from different harnesses or settings are not directly comparable.
Arena ratings: Arena (lmarena-ai/leaderboard-dataset), licensed CC BY 4.0. Ratings come from pairwise human votes and are only comparable within one leaderboard; the interval is Arena's 95% confidence interval. Model names are matched to the Vertical Tabs catalog.
Model specifications
API pricing · USD per 1M tokens
Capabilities and modalities
Architecture and availability
A dash means the field is not reported. Provider-specific performance and pricing may differ.