Pairwise benchmark snapshot · Aug 16, 2026

Doubao Lite 1.5 vs Seed 2.1 Turbo benchmark

Name: Doubao Lite 1.5 vs Seed 2.1 Turbo AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

This page compares Doubao Lite 1.5 (ByteDance) and Seed 2.1 Turbo (ByteDance) using the latest snapshots we have as of Aug 16, 2026. On preference Elo, Seed 2.1 Turbo is ahead by 112 points (1,472 vs 1,360; seed-bootstrap (Aug 16, 2026)). On SWE-bench coding, Seed 2.1 Turbo resolves 63.2% versus 46% (seed-bootstrap (Aug 16, 2026)). Doubao Lite 1.5 streams faster (180 tok/s) while Doubao Lite 1.5 is the cheaper output token ($0.1/1M). 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

Doubao Lite 1.5

ByteDance high-speed lightweight model priced at sub-cent levels.

Elo 1,360$0.1/1M out

ByteDance

Seed 2.1 Turbo

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

Elo 1,472$2.5/1M out

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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.

Doubao Lite 1.5 (4)vsSeed 2.1 Turbo (6)

Doubao Lite 1.5: 4W (40%)Overall: Seed 2.1 TurboSeed 2.1 Turbo: 6W (60%)

← Doubao Lite 1.5Seed 2.1 Turbo →

Seed 2.1 Turbo (5/5)

Intelligence & Reasoning

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

Preference Elo

1,360vs1,472

Coding Elo

1,320vs1,480

SWE-bench

46%vs63.2%

LiveBench

54%vs64.8%

GPQA Diamond

64.2%vs76.8%

Doubao Lite 1.5: 0WSeed 2.1 Turbo: 5W

Doubao Lite 1.5 (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

180 tok/svs160 tok/s

Time to first token

110 msvs120 ms

Doubao Lite 1.5: 2WSeed 2.1 Turbo: 0W

Doubao Lite 1.5 (2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$0.1/1Mvs$2.5/1M

Input price

$0.04/1Mvs$0.5/1M

Context window

33kvs262k

Doubao Lite 1.5: 2WSeed 2.1 Turbo: 1W

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 4/6

Preference Elo

Seed 2.1 Turbo

112 pts advantage

Throughput Speed

Doubao Lite 1.5

20 tok/s faster

Price Efficiency

Doubao Lite 1.5

$2.40/1M cheaper

Full Benchmark Score Matrix

—

Elo

High is better

1,360

EloHigh is better

1,472+8%

Code Elo

High is better

1,320

Code EloHigh is better

1,480+12%

LiveBench

High is better

54%

LiveBenchHigh is better

64.8%+20%

SWE-bench

High is better

46%

SWE-benchHigh is better

63.2%+37%

GPQA

High is better

64.2%

GPQAHigh is better

76.8%+20%

TTFT

Low is better

+9%110 ms

TTFTLow is better

120 ms

Speed

High is better

+13%180 tok/s

SpeedHigh is better

160 tok/s

In $

Low is better

+1150%$0.04/1M

In $Low is better

$0.5/1M

Out $

Low is better

+2400%$0.1/1M

Out $Low is better

$2.5/1M

Context

High is better

33k

ContextHigh is better

262k+700%

Interactive Simulator

Workload Cost & Savings Calculator

Simulate monthly production API costs based on published $/1M tokens.

Save up to 95% with Doubao Lite 1.5

Monthly Volume50M tokens/mo

Quick Presets:

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

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

Doubao Lite 1.5$2.90 / mo

In: $1.40Out: $1.50

Seed 2.1 Turbo$55.00 / mo

In: $17.50Out: $37.50

Estimated Cost Delta

Doubao Lite 1.5 is estimated to save $52.10/month ($625/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

1
Seed 2.1 Turbo:Pick Seed 2.1 Turbo when repo-level coding accuracy is the constraint.
2
Doubao Lite 1.5:Pick Doubao Lite 1.5 when you are optimizing output cost.
3
Doubao Lite 1.5:Pick Doubao Lite 1.5 when time-to-first-token matters more than peak Elo.

Recommended Workload Routing

Repo / coding agentsSeed 2.1 Turbo

Higher SWE-bench (63.2%).

High-volume chatDoubao Lite 1.5

Lower output list price ($0.1/1M).

Voice / low-latency UIDoubao Lite 1.5

Lower TTFT (110 ms).

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	Seed 2.1 Turbo	Higher SWE-bench (63.2%).
High-volume chat	Doubao Lite 1.5	Lower output list price ($0.1/1M).
Voice / low-latency UI	Doubao Lite 1.5	Lower TTFT (110 ms).
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.

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LIVE

ByteDance

Doubao Lite 1.5

Elo 1,360

LiveBench54%

SWE-bench46%

Speed180 tok/s

Output cost$0.1/1M

ByteDance

Seed 2.1 Turbo

Elo 1,472

LiveBench64.8%

SWE-bench63.2%

Speed160 tok/s

Output cost$2.5/1M

Frequently Asked Questions

Which is better overall, Doubao Lite 1.5 or Seed 2.1 Turbo?: Seed 2.1 Turbo has the higher preference Elo in our latest snapshot (1,472). “Better” still depends on coding, price, and latency — see the table.
Which is better at coding, Doubao Lite 1.5 or Seed 2.1 Turbo?: Seed 2.1 Turbo leads SWE-bench at 63.2% vs 46%. SWE-bench is one harness, not your repo.
Which is cheaper to run in production?: Doubao Lite 1.5 output tokens are $0.1/1M versus $2.5/1M. Input prices and retry rates still move the real bill.
Which is faster, Doubao Lite 1.5 or Seed 2.1 Turbo?: Doubao Lite 1.5 has the lower time-to-first-token (110 ms vs 120 ms). Tokens/sec is a separate column if you care about long completions.
Which has the larger context window?: Seed 2.1 Turbo accepts 262k tokens versus 33k.
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. Doubao Lite 1.5 and Seed 2.1 Turbo Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All Doubao Lite 1.5 matchups →|All Seed 2.1 Turbo matchups →

Doubao Lite 1.5 vs Doubao Pro 1.5 (next seed)Seed 2.1 Turbo vs Doubao Pro 1.5 (previous seed)Mistral Large 3 vs Seed 2.1 Turbo Yi-Lightning 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 benchmark

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Doubao Lite 1.5 (4)vsSeed 2.1 Turbo (6)

Doubao Lite 1.5: 4W (40%)Overall: Seed 2.1 TurboSeed 2.1 Turbo: 6W (60%)

← Doubao Lite 1.5Seed 2.1 Turbo →

Seed 2.1 Turbo (5/5)

Intelligence & Reasoning

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

Preference Elo

1,360vs1,472

Coding Elo

1,320vs1,480

SWE-bench

46%vs63.2%

LiveBench

54%vs64.8%

GPQA Diamond

64.2%vs76.8%

Doubao Lite 1.5: 0WSeed 2.1 Turbo: 5W

Doubao Lite 1.5 (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

180 tok/svs160 tok/s

Time to first token

110 msvs120 ms

Doubao Lite 1.5: 2WSeed 2.1 Turbo: 0W

Doubao Lite 1.5 (2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$0.1/1Mvs$2.5/1M

Input price

$0.04/1Mvs$0.5/1M

Context window

33kvs262k

Doubao Lite 1.5: 2WSeed 2.1 Turbo: 1W

Recommended Workload Routing

Repo / coding agentsSeed 2.1 Turbo

Higher SWE-bench (63.2%).

High-volume chatDoubao Lite 1.5

Lower output list price ($0.1/1M).

Voice / low-latency UIDoubao Lite 1.5

Lower TTFT (110 ms).

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	Seed 2.1 Turbo	Higher SWE-bench (63.2%).
High-volume chat	Doubao Lite 1.5	Lower output list price ($0.1/1M).
Voice / low-latency UI	Doubao Lite 1.5	Lower TTFT (110 ms).
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, Doubao Lite 1.5 or Seed 2.1 Turbo?

Seed 2.1 Turbo has the higher preference Elo in our latest snapshot (1,472). “Better” still depends on coding, price, and latency — see the table.

Which is better at coding, Doubao Lite 1.5 or Seed 2.1 Turbo?

Seed 2.1 Turbo leads SWE-bench at 63.2% vs 46%. SWE-bench is one harness, not your repo.

Which is cheaper to run in production?

Doubao Lite 1.5 output tokens are $0.1/1M versus $2.5/1M. Input prices and retry rates still move the real bill.

Which is faster, Doubao Lite 1.5 or Seed 2.1 Turbo?

Doubao Lite 1.5 has the lower time-to-first-token (110 ms vs 120 ms). Tokens/sec is a separate column if you care about long completions.

Which has the larger context window?

Seed 2.1 Turbo accepts 262k tokens versus 33k.

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. Doubao Lite 1.5 and Seed 2.1 Turbo Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

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

Seed 2.1 Turbo

Doubao Lite 1.5

Doubao Lite 1.5

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)

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CompareLLM Matrix

Doubao Lite 1.5

Seed 2.1 Turbo

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons

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

Seed 2.1 Turbo

Doubao Lite 1.5

Doubao Lite 1.5

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

Doubao Lite 1.5

Seed 2.1 Turbo

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons