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  3. DeepSeek V4 Flash vs Poolside: Laguna XS 2.1

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

DeepSeek V4 Flash vs Poolside: Laguna XS 2.1 benchmark

In this head-to-head showdown, Poolside: Laguna XS 2.1 is more budget-friendly at $0.12/1M per 1M output tokens. Review the complete breakdown below to determine which model best fits your performance and budget requirements.

Executive Comparison Verdict

Bottom Line: Choose DeepSeek V4 Flash if your priority is peak reasoning, complex code generation, and top preference Elo. Choose Poolside: Laguna XS 2.1 if you are optimizing for low latency, high throughput, and cost-efficient API deployment.
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Executive Verdict Summary

Poolside: Laguna XS 2.1 holds empirical advantage (2 of 3 metrics)

Coding / SWESWE-bench
DeepSeek V4 FlashTop code solve rate
ReasoningGPQA / Live
DeepSeek V4 FlashTop logical accuracy
Best Value$/1M Tok
Poolside: Laguna XS 2.1Lowest API billing cost
Speed / TokTok/Sec
DeepSeek V4 FlashFastest stream rate

Verified Advantage Breakdown

3 benchmarks evaluated across capability, speed, and cost

DeepSeek V4 Flash (1)Poolside: Laguna XS 2.1 (2)
DeepSeek V4 Flash
1 of 3 Wins
✓Context window
Poolside: Laguna XS 2.1
2 of 3 Wins
✓Input price✓Output price
DeepSeek
Leads 1 of 3
DeepSeek V4 Flash

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

V4 Flash SpeedElo 1,490In: $0.14 · Out: $0.28/1M
poolside
Leads 2 of 3
Poolside: Laguna XS 2.1

Auto-discovered from OpenRouter (poolside/laguna-xs-2.1). Preview until a second source matches.

In: $0.06 · Out: $0.12/1M

DeepSeek V4 Series Lineage & Sibling Variants

2 models

Currently comparing DeepSeek V4 Flash vs Poolside: Laguna XS 2.1. Alternative family tiers available.

Active: DeepSeek V4 Flash
DeepSeek V4 Pro$3.96
Top Rival Showdowns for DeepSeek V4 Flash
All Matchups
Compare vs:vs Claude Opus 4.5vs GPT-5vs Gemini 3 Provs Grok 4.6vs Qwen 3 Max
Preference Leader

No shared data

Single model data

Throughput Leader

No shared data

No latency data

Value per Dollar LeaderPoolside: Laguna XS 2.1 Wins

Poolside: Laguna XS 2.1

$0.12 / 1M output

Capability Percentiles

Relative percentile scores computed across all active models in the benchmark catalog.

Multi-Dimensional Capability Radar

Leaders Matchup Capability Radar

Comparing top standard models across 6 key capability dimensions. Tap any spoke or dot to inspect.

Tap any node to inspect
0–100 %ile

Overall Matchup Breakdown

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

DeepSeek V4 Flash (8)vsPoolside: Laguna XS 2.1 (2)
DeepSeek V4 Flash: 8W (80%)Overall: DeepSeek V4 FlashPoolside: Laguna XS 2.1: 2W (20%)
← DeepSeek V4 FlashPoolside: Laguna XS 2.1 →
🏆DeepSeek V4 Flash Leads(5/5)

Intelligence & Reasoning

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

Benchmark
DeepSeek V4 FlashvsPoolside: Laguna XS 2.1
Preference Elo
1,490vs—
Coding Elo
1,516vs—
SWE-bench
71.2%vs—
LiveBench
67.8%vs—
GPQA Diamond
81.6%vs—
DeepSeek V4 Flash: 5WPoolside: Laguna XS 2.1: 0W
🏆DeepSeek V4 Flash Leads(2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Benchmark
DeepSeek V4 FlashvsPoolside: Laguna XS 2.1
Output speed
142 tok/svs—
Time to first token
165 msvs—
DeepSeek V4 Flash: 2WPoolside: Laguna XS 2.1: 0W
🏆Poolside: Laguna XS 2.1 Leads(2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Benchmark
DeepSeek V4 FlashvsPoolside: Laguna XS 2.1
Output price
$0.28/1Mvs$0.12/1M+$0.16/1M
Input price
$0.14/1Mvs$0.06/1M+$0.08/1M
Context window
1.3Mvs262k+1M
DeepSeek V4 Flash: 1WPoolside: Laguna XS 2.1: 2W

Side-by-Side Benchmark Matrix

DeepSeek V4 FlashPoolside: Laguna XS 2.1
Preference Elo
DeepSeek V4 Flash1,490
Poolside: Laguna XS 2.1—
Coding Elo
DeepSeek V4 Flash1,516
Poolside: Laguna XS 2.1—
LiveBench
DeepSeek V4 Flash67.8%
Poolside: Laguna XS 2.1—
SWE-bench
DeepSeek V4 Flash71.2%
Poolside: Laguna XS 2.1—
GPQA Diamond
DeepSeek V4 Flash81.6%
Poolside: Laguna XS 2.1—
Time to first token
DeepSeek V4 Flash165 ms
Poolside: Laguna XS 2.1—
Output speed
DeepSeek V4 Flash142 tok/s
Poolside: Laguna XS 2.1—
Input pricePoolside: Laguna XS 2.1 +$0.08/1M
DeepSeek V4 Flash$0.14/1M
Poolside: Laguna XS 2.1$0.06/1M
Output pricePoolside: Laguna XS 2.1 +$0.16/1M
DeepSeek V4 Flash$0.28/1M
Poolside: Laguna XS 2.1$0.12/1M
Context windowDeepSeek V4 Flash +1M
DeepSeek V4 Flash1.3M
Poolside: Laguna XS 2.1262k
BenchmarkDeepSeek V4 FlashPoolside: Laguna XS 2.1Advantage Delta
Preference Elo
1,490
lmarena · Aug 16, 2026
——
Coding Elo
1,516
lmarena · Aug 16, 2026
——
LiveBench
67.8%
livebench · Aug 16, 2026
——
SWE-bench
71.2%
swebench · Aug 16, 2026
——
GPQA Diamond
81.6%
seed-bootstrap · Aug 16, 2026
——
Time to first token
165 ms
seed-bootstrap · Aug 16, 2026
——
Output speed
142 tok/s
seed-bootstrap · Aug 16, 2026
——
Input price
$0.14/1M
openrouter · Aug 17, 2026
$0.06/1M
openrouter · Aug 17, 2026
+$0.08/1M
Output price
$0.28/1M
openrouter · Aug 17, 2026
$0.12/1M
openrouter · Aug 17, 2026
+$0.16/1M
Context window
1.3M
openrouter · Aug 17, 2026
262k
openrouter · Aug 17, 2026
+1M

Workload Cost & Savings Calculator

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

Save 57% with Poolside: Laguna XS 2.1
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: $4.9Out: $4.2
Poolside: Laguna XS 2.1$3.90 / mo
In: $2.1Out: $1.8
Estimated Cost Delta

Poolside: Laguna XS 2.1 is estimated to save $5.20/month ($62/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

  • 1
    Poolside: Laguna XS 2.1:Pick Poolside: Laguna XS 2.1 when you are optimizing output cost.
  • 2
    DeepSeek V4 Flash:Pick DeepSeek V4 Flash for million-token RAG or long-document jobs.

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatPoolside: Laguna XS 2.1

Lower output list price ($0.12/1M).

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGDeepSeek V4 Flash

Larger window (1.3M).

Screenshots / visionPoolside: Laguna XS 2.1

Poolside: Laguna XS 2.1 is the side marked multimodal in the catalog.

Target WorkloadRecommended PickEvaluation Rationale
Repo / coding agentsinsufficient dataNeed SWE-bench on both sides.
High-volume chatPoolside: Laguna XS 2.1Lower output list price ($0.12/1M).
Voice / low-latency UIinsufficient dataNeed TTFT on both sides.
Long-document RAGDeepSeek V4 FlashLarger window (1.3M).
Screenshots / visionPoolside: Laguna XS 2.1Poolside: Laguna XS 2.1 is the side marked multimodal in the catalog.

Related Editorial Dispatches & Benchmark Notes

View all news
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.

Cast Your Matchup Vote

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CompareLLM AI Matrix

Verified Head-to-Head Telemetry

LIVE BENCHMARK
VS
DeepSeek

DeepSeek V4 Flash

Elo 1,490
SWE-bench71.2%
Speed (tok/s)142 tok/s
Input / 1M Tokens$0.14/1M
Output / 1M Tokens$0.28/1M
poolside

Poolside: Laguna XS 2.1

Elo n/a
SWE-bench—
Speed (tok/s)262k
Input / 1M Tokens$0.06/1M
Output / 1M Tokens$0.12/1M

Frequently Asked Questions

Which is better overall, DeepSeek V4 Flash or Poolside: Laguna XS 2.1?
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, DeepSeek V4 Flash or Poolside: Laguna XS 2.1?
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?
Poolside: Laguna XS 2.1 output tokens are $0.12/1M versus $0.28/1M. Input prices and retry rates still move the real bill.
Which is faster, DeepSeek V4 Flash or Poolside: Laguna XS 2.1?
We do not have TTFT for both models.
Which has the larger context window?
DeepSeek V4 Flash accepts 1.3M tokens versus 262k.
Can I self-host either model?
DeepSeek V4 Flash is marked open-weights in our catalog. The other side is a closed API. Check the provider license before you ship weights.
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 Poolside: Laguna XS 2.1 Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Related news

  • price · Jul 31, 2026

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

Similar Head-to-Head Comparisons

All DeepSeek V4 Flash matchups →|All Poolside: Laguna XS 2.1 matchups →
DeepSeek V4 Flash vs DeepSeek V4 Pro (previous deepseek)Gemini 2.0 Flash Thinking vs DeepSeek V4 FlashGLM-5.2 vs DeepSeek V4 FlashGemini 3 Flash vs DeepSeek V4 FlashQwen QwQ 32B vs DeepSeek V4 FlashMiniMax M2.5 vs DeepSeek V4 Flash