Pairwise benchmark snapshot · Aug 16, 2026

DeepSeek V4 Flash vs Qwen3.8 27B benchmark

Name: DeepSeek V4 Flash vs Qwen3.8 27B AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

This page compares DeepSeek V4 Flash (DeepSeek) and Qwen3.8 27B (Alibaba) using the latest snapshots we have as of Aug 16, 2026. On preference Elo, DeepSeek V4 Flash is ahead by 92 points (1,490 vs 1,398; seed-bootstrap (Aug 16, 2026)). On SWE-bench coding, DeepSeek V4 Flash resolves 71.2% versus 58.8% (seed-bootstrap (Aug 16, 2026)). Qwen3.8 27B streams faster (152 tok/s) while DeepSeek V4 Flash is the cheaper output token ($0.28/1M). DeepSeek V4 Flash has the larger context window (1M 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.

Share Analysis:

WhatsApp Telegram X / Post LinkedIn Reddit

DeepSeek

DeepSeek V4 Flash

DeepSeek Jul 31 2026 price-performance SKU. Public listings put it near $0.14/$0.28 per 1M tokens.

Elo 1,490$0.28/1M out

Alibaba

Qwen3.8 27B

Alibaba open-weight 27B drop dated Aug 14 2026. Dense enough to self-host; not a frontier MoE.

Elo 1,398$3.1999999999999997/1M out

Swap or Add Any Model to this Matchup

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.

DeepSeek V4 Flash (8)vsQwen3.8 27B (2)

DeepSeek V4 Flash: 8W (80%)Overall: DeepSeek V4 FlashQwen3.8 27B: 2W (20%)

← DeepSeek V4 FlashQwen3.8 27B →

DeepSeek V4 Flash (5/5)

Intelligence & Reasoning

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

Preference Elo

1,490vs1,398

Coding Elo

1,516vs1,422

SWE-bench

71.2%vs58.8%

LiveBench

67.8%vs60.6%

GPQA Diamond

81.6%vs73.4%

DeepSeek V4 Flash: 5WQwen3.8 27B: 0W

Qwen3.8 27B (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

142 tok/svs152 tok/s

Time to first token

165 msvs140 ms

DeepSeek V4 Flash: 0WQwen3.8 27B: 2W

DeepSeek V4 Flash (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$0.28/1Mvs$3.2/1M

Input price

$0.14/1Mvs$0.45/1M

Context window

1Mvs262k

DeepSeek V4 Flash: 3WQwen3.8 27B: 0W

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 AdvantageDeepSeek V4 Flash 5/6

Preference Elo

DeepSeek V4 Flash

92 pts advantage

Throughput Speed

Qwen3.8 27B

10 tok/s faster

Price Efficiency

DeepSeek V4 Flash

$2.92/1M cheaper

Full Benchmark Score Matrix

—

Elo

High is better

+7%1,490

EloHigh is better

1,398

Code Elo

High is better

+7%1,516

Code EloHigh is better

1,422

LiveBench

High is better

+12%67.8%

LiveBenchHigh is better

60.6%

SWE-bench

High is better

+21%71.2%

SWE-benchHigh is better

58.8%

GPQA

High is better

+11%81.6%

GPQAHigh is better

73.4%

TTFT

Low is better

165 ms

TTFTLow is better

140 ms+18%

Speed

High is better

142 tok/s

SpeedHigh is better

152 tok/s+7%

In $

Low is better

+221%$0.14/1M

In $Low is better

$0.45/1M

Out $

Low is better

+1043%$0.28/1M

Out $Low is better

$3.2/1M

Context

High is better

+300%1M

ContextHigh is better

262k

Interactive Simulator

Workload Cost & Savings Calculator

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

Save up to 86% with DeepSeek V4 Flash

Monthly Volume50M tokens/mo

Quick Presets:

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

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

DeepSeek V4 Flash$9.10 / mo

In: $4.90Out: $4.20

Qwen3.8 27B$63.75 / mo

In: $15.75Out: $48.00

Estimated Cost Delta

DeepSeek V4 Flash is estimated to save $54.65/month ($656/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

1
DeepSeek V4 Flash:Pick DeepSeek V4 Flash when repo-level coding accuracy is the constraint.
2
Qwen3.8 27B:Pick Qwen3.8 27B when time-to-first-token matters more than peak Elo.
3
DeepSeek V4 Flash:Pick DeepSeek V4 Flash for million-token RAG or long-document jobs.

Recommended Workload Routing

Repo / coding agentsDeepSeek V4 Flash

Higher SWE-bench (71.2%).

High-volume chatDeepSeek V4 Flash

Lower output list price ($0.28/1M).

Voice / low-latency UIQwen3.8 27B

Lower TTFT (140 ms).

Long-document RAGDeepSeek V4 Flash

Larger window (1M).

Screenshots / visionDeepSeek V4 Flash

DeepSeek V4 Flash is the side marked multimodal in the catalog.

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	DeepSeek V4 Flash	Higher SWE-bench (71.2%).
High-volume chat	DeepSeek V4 Flash	Lower output list price ($0.28/1M).
Voice / low-latency UI	Qwen3.8 27B	Lower TTFT (140 ms).
Long-document RAG	DeepSeek V4 Flash	Larger window (1M).
Screenshots / vision	DeepSeek V4 Flash	DeepSeek V4 Flash is the side marked multimodal in the catalog.

Related Editorial Dispatches & Benchmark Notes

View all news

launchAug 14, 2026

Qwen3.8 27B (Aug 14): dense enough to self-host, not a frontier MoE

Alibaba open-weight 27B drop. Local/open-weight lists should see it. It will not win frontier-agents.

priceJul 31, 2026

DeepSeek V4 Flash (Jul 31): the $0.14/$0.28 price-performance SKU

Public listings put Flash near $0.14/$0.28 per 1M. That is a batch SKU, not a chatbot crown.

Community Sentiment

Cast Your Matchup Vote

0 total votes

Community Discussions (0)

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

Share card

The real PNG is generated at /compare/deepseek-v4-flash-vs-qwen-3-8-27b/opengraph-image for crawlers.

PNG

CompareLLM Matrix

Verified head-to-head card

LIVE

DeepSeek

DeepSeek V4 Flash

Elo 1,490

LiveBench67.8%

SWE-bench71.2%

Speed142 tok/s

Output cost$0.28/1M

Alibaba

Qwen3.8 27B

Elo 1,398

LiveBench60.6%

SWE-bench58.8%

Speed152 tok/s

Output cost$3.2/1M

Frequently Asked Questions

Which is better overall, DeepSeek V4 Flash or Qwen3.8 27B?: DeepSeek V4 Flash has the higher preference Elo in our latest snapshot (1,490). “Better” still depends on coding, price, and latency — see the table.
Which is better at coding, DeepSeek V4 Flash or Qwen3.8 27B?: DeepSeek V4 Flash leads SWE-bench at 71.2% vs 58.8%. SWE-bench is one harness, not your repo.
Which is cheaper to run in production?: DeepSeek V4 Flash output tokens are $0.28/1M versus $3.2/1M. Input prices and retry rates still move the real bill.
Which is faster, DeepSeek V4 Flash or Qwen3.8 27B?: Qwen3.8 27B has the lower time-to-first-token (140 ms vs 165 ms). Tokens/sec is a separate column if you care about long completions.
Which has the larger context window?: DeepSeek V4 Flash accepts 1M tokens versus 262k.
Can I self-host either model?: Both DeepSeek V4 Flash and Qwen3.8 27B are marked open-weights. Hosting cost is not in this table.
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. DeepSeek V4 Flash and Qwen3.8 27B Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All DeepSeek V4 Flash matchups →|All Qwen3.8 27B matchups →

DeepSeek V4 Flash vs DeepSeek V4 Pro (previous deepseek)Qwen3.8 27B vs Qwen 3 Max (previous qwen)Qwen QwQ 32B vs DeepSeek V4 Flash Qwen 3 Max vs DeepSeek V4 Flash Qwen3 235B vs Qwen3.8 27B Qwen 2.5 Coder 32B vs Qwen3.8 27B

DeepSeek V4 Flash vs Qwen3.8 27B benchmark

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

DeepSeek V4 Flash (8)vsQwen3.8 27B (2)

DeepSeek V4 Flash: 8W (80%)Overall: DeepSeek V4 FlashQwen3.8 27B: 2W (20%)

← DeepSeek V4 FlashQwen3.8 27B →

DeepSeek V4 Flash (5/5)

Intelligence & Reasoning

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

Preference Elo

1,490vs1,398

Coding Elo

1,516vs1,422

SWE-bench

71.2%vs58.8%

LiveBench

67.8%vs60.6%

GPQA Diamond

81.6%vs73.4%

DeepSeek V4 Flash: 5WQwen3.8 27B: 0W

Qwen3.8 27B (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

142 tok/svs152 tok/s

Time to first token

165 msvs140 ms

DeepSeek V4 Flash: 0WQwen3.8 27B: 2W

DeepSeek V4 Flash (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$0.28/1Mvs$3.2/1M

Input price

$0.14/1Mvs$0.45/1M

Context window

1Mvs262k

DeepSeek V4 Flash: 3WQwen3.8 27B: 0W

Recommended Workload Routing

Repo / coding agentsDeepSeek V4 Flash

Higher SWE-bench (71.2%).

High-volume chatDeepSeek V4 Flash

Lower output list price ($0.28/1M).

Voice / low-latency UIQwen3.8 27B

Lower TTFT (140 ms).

Long-document RAGDeepSeek V4 Flash

Larger window (1M).

Screenshots / visionDeepSeek V4 Flash

DeepSeek V4 Flash is the side marked multimodal in the catalog.

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	DeepSeek V4 Flash	Higher SWE-bench (71.2%).
High-volume chat	DeepSeek V4 Flash	Lower output list price ($0.28/1M).
Voice / low-latency UI	Qwen3.8 27B	Lower TTFT (140 ms).
Long-document RAG	DeepSeek V4 Flash	Larger window (1M).
Screenshots / vision	DeepSeek V4 Flash	DeepSeek V4 Flash is the side marked multimodal in the catalog.

Frequently Asked Questions

Which is better overall, DeepSeek V4 Flash or Qwen3.8 27B?

DeepSeek V4 Flash has the higher preference Elo in our latest snapshot (1,490). “Better” still depends on coding, price, and latency — see the table.

Which is better at coding, DeepSeek V4 Flash or Qwen3.8 27B?

DeepSeek V4 Flash leads SWE-bench at 71.2% vs 58.8%. SWE-bench is one harness, not your repo.

Which is cheaper to run in production?

DeepSeek V4 Flash output tokens are $0.28/1M versus $3.2/1M. Input prices and retry rates still move the real bill.

Which is faster, DeepSeek V4 Flash or Qwen3.8 27B?

Qwen3.8 27B has the lower time-to-first-token (140 ms vs 165 ms). Tokens/sec is a separate column if you care about long completions.

Which has the larger context window?

DeepSeek V4 Flash accepts 1M tokens versus 262k.

Can I self-host either model?

Both DeepSeek V4 Flash and Qwen3.8 27B are marked open-weights. Hosting cost is not in this table.

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. DeepSeek V4 Flash and Qwen3.8 27B 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

DeepSeek V4 Flash

Qwen3.8 27B

DeepSeek V4 Flash

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Qwen3.8 27B (Aug 14): dense enough to self-host, not a frontier MoE

DeepSeek V4 Flash (Jul 31): the $0.14/$0.28 price-performance SKU

Cast Your Matchup Vote

Community Discussions (0)

Share card

CompareLLM Matrix

DeepSeek V4 Flash

Qwen3.8 27B

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

DeepSeek V4 Flash

Qwen3.8 27B

DeepSeek V4 Flash

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Qwen3.8 27B (Aug 14): dense enough to self-host, not a frontier MoE

DeepSeek V4 Flash (Jul 31): the $0.14/$0.28 price-performance SKU

Cast Your Matchup Vote

Community Discussions (0)

Share card

CompareLLM Matrix

DeepSeek V4 Flash

Qwen3.8 27B

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons