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

Kwaipilot: KAT-Coder-Air V2.5 vs Seedream 4.0 benchmark

Name: Kwaipilot: KAT-Coder-Air V2.5 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 Kwaipilot: KAT-Coder-Air V2.5 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

Kwaipilot: KAT-Coder-Air V2.5 holds empirical advantage (0 of 0 metrics)

Coding / SWESWE-bench

Kwaipilot: KAT-Coder-Air V2.5Top code solve rate

ReasoningGPQA / Live

Kwaipilot: KAT-Coder-Air V2.5Top logical accuracy

Best Value$/1M Tok

Kwaipilot: KAT-Coder-Air V2.5Lowest API billing cost

Speed / TokTok/Sec

Kwaipilot: KAT-Coder-Air V2.5Fastest stream rate

kwaipilot

Kwaipilot: KAT-Coder-Air V2.5

Auto-discovered from OpenRouter (kwaipilot/kat-coder-air-v2.5). 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 Kwaipilot: KAT-Coder-Air V2.5

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.

Kwaipilot: KAT-Coder-Air V2.5 (0)vsSeedream 4.0 (5)

Kwaipilot: KAT-Coder-Air V2.5: 0W (0%)Seedream 4.0: 5W (100%)

← Kwaipilot: KAT-Coder-Air V2.5Seedream 4.0 →

🏆Seedream 4.0 Leads(3/3)

Visual Quality & Adherence

Arena Preference Elo, prompt fidelity & typography score

Benchmark

Kwaipilot: KAT-Coder-Air V2.5vsSeedream 4.0

Image Elo

—vs1,225

Prompt adherence

—vs89%

Text rendering

—vs88%

Kwaipilot: KAT-Coder-Air V2.5: 0WSeedream 4.0: 3W

🏆Seedream 4.0 Leads(1/1)

Generation Latency

Time to render full-resolution image snapshot (seconds)

Benchmark

Kwaipilot: KAT-Coder-Air V2.5vsSeedream 4.0

Generation time

—vs2.8s

Kwaipilot: KAT-Coder-Air V2.5: 0WSeedream 4.0: 1W

🏆Seedream 4.0 Leads(1/1)

Cost Efficiency

API inference cost per 1,000 generated images

Benchmark

Kwaipilot: KAT-Coder-Air V2.5vsSeedream 4.0

Price per 1k images

—vs$30/1k

Kwaipilot: KAT-Coder-Air V2.5: 0WSeedream 4.0: 1W

Side-by-Side Benchmark Matrix

Kwaipilot: KAT-Coder-Air V2.5Seedream 4.0

Image Elo

Kwaipilot: KAT-Coder-Air V2.5—

Seedream 4.01,225

Generation time

Kwaipilot: KAT-Coder-Air V2.5—

Seedream 4.02.8s

Price per 1k images

Kwaipilot: KAT-Coder-Air V2.5—

Seedream 4.0$30/1k

Prompt adherence

Kwaipilot: KAT-Coder-Air V2.5—

Seedream 4.089%

Text rendering

Kwaipilot: KAT-Coder-Air V2.5—

Seedream 4.088%

Benchmark	Kwaipilot: KAT-Coder-Air V2.5	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 Kwaipilot: KAT-Coder-Air V2.5

Monthly Image Production Volume25k images / month (25000 imgs)

Quick Presets:

Kwaipilot: KAT-Coder-Air V2.5$0.00 / mo

Rate: $0/1k

Seedream 4.0$750.00 / mo

Rate: $30/1k

Estimated Cost Delta

Kwaipilot: KAT-Coder-Air V2.5 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

kwaipilot

Kwaipilot: KAT-Coder-Air V2.5

Elo n/a

SWE-bench—

Speed (tok/s)256k

Input / 1M Tokens$0.15/1M

Output / 1M Tokens$0.6/1M

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, Kwaipilot: KAT-Coder-Air V2.5 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, Kwaipilot: KAT-Coder-Air V2.5 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, Kwaipilot: KAT-Coder-Air V2.5 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. Kwaipilot: KAT-Coder-Air V2.5 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 Kwaipilot: KAT-Coder-Air V2.5 matchups →|All Seedream 4.0 matchups →

Seedream 4.0 vs Seedream 5.0 Pro (next seed)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 FLUX.2 [max] vs Seedream 4.0

Side-by-Side Benchmark Matrix

Kwaipilot: KAT-Coder-Air V2.5Seedream 4.0

Image Elo

Kwaipilot: KAT-Coder-Air V2.5—

Seedream 4.01,225

Generation time

Kwaipilot: KAT-Coder-Air V2.5—

Seedream 4.02.8s

Price per 1k images

Kwaipilot: KAT-Coder-Air V2.5—

Seedream 4.0$30/1k

Prompt adherence

Kwaipilot: KAT-Coder-Air V2.5—

Seedream 4.089%

Text rendering

Kwaipilot: KAT-Coder-Air V2.5—

Seedream 4.088%

Benchmark

Kwaipilot: KAT-Coder-Air V2.5

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, Kwaipilot: KAT-Coder-Air V2.5 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, Kwaipilot: KAT-Coder-Air V2.5 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, Kwaipilot: KAT-Coder-Air V2.5 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. Kwaipilot: KAT-Coder-Air V2.5 and Seedream 4.0 Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.