Pairwise benchmark snapshot · Aug 17, 2026noindex (thin pair)

Qwen: Qwen3.5-27B vs Seedream 4.0 benchmark

Name: Qwen: Qwen3.5-27B vs Seedream 4.0 AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

Comparing verified benchmark accuracy, speed, and token pricing between Qwen: Qwen3.5-27B and Seedream 4.0. Review the complete breakdown below to determine which model best fits your performance and budget requirements.

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Executive Verdict Summary

Qwen: Qwen3.5-27B holds empirical advantage (0 of 0 metrics)

Coding / SWESWE-bench

Qwen: Qwen3.5-27BTop code solve rate

ReasoningGPQA / Live

Qwen: Qwen3.5-27BTop logical accuracy

Best Value$/1M Tok

Qwen: Qwen3.5-27BLowest API billing cost

Speed / TokTok/Sec

Qwen: Qwen3.5-27BFastest stream rate

Alibaba

Qwen: Qwen3.5-27B

Auto-discovered from OpenRouter (qwen/qwen3.5-27b). Preview until a second source matches.

ByteDance

Seedream 4.0

High-value ByteDance image foundation model at $30/1k images.

v4.0Img Elo 1,225$30/1k imgs

Top Rival Showdowns for Qwen: Qwen3.5-27B

All Matchups

Compare vs:vs GPT Image 2 (High)vs Reve 2.1 vs Nano Banana Pro (Gemini 3 Pro Image)vs FLUX.2 [max]vs Ideogram 4.0 (Quality)

Image Quality Leader

No shared data

Single model data

Generation Speed Leader

No shared data

No latency data

Value per Dollar Leader

No shared data

Unpriced

Overall Matchup Breakdown

Category wins across reasoning intelligence, generation speed, and token cost.

Qwen: Qwen3.5-27B (0)vsSeedream 4.0 (5)

Qwen: Qwen3.5-27B: 0W (0%)Seedream 4.0: 5W (100%)

← Qwen: Qwen3.5-27BSeedream 4.0 →

🏆Seedream 4.0 Leads(3/3)

Visual Quality & Adherence

Arena Preference Elo, prompt fidelity & typography score

Benchmark

Qwen: Qwen3.5-27BvsSeedream 4.0

Image Elo

—vs1,225

Prompt adherence

—vs89%

Text rendering

—vs88%

Qwen: Qwen3.5-27B: 0WSeedream 4.0: 3W

🏆Seedream 4.0 Leads(1/1)

Generation Latency

Time to render full-resolution image snapshot (seconds)

Benchmark

Qwen: Qwen3.5-27BvsSeedream 4.0

Generation time

—vs2.8s

Qwen: Qwen3.5-27B: 0WSeedream 4.0: 1W

🏆Seedream 4.0 Leads(1/1)

Cost Efficiency

API inference cost per 1,000 generated images

Benchmark

Qwen: Qwen3.5-27BvsSeedream 4.0

Price per 1k images

—vs$30/1k

Qwen: Qwen3.5-27B: 0WSeedream 4.0: 1W

Side-by-Side Benchmark Matrix

Qwen: Qwen3.5-27BSeedream 4.0

Image Elo

Qwen: Qwen3.5-27B—

Seedream 4.01,225

Generation time

Qwen: Qwen3.5-27B—

Seedream 4.02.8s

Price per 1k images

Qwen: Qwen3.5-27B—

Seedream 4.0$30/1k

Prompt adherence

Qwen: Qwen3.5-27B—

Seedream 4.089%

Text rendering

Qwen: Qwen3.5-27B—

Seedream 4.088%

Benchmark	Qwen: Qwen3.5-27B	Seedream 4.0	Advantage Delta
Image Elo	—	1,225 seed-bootstrap · Aug 1, 2026	—
Generation time	—	2.8s seed-bootstrap · Aug 1, 2026	—
Price per 1k images	—	$30/1k seed-bootstrap · Aug 1, 2026	—
Prompt adherence	—	89% seed-bootstrap · Aug 1, 2026	—
Text rendering	—	88% seed-bootstrap · Aug 1, 2026	—

Workload Cost & Savings Calculator

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

Save 100% with Qwen: Qwen3.5-27B

Monthly Image Production Volume25k images / month (25000 imgs)

Quick Presets:

Qwen: Qwen3.5-27B$0.00 / mo

Rate: $0/1k

Seedream 4.0$750.00 / mo

Rate: $30/1k

Estimated Cost Delta

Qwen: Qwen3.5-27B is estimated to save $750.00/month ($9,000/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 / visionSeedream 4.0

Seedream 4.0 is the side marked multimodal in the catalog.

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	Seedream 4.0	Seedream 4.0 is the side marked multimodal in the catalog.

Cast Your Matchup Vote

0 total votes

Community Discussions (0)

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CompareLLM AI Matrix

Verified Head-to-Head Telemetry

LIVE BENCHMARK

Alibaba

Qwen: Qwen3.5-27B

Elo n/a

SWE-bench—

Speed (tok/s)262k

Input / 1M Tokens$0.195/1M

Output / 1M Tokens$1.56/1M

ByteDance

Seedream 4.0

Elo n/a

SWE-bench—

Speed (tok/s)—

Input / 1M Tokens$30/1k

Output / 1M Tokens$30/1k

Frequently Asked Questions

Which is better overall, Qwen: Qwen3.5-27B or Seedream 4.0?: 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, Qwen: Qwen3.5-27B or Seedream 4.0?: 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, Qwen: Qwen3.5-27B or Seedream 4.0?: 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?: Neither model is marked open-weights here. You are comparing hosted APIs.
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. Qwen: Qwen3.5-27B and Seedream 4.0 Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All Qwen: Qwen3.5-27B matchups →|All Seedream 4.0 matchups →

Seedream 4.0 vs Seedream 5.0 Pro (next seed)Qwen Image 2.0 Pro vs Seedream 4.0 GPT Image 2 (High) vs Seedream 4.0 Reve 2.1 vs Seedream 4.0 Nano Banana Pro (Gemini 3 Pro Image) vs Seedream 4.0 Nano Banana 2 (Gemini 3.1 Flash Image) vs Seedream 4.0

Side-by-Side Benchmark Matrix

Qwen: Qwen3.5-27BSeedream 4.0

Image Elo

Qwen: Qwen3.5-27B—

Seedream 4.01,225

Generation time

Qwen: Qwen3.5-27B—

Seedream 4.02.8s

Price per 1k images

Qwen: Qwen3.5-27B—

Seedream 4.0$30/1k

Prompt adherence

Qwen: Qwen3.5-27B—

Seedream 4.089%

Text rendering

Qwen: Qwen3.5-27B—

Seedream 4.088%

Benchmark

Qwen: Qwen3.5-27B

Seedream 4.0

Advantage Delta

Image Elo

—

1,225

seed-bootstrap · Aug 1, 2026

—

Generation time

—

2.8s

seed-bootstrap · Aug 1, 2026

—

Price per 1k images

—

$30/1k

seed-bootstrap · Aug 1, 2026

—

Prompt adherence

—

89%

seed-bootstrap · Aug 1, 2026

—

Text rendering

—

88%

seed-bootstrap · Aug 1, 2026

—

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 / visionSeedream 4.0

Seedream 4.0 is the side marked multimodal in the catalog.

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	Seedream 4.0	Seedream 4.0 is the side marked multimodal in the catalog.

Frequently Asked Questions

Which is better overall, Qwen: Qwen3.5-27B or Seedream 4.0?

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, Qwen: Qwen3.5-27B or Seedream 4.0?

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, Qwen: Qwen3.5-27B or Seedream 4.0?

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?

Neither model is marked open-weights here. You are comparing hosted APIs.

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. Qwen: Qwen3.5-27B and Seedream 4.0 Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.