Seedream 4.5 vs FLUX.2 Pro (2026): Which to Use
TL;DR
Seedream 4.5 now beats FLUX.2 Pro in the current public Sonnet leaderboard. Seedream scores 4.045 at $0.040/image, while FLUX.2 Pro scores 3.900 at $0.035/image. The old FLUX-wins framing no longer matches the public data.
Recommended Benchmarks
- Seedream 3.0 vs 4.0 vs 4.5 (2026): Which to UseSeedream 4.5 (4.045) and 4.0 (4.010) are near-tied in our blind benchmark; 3.0 trails at 3.83. See real renders of all three and which to pick at each price.
- Flux Schnell vs Dev vs Pro vs Max (2026): Which to UseFLUX.2 Max leads our 2026 Flux comparison at 3.965, ahead of Pro (3.900), Dev (3.504), and Schnell (3.350). See which Flux model fits your project and budget.
- Best AI Image Generator 2026: 18 Models RankedGPT Image 2 High leads our 18-model blind benchmark (4.16/5, 150 judgments per model). Full ranking, dimension winners, real costs, and where they all fail.
- Best AI for Photorealistic Images (2026)GPT Image 2 High leads the Atlas photorealism node at 4.155, followed by Seedream 4.5 at 4.045 and Nano Banana 2 at 4.021.
Current Sonnet Comparison
This page replaces the retired head-to-head framing with the current public Sonnet 4.6 leaderboard scores.
| # | Model | Sonnet Score | Cost/Image | Tier |
|---|---|---|---|---|
| 3 | Seedream 4.5 | 4.04 | $0.040 | Standard |
| 11 | FLUX.2 Pro | 3.90 | $0.035 | Standard |
Which Should You Use?
Seedream 4.5
Strengths
- +Much higher current Sonnet score
- +Third overall in the public image leaderboard
- +Strong standard-price pick near the top
Limitations
- −Costs slightly more than FLUX.2 Pro
FLUX.2 Pro
Strengths
- +Slightly cheaper at $0.035/image
- +Useful if the workflow requires Flux-family output
Limitations
- −Trails Seedream 4.5 by 0.145 points
- −No longer the stronger current public pick
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Methodology: Rankings and scores in this article align to VibeDex's current Sonnet 4.6 blind benchmark: 50 prompts, 3 passes, and 150 judgments per model across visual fidelity, physics, subject integrity, and instruction adherence. See our full methodology
FAQ
Is Seedream 4.5 better than FLUX.2 Pro now?
Yes. In the current Sonnet leaderboard, Seedream 4.5 scores 4.045 versus 3.900 for FLUX.2 Pro.
Which is cheaper?
FLUX.2 Pro is slightly cheaper at $0.035/image versus $0.040/image for Seedream 4.5.
Does this article use retired head-to-head win counts?
No. This rewrite uses current Sonnet leaderboard scores only.
See how every model stacks up
The Vibedex leaderboard ranks 18 image models on a 50-prompt blind benchmark, judged by Claude Sonnet 4.6 across visual fidelity, physics, subject integrity, and instruction adherence.
See the leaderboard →