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

Seed 2.1 Turbo vs ByteDance: UI-TARS 7B benchmark

Name: Seed 2.1 Turbo vs ByteDance: UI-TARS 7B AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

This page compares Seed 2.1 Turbo (ByteDance) and ByteDance: UI-TARS 7B (ByteDance) using the latest snapshots we have as of Aug 17, 2026. ByteDance: UI-TARS 7B wins on output price at $0.2/1M. Seed 2.1 Turbo has the larger context window (262k tokens). 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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ByteDance

Seed 2.1 Turbo

ByteDance Seed 2.1 Turbo, listed on public model timelines as an Aug 10 2026 API drop.

Seed 2.1Elo 1,472$2.5/1M out

ByteDance

ByteDance: UI-TARS 7B

Auto-discovered from OpenRouter (bytedance/ui-tars-1.5-7b). Preview until a second source matches.

$0.19999999999999998/1M out

Model Lineage & Multi-Tier Derivatives🇨🇳 CN Frontier

Doubao Series Family (3 models)

Compare vs Base (Doubao Pro 1.5)

Doubao Pro 1.5

ByteDance

Flagship Base

Elo

1470

Speed

105 tok/s

Price

$0.28 / 1M

View model →vs this

Doubao Lite 1.5

ByteDance

Lite 1.5

Elo

1360

Speed

180 tok/s

Price

$0.10 / 1M

-110 Elo-64% cost1.7x speed

View model →vs this

Seed 2.1 Turbo

ByteDance

Seed 2.1

Elo

1472

Speed

160 tok/s

Price

$2.50 / 1M

+2 Elo+793% cost1.5x speed

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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.

Seed 2.1 Turbo (8)vsByteDance: UI-TARS 7B (2)

Seed 2.1 Turbo: 8W (80%)Overall: Seed 2.1 TurboByteDance: UI-TARS 7B : 2W (20%)

← Seed 2.1 TurboByteDance: UI-TARS 7B →

Seed 2.1 Turbo (5/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo

1,472vs—

Coding Elo

1,480vs—

SWE-bench

63.2%vs—

LiveBench

64.8%vs—

GPQA Diamond

76.8%vs—

Seed 2.1 Turbo: 5WByteDance: UI-TARS 7B : 0W

Seed 2.1 Turbo (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

160 tok/svs—

Time to first token

120 msvs—

Seed 2.1 Turbo: 2WByteDance: UI-TARS 7B : 0W

ByteDance: UI-TARS 7B (2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$2.5/1Mvs$0.2/1M

Input price

$0.5/1Mvs$0.1/1M

Context window

262kvs128k

Seed 2.1 Turbo: 1WByteDance: UI-TARS 7B : 2W

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 AdvantageSeed 2.1 Turbo 5/6

Preference Elo

No shared data

Throughput Speed

No shared data

Token Price Efficiency

ByteDance: UI-TARS 7B

$2.30/1M cheaper

Full Benchmark Score Matrix

—

Elo

High is better

1,472

EloHigh is better

—

Code Elo

High is better

1,480

Code EloHigh is better

—

LiveBench

High is better

64.8%

LiveBenchHigh is better

—

SWE-bench

High is better

63.2%

SWE-benchHigh is better

—

GPQA

High is better

76.8%

GPQAHigh is better

—

TTFT

Low is better

120 ms

TTFTLow is better

—

Speed

High is better

160 tok/s

SpeedHigh is better

—

In $

Low is better

$0.50 / 1M

In $Low is better

$0.10 / 1M+400%

Out $

Low is better

$2.50 / 1M

Out $Low is better

$0.20 / 1M+1150%

Context

High is better

+105%262k

ContextHigh is better

128k

Interactive Simulator (USD)

Workload Cost & Savings Calculator

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

Save up to 88% with ByteDance: UI-TARS 7B

Monthly Volume50M tokens/mo

Quick Presets:

Token Ratio (In vs Out)70% In / 30% Out

RAG / Search (10% out)Coding / Chat (50% out)

Seed 2.1 Turbo$55.00 / mo

In: $17.5Out: $37.5

ByteDance: UI-TARS 7B $6.50 / mo

In: $3.5Out: $3

Estimated Cost Delta

ByteDance: UI-TARS 7B is estimated to save $48.50/month ($582/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

1
ByteDance: UI-TARS 7B :Pick ByteDance: UI-TARS 7B when you are optimizing output cost.

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatByteDance: UI-TARS 7B

Lower output list price ($0.2/1M).

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGSeed 2.1 Turbo

Larger window (262k).

Screenshots / visionSeed 2.1 Turbo

Seed 2.1 Turbo 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	ByteDance: UI-TARS 7B	Lower output list price ($0.2/1M).
Voice / low-latency UI	insufficient data	Need TTFT on both sides.
Long-document RAG	Seed 2.1 Turbo	Larger window (262k).
Screenshots / vision	Seed 2.1 Turbo	Seed 2.1 Turbo is the side marked multimodal in the catalog.

Related Editorial Dispatches & Benchmark Notes

View all news

launchAug 10, 2026

Seed 2.1 Turbo (Aug 10): ByteDance’s API drop on the public timeline

Listed on public model timelines as an Aug 10 2026 API drop. Preview-quality story, indexable because we have a full snapshot.

Community Sentiment

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CompareLLM Matrix

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LIVE

ByteDance

Seed 2.1 Turbo

Elo 1,472

LiveBench64.8%

SWE-bench63.2%

Speed160 tok/s

Output cost$2.5/1M

ByteDance

ByteDance: UI-TARS 7B

Elo n/a

LiveBench—

SWE-bench—

Speed—

Output cost$0.2/1M

Frequently Asked Questions

Which is better overall, Seed 2.1 Turbo or ByteDance: UI-TARS 7B ?: 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, Seed 2.1 Turbo or ByteDance: UI-TARS 7B ?: 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?: ByteDance: UI-TARS 7B output tokens are $0.2/1M versus $2.5/1M. Input prices and retry rates still move the real bill.
Which is faster, Seed 2.1 Turbo or ByteDance: UI-TARS 7B ?: We do not have TTFT for both models.
Which has the larger context window?: Seed 2.1 Turbo accepts 262k tokens versus 128k.
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. Seed 2.1 Turbo and ByteDance: UI-TARS 7B Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All Seed 2.1 Turbo matchups →|All ByteDance: UI-TARS 7B matchups →

Doubao Pro 1.5 vs Seed 2.1 Turbo Yi-Lightning vs Seed 2.1 Turbo Mistral Large 3 vs Seed 2.1 Turbo Gemini 2.0 Flash Thinking vs Seed 2.1 Turbo Gemini 3 Flash vs Seed 2.1 Turbo Doubao Lite 1.5 vs Seed 2.1 Turbo

Seed 2.1 Turbo vs ByteDance: UI-TARS 7B benchmark

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Seed 2.1 Turbo (8)vsByteDance: UI-TARS 7B (2)

Seed 2.1 Turbo: 8W (80%)Overall: Seed 2.1 TurboByteDance: UI-TARS 7B : 2W (20%)

← Seed 2.1 TurboByteDance: UI-TARS 7B →

Seed 2.1 Turbo (5/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo

1,472vs—

Coding Elo

1,480vs—

SWE-bench

63.2%vs—

LiveBench

64.8%vs—

GPQA Diamond

76.8%vs—

Seed 2.1 Turbo: 5WByteDance: UI-TARS 7B : 0W

Seed 2.1 Turbo (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

160 tok/svs—

Time to first token

120 msvs—

Seed 2.1 Turbo: 2WByteDance: UI-TARS 7B : 0W

ByteDance: UI-TARS 7B (2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$2.5/1Mvs$0.2/1M

Input price

$0.5/1Mvs$0.1/1M

Context window

262kvs128k

Seed 2.1 Turbo: 1WByteDance: UI-TARS 7B : 2W

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatByteDance: UI-TARS 7B

Lower output list price ($0.2/1M).

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGSeed 2.1 Turbo

Larger window (262k).

Screenshots / visionSeed 2.1 Turbo

Seed 2.1 Turbo 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	ByteDance: UI-TARS 7B	Lower output list price ($0.2/1M).
Voice / low-latency UI	insufficient data	Need TTFT on both sides.
Long-document RAG	Seed 2.1 Turbo	Larger window (262k).
Screenshots / vision	Seed 2.1 Turbo	Seed 2.1 Turbo is the side marked multimodal in the catalog.

Frequently Asked Questions

Which is better overall, Seed 2.1 Turbo or ByteDance: UI-TARS 7B ?

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, Seed 2.1 Turbo or ByteDance: UI-TARS 7B ?

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?

ByteDance: UI-TARS 7B output tokens are $0.2/1M versus $2.5/1M. Input prices and retry rates still move the real bill.

Which is faster, Seed 2.1 Turbo or ByteDance: UI-TARS 7B ?

We do not have TTFT for both models.

Which has the larger context window?

Seed 2.1 Turbo accepts 262k tokens versus 128k.

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. Seed 2.1 Turbo and ByteDance: UI-TARS 7B Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Doubao Series Family (3 models)

Swap or Add Any Model to this Matchup

Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

No shared data

No shared data

ByteDance: UI-TARS 7B

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Seed 2.1 Turbo (Aug 10): ByteDance’s API drop on the public timeline

Cast Your Matchup Vote

Community Discussions (0)

Share card

CompareLLM Matrix

Seed 2.1 Turbo

ByteDance: UI-TARS 7B

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons

Doubao Series Family (3 models)

Swap or Add Any Model to this Matchup

Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

No shared data

No shared data

ByteDance: UI-TARS 7B

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Seed 2.1 Turbo (Aug 10): ByteDance’s API drop on the public timeline

Cast Your Matchup Vote

Community Discussions (0)

Share card

CompareLLM Matrix

Seed 2.1 Turbo

ByteDance: UI-TARS 7B

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons