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Every score has a dated snapshot.

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  3. Gemini 2.5 Flash vs Poolside: Laguna XS 2.1

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

Gemini 2.5 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 Gemini 2.5 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
Gemini 2.5 FlashTop code solve rate
ReasoningGPQA / Live
Gemini 2.5 FlashTop logical accuracy
Best Value$/1M Tok
Poolside: Laguna XS 2.1Lowest API billing cost
Speed / TokTok/Sec
Gemini 2.5 FlashFastest stream rate

Verified Advantage Breakdown

3 benchmarks evaluated across capability, speed, and cost

Gemini 2.5 Flash (1)Poolside: Laguna XS 2.1 (2)
Gemini 2.5 Flash
1 of 3 Wins
✓Context window
Poolside: Laguna XS 2.1
2 of 3 Wins
✓Input price✓Output price
Google
Leads 1 of 3
Gemini 2.5 Flash

Previous Google speed workhorse.

2.5 FlashElo 1,295In: $0.3 · Out: $2.5/1M
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

Gemini 2.5 Series Lineage & Sibling Variants

2 models

Currently comparing Gemini 2.5 Flash vs Poolside: Laguna XS 2.1. Alternative family tiers available.

Active: Gemini 2.5 Flash
Gemini 2.5 Pro$10
Top Rival Showdowns for Gemini 2.5 Flash
All Matchups
Compare vs:vs Claude Opus 4.5vs GPT-5vs Grok 4.6vs DeepSeek V4 Provs 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.

Gemini 2.5 Flash (7)vsPoolside: Laguna XS 2.1 (2)
Gemini 2.5 Flash: 7W (78%)Overall: Gemini 2.5 FlashPoolside: Laguna XS 2.1: 2W (22%)
← Gemini 2.5 FlashPoolside: Laguna XS 2.1 →
🏆Gemini 2.5 Flash Leads(4/5)

Intelligence & Reasoning

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

Benchmark
Gemini 2.5 FlashvsPoolside: Laguna XS 2.1
Preference Elo
1,295vs—
Coding Elo
—vs—
SWE-bench
48%vs—
LiveBench
51.4%vs—
GPQA Diamond
68.2%vs—
Gemini 2.5 Flash: 4WPoolside: Laguna XS 2.1: 0W
🏆Gemini 2.5 Flash Leads(2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Benchmark
Gemini 2.5 FlashvsPoolside: Laguna XS 2.1
Output speed
185 tok/svs—
Time to first token
110 msvs—
Gemini 2.5 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
Gemini 2.5 FlashvsPoolside: Laguna XS 2.1
Output price
$2.5/1Mvs$0.12/1M+$2.38/1M
Input price
$0.3/1Mvs$0.06/1M+$0.24/1M
Context window
1Mvs262k+786k
Gemini 2.5 Flash: 1WPoolside: Laguna XS 2.1: 2W

Side-by-Side Benchmark Matrix

Gemini 2.5 FlashPoolside: Laguna XS 2.1
Preference Elo
Gemini 2.5 Flash1,295
Poolside: Laguna XS 2.1—
LiveBench
Gemini 2.5 Flash51.4%
Poolside: Laguna XS 2.1—
SWE-bench
Gemini 2.5 Flash48%
Poolside: Laguna XS 2.1—
GPQA Diamond
Gemini 2.5 Flash68.2%
Poolside: Laguna XS 2.1—
Time to first token
Gemini 2.5 Flash110 ms
Poolside: Laguna XS 2.1—
Output speed
Gemini 2.5 Flash185 tok/s
Poolside: Laguna XS 2.1—
Input pricePoolside: Laguna XS 2.1 +$0.24/1M
Gemini 2.5 Flash$0.3/1M
Poolside: Laguna XS 2.1$0.06/1M
Output pricePoolside: Laguna XS 2.1 +$2.38/1M
Gemini 2.5 Flash$2.5/1M
Poolside: Laguna XS 2.1$0.12/1M
Context windowGemini 2.5 Flash +786k
Gemini 2.5 Flash1M
Poolside: Laguna XS 2.1262k
BenchmarkGemini 2.5 FlashPoolside: Laguna XS 2.1Advantage Delta
Preference Elo
1,295
lmarena · Aug 17, 2026
——
LiveBench
51.4%
livebench · Aug 17, 2026
——
SWE-bench
48%
swebench · Aug 17, 2026
——
GPQA Diamond
68.2%
seed-bootstrap · Aug 1, 2026
——
Time to first token
110 ms
seed-bootstrap · Aug 1, 2026
——
Output speed
185 tok/s
seed-bootstrap · Aug 1, 2026
——
Input price
$0.3/1M
openrouter · Aug 17, 2026
$0.06/1M
openrouter · Aug 17, 2026
+$0.24/1M
Output price
$2.5/1M
openrouter · Aug 17, 2026
$0.12/1M
openrouter · Aug 17, 2026
+$2.38/1M
Context window
1M
openrouter · Aug 17, 2026
262k
openrouter · Aug 17, 2026
+786k

Workload Cost & Savings Calculator

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

Save 92% 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)
Gemini 2.5 Flash$48.00 / mo
In: $10.5Out: $37.5
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 $44.10/month ($529/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
    Gemini 2.5 Flash:Pick Gemini 2.5 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 RAGGemini 2.5 Flash

Larger window (1M).

Screenshots / visionGemini 2.5 Flash

Gemini 2.5 Flash 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 RAGGemini 2.5 FlashLarger window (1M).
Screenshots / visionGemini 2.5 FlashGemini 2.5 Flash is the side marked multimodal in the catalog.

Related Editorial Dispatches & Benchmark Notes

View all news
launchMar 25, 2025

Gemini 2.5 Flash: previous Google speed workhorse, still a baseline

Useful as a cheap historical compare. 3.7 Flash is the 2026 volume SKU.

Cast Your Matchup Vote

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CompareLLM AI Matrix

Verified Head-to-Head Telemetry

LIVE BENCHMARK
VS
Google

Gemini 2.5 Flash

Elo 1,295
SWE-bench48%
Speed (tok/s)185 tok/s
Input / 1M Tokens$0.3/1M
Output / 1M Tokens$2.5/1M
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, Gemini 2.5 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, Gemini 2.5 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 $2.5/1M. Input prices and retry rates still move the real bill.
Which is faster, Gemini 2.5 Flash or Poolside: Laguna XS 2.1?
We do not have TTFT for both models.
Which has the larger context window?
Gemini 2.5 Flash accepts 1M tokens versus 262k.
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. Gemini 2.5 Flash and Poolside: Laguna XS 2.1 Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Related news

  • launch · Mar 25, 2025

    Gemini 2.5 Flash: previous Google speed workhorse, still a baseline

Similar Head-to-Head Comparisons

All Gemini 2.5 Flash matchups →|All Poolside: Laguna XS 2.1 matchups →
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