Pairwise benchmark snapshot · Aug 1, 2026

FLUX.1 [dev] vs Seedream 5.0 Pro benchmark

Name: FLUX.1 [dev] vs Seedream 5.0 Pro AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

This page compares FLUX.1 [dev] (Black Forest Labs) and Seedream 5.0 Pro (ByteDance) using the latest snapshots we have as of Aug 1, 2026. Every cell below is a dated snapshot from a named public source — we do not invent missing scores, and we do not run SWE-bench ourselves.

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Black Forest Labs

FLUX.1 [dev]

Open-weights non-commercial base model with 12B parameters, serving as the foundation for the open-source fine-tuning ecosystem.

Open Dev 12BImg Elo 1,180$30/1k imgs

ByteDance

Seedream 5.0 Pro

ByteDance flagship image generation model with high photorealism and fine facial structure rendering.

Img Elo 1,283$90/1k imgs

Model Lineage & Multi-Tier Derivatives

FLUX.1 Series Family (3 models)

Compare vs Base (FLUX.1.1 [pro])

FLUX.1.1 [pro]

Black Forest Labs

Flagship Base

Elo

1210

Latency

3.2s

Price

$50/1k

View model →vs this

FLUX.1 [dev]

Black Forest Labs

Open Dev 12B

Elo

1180

Latency

Price

$30/1k

-30 Elo-40% cost

Viewing now

FLUX.1 [schnell]

Black Forest Labs

Schnell 4-Step

Elo

1142

Latency

1.2s

Price

$15/1k

-68 Elo-70% cost

View model →vs this

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Instant pairwise benchmark recalculation across 400+ LLMs

Model A

Model B

Quick vs:vs Claude Opus 4.5 vs Claude Opus 4.6 vs Claude Sonnet 4.5 vs Claude 3.7 Sonnet

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

FLUX.1 [dev] (1)vsSeedream 5.0 Pro (4)

FLUX.1 [dev]: 1W (20%)Overall: Seedream 5.0 ProSeedream 5.0 Pro: 4W (80%)

← FLUX.1 [dev]Seedream 5.0 Pro →

Seedream 5.0 Pro (3/3)

Visual Quality & Adherence

Arena Preference Elo, prompt fidelity & typography score

Image Elo

1,180vs1,283

Prompt adherence

87.5%vs92%

Text rendering

86%vs91.5%

FLUX.1 [dev]: 0WSeedream 5.0 Pro: 3W

Seedream 5.0 Pro (1/1)

Generation Latency

Time to render full-resolution image snapshot (seconds)

Generation time

4svs3.4s

FLUX.1 [dev]: 0WSeedream 5.0 Pro: 1W

FLUX.1 [dev] (1/1)

Cost Efficiency

API inference cost per 1,000 generated images

Price per 1k images

$30/1kvs$90/1k

FLUX.1 [dev]: 1WSeedream 5.0 Pro: 0W

Capability Matchup Radar

Multi-Dimensional Capability Radar

Each spoke is a skill. Farther from the center is better (0–100th percentile). Tap any dot to inspect details.

Tap any node to inspect

Percentile 0–100

Dimensional AdvantageSeedream 5.0 Pro 4/6

Image Preference Elo

Seedream 5.0 Pro

103 pts advantage

Generation Latency

Seedream 5.0 Pro

0.6s faster

Image Price Efficiency

FLUX.1 [dev]

$60.0/1k cheaper

Full Benchmark Score Matrix

—

Img Elo

High is better

1,180

Img EloHigh is better

1,283+9%

Gen Time

Low is better

Gen TimeLow is better

3.4s+18%

Img $

Low is better

+200%$30/1k

Img $Low is better

$90/1k

Prompt %

High is better

87.5%

Prompt %High is better

92%+5%

Text %

High is better

86%

Text %High is better

91.5%+6%

Interactive Simulator (USD)

Workload Cost & Savings Calculator

Simulate monthly production API costs in USD (US Dollar).

Save up to 67% with FLUX.1 [dev]

Monthly Image Production Volume25k images / month (25000 imgs)

Quick Presets:

FLUX.1 [dev]$750.00 / mo

Rate: $30/1k

Seedream 5.0 Pro$2,250.00 / mo

Rate: $90/1k

Estimated Cost Delta

FLUX.1 [dev] is estimated to save $1,500.00/month ($18,000/year).

Based on 25k images generated

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatinsufficient data

Need list prices.

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGinsufficient data

Need context sizes.

Screenshots / visioninsufficient data

Both accept images. Defaulting to the higher-Elo side (undefined).

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	insufficient data	Need SWE-bench on both sides.
High-volume chat	insufficient data	Need list prices.
Voice / low-latency UI	insufficient data	Need TTFT on both sides.
Long-document RAG	insufficient data	Need context sizes.
Screenshots / vision	insufficient data	Both accept images. Defaulting to the higher-Elo side (undefined).

Community Sentiment

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CompareLLM Matrix

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LIVE

Black Forest Labs

FLUX.1 [dev]

Elo n/a

LiveBench—

SWE-bench—

Speed—

Output cost—

ByteDance

Seedream 5.0 Pro

Elo n/a

LiveBench—

SWE-bench—

Speed—

Output cost—

Frequently Asked Questions

Which is better overall, FLUX.1 [dev] or Seedream 5.0 Pro?: We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.
Which is better at coding, FLUX.1 [dev] or Seedream 5.0 Pro?: SWE-bench is missing for at least one model, so we do not rank coding from a single number.
Which is cheaper to run in production?: List prices are missing for at least one model.
Which is faster, FLUX.1 [dev] or Seedream 5.0 Pro?: We do not have TTFT for both models.
Which has the larger context window?: Context window is missing for at least one model.
Can I self-host either model?: FLUX.1 [dev] is marked open-weights in our catalog. The other side is a closed API. Check the provider license before you ship weights.
Are these scores from CompareLLM’s own evals?: No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.
What does preference Elo mean on this page?: Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. FLUX.1 [dev] and Seedream 5.0 Pro Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All FLUX.1 [dev] matchups →|All Seedream 5.0 Pro matchups →

FLUX.1 [dev] vs FLUX.1 [schnell] (next flux)Seedream 5.0 Pro vs Seedream 4.0 (previous seed)FLUX.2 [max] vs Seedream 5.0 Pro FLUX.2 [flex] vs Seedream 5.0 Pro FLUX.1.1 [pro] vs Seedream 5.0 Pro FLUX.1 [schnell] vs Seedream 5.0 Pro

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

FLUX.1 [dev] (1)vsSeedream 5.0 Pro (4)

FLUX.1 [dev]: 1W (20%)Overall: Seedream 5.0 ProSeedream 5.0 Pro: 4W (80%)

← FLUX.1 [dev]Seedream 5.0 Pro →

Seedream 5.0 Pro (3/3)

Visual Quality & Adherence

Arena Preference Elo, prompt fidelity & typography score

Image Elo

1,180vs1,283

Prompt adherence

87.5%vs92%

Text rendering

86%vs91.5%

FLUX.1 [dev]: 0WSeedream 5.0 Pro: 3W

Seedream 5.0 Pro (1/1)

Generation Latency

Time to render full-resolution image snapshot (seconds)

Generation time

4svs3.4s

FLUX.1 [dev]: 0WSeedream 5.0 Pro: 1W

FLUX.1 [dev] (1/1)

Cost Efficiency

API inference cost per 1,000 generated images

Price per 1k images

$30/1kvs$90/1k

FLUX.1 [dev]: 1WSeedream 5.0 Pro: 0W

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatinsufficient data

Need list prices.

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGinsufficient data

Need context sizes.

Screenshots / visioninsufficient data

Both accept images. Defaulting to the higher-Elo side (undefined).

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	insufficient data	Need SWE-bench on both sides.
High-volume chat	insufficient data	Need list prices.
Voice / low-latency UI	insufficient data	Need TTFT on both sides.
Long-document RAG	insufficient data	Need context sizes.
Screenshots / vision	insufficient data	Both accept images. Defaulting to the higher-Elo side (undefined).

Frequently Asked Questions

Which is better overall, FLUX.1 [dev] or Seedream 5.0 Pro?

We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.

Which is better at coding, FLUX.1 [dev] or Seedream 5.0 Pro?

SWE-bench is missing for at least one model, so we do not rank coding from a single number.

Which is cheaper to run in production?

List prices are missing for at least one model.

Which is faster, FLUX.1 [dev] or Seedream 5.0 Pro?

We do not have TTFT for both models.

Which has the larger context window?

Context window is missing for at least one model.

Can I self-host either model?

FLUX.1 [dev] is marked open-weights in our catalog. The other side is a closed API. Check the provider license before you ship weights.

Are these scores from CompareLLM’s own evals?

No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.

What does preference Elo mean on this page?

Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. FLUX.1 [dev] and Seedream 5.0 Pro Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.