Pairwise benchmark snapshot · Aug 1, 2026noindex (thin pair)

Kimi K2 vs Seedream 4.0 benchmark

Name: Kimi K2 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 Kimi K2 and Seedream 4.0. Review the complete breakdown below to determine which model best fits your performance and budget requirements.

Share Analysis:

Moonshot

Kimi K2

Moonshot foundation model with strong native bilingual reasoning and 65.8% SWE-bench Verified coding baseline.

K2 BaseImg Elo 1,465

ByteDance

Seedream 4.0

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

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

Kimi Series Lineage & Sibling Variants

4 models

Currently comparing Kimi K2 vs Seedream 4.0. Alternative family tiers available.

Active: Kimi K2

Kimi K3$2.5 Kimi K2.5 Max$2 Kimi Chat 1.5$0.8

Top Rival Showdowns for Kimi K2

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

Head-to-Head Comparison

Overall Matchup Breakdown

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

Kimi K2 (0)vsSeedream 4.0 (5)

Kimi K2: 0W (0%)Overall: Seedream 4.0Seedream 4.0: 5W (100%)

← Kimi K2Seedream 4.0 →

🏆Seedream 4.0(3/3)

Visual Quality & Adherence

Arena Preference Elo, prompt fidelity & typography score

Benchmark

Kimi K2vsSeedream 4.0

Image Elo

—vs1,225

Prompt adherence

—vs89%

Text rendering

—vs88%

Kimi K2: 0WSeedream 4.0: 3W

🏆Seedream 4.0(1/1)

Generation Latency

Time to render full-resolution image snapshot (seconds)

Benchmark

Kimi K2vsSeedream 4.0

Generation time

—vs2.8s

Kimi K2: 0WSeedream 4.0: 1W

🏆Seedream 4.0(1/1)

Cost Efficiency

API inference cost per 1,000 generated images

Benchmark

Kimi K2vsSeedream 4.0

Price per 1k images

—vs$30/1k

Kimi K2: 0WSeedream 4.0: 1W

Side-by-Side Benchmark Matrix

Image Elo

Kimi K2—

Seedream 4.01,225

seed-bootstrap · Aug 1, 2026

Generation time

Kimi K2—

Seedream 4.02.8s

seed-bootstrap · Aug 1, 2026

Price per 1k images

Kimi K2—

Seedream 4.0$30/1k

seed-bootstrap · Aug 1, 2026

Prompt adherence

Kimi K2—

Seedream 4.089%

seed-bootstrap · Aug 1, 2026

Text rendering

Kimi K2—

Seedream 4.088%

seed-bootstrap · Aug 1, 2026

Benchmark	Kimi K2	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	—

Interactive Simulator (USD)

Workload Cost & Savings Calculator

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

Save up to 100% with Kimi K2

Monthly Image Production Volume25k images / month (25000 imgs)

Quick Presets:

Kimi K2$0.00 / mo

Rate: $0/1k

Seedream 4.0$750.00 / mo

Rate: $30/1k

Estimated Cost Delta

Kimi K2 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 / 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

Cast Your Matchup Vote

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Community Discussions (0)

No comments posted on this matchup yet. Be the first to share an evaluation note!

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CompareLLM AI Matrix

Verified Head-to-Head Telemetry

LIVE BENCHMARK

Moonshot

Kimi K2

Elo 1,465

SWE-bench65.8%

Speed (tok/s)85 tok/s

Input / 1M Tokens$0.35/1M

Output / 1M Tokens$1.4/1M

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, Kimi K2 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, Kimi K2 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, Kimi K2 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. Kimi K2 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 Kimi K2 matchups →|All Seedream 4.0 matchups →

Kimi K2 vs Kimi Chat 1.5 (previous kimi)Kimi K2 vs Kimi K2.5 Max (next kimi)Seedream 4.0 vs Seedream 5.0 Pro (next seed)Doubao Pro 1.5 vs Kimi K2 Kimi K3 vs Kimi K2 Seed 2.1 Turbo vs Kimi K2

Benchmark

Kimi K2

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 / 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, Kimi K2 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, Kimi K2 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, Kimi K2 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. Kimi K2 and Seedream 4.0 Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.