Model comparison

DeepSeek V4 Flash (High) vs Laguna S 2.1

Data verified July 21, 2026

Head-to-head evidence from 4 shared benchmark results across 2 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.

DeepSeek V4 Flash (High)

DeepSeek

53.95/100

No comparison

Laguna S 2.1

Poolside

N/A

1 category wins1 category wins

Public leaderboard positions: DeepSeek V4 Flash (High) #92 (Estimated); Laguna S 2.1 unranked (Not scored). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. DeepSeek V4 Flash (High) and Laguna S 2.1 share 4 comparable benchmark results. 2 of 8 categories are comparable. 34 results are unique to DeepSeek V4 Flash (High); 2 to Laguna S 2.1.

Updated July 21, 2026

Shared results: 4
DeepSeek V4 Flash (High) only: 34
Laguna S 2.1 only: 2
Comparable categories: 2 / 8

Treat this as a split decision. DeepSeek V4 Flash (High) makes more sense if coding is the priority; Laguna S 2.1 is the better fit if agentic is the priority or you want the cheaper token bill.

Confidence note. This is a partial-evidence comparison with 4 shared benchmark results across 2 evidence categories; 2 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.

Why this result

DeepSeek V4 Flash (High) and Laguna S 2.1 finish on the same BenchAlign overall score, so this is less about a single winner and more about where the edge shows up. The BenchAlign headline says tie; the benchmark table is where the real choice happens.

DeepSeek V4 Flash (High) is also the more expensive model on tokens at $0.14 input / $0.28 output per 1M tokens, versus $0.10 input / $0.20 output per 1M tokens for Laguna S 2.1.

Category breakdown

Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.

Category scores and score margins for DeepSeek V4 Flash (High) and Laguna S 2.1
Category	DeepSeek V4 Flash (High)	Δ	Laguna S 2.1
Agentic	DeepSeek V4 Flash (High)55.3	Margin→ 14.9	Laguna S 2.170.2
Coding	DeepSeek V4 Flash (High)68.5	Margin← 9.1	Laguna S 2.159.4
Knowledge	DeepSeek V4 Flash (High)52.1	MarginNo overlap	Laguna S 2.1Not measured
Math	DeepSeek V4 Flash (High)91.9	MarginNo overlap	Laguna S 2.1Not measured

Decisive benchmark drivers

The largest measured benchmark gaps in this matchup, with exact reported values.

A · DeepSeek V4 Flash (High)B · Laguna S 2.1

Terminal-Bench 2.0
Agentic
Source ↗
A 56.6%B 70.2%
Winner: Laguna S 2.1Δ 13.6
Terminal-Bench 2.0: DeepSeek V4 Flash (High) scored 56.6%; Laguna S 2.1 scored 70.2%. Laguna S 2.1 wins this benchmark.
SWE-bench Pro
Coding
Source ↗
A 52.3%B 59.4%
Winner: Laguna S 2.1Δ 7.1
SWE-bench Pro: DeepSeek V4 Flash (High) scored 52.3%; Laguna S 2.1 scored 59.4%. Laguna S 2.1 wins this benchmark.

Operational comparison

Runtime and commercial metrics are compared only when both models have a complete sourced value.

Metric	DeepSeek V4 Flash (High)	Laguna S 2.1	Comparison
Input / output priceUSD per 1M tokens	DeepSeek V4 Flash (High)$0.14 input / $0.28 output	Laguna S 2.1$0.1 input / $0.2 output	Laguna S 2.1 has the lower combined listed price.
Generation speedtokens per second	DeepSeek V4 Flash (High)Not available	Laguna S 2.1Not available	A complete speed comparison is not available.
First-answer latencyseconds to first token	DeepSeek V4 Flash (High)Not available	Laguna S 2.1Not available	A complete latency comparison is not available.
Context windowmaximum listed tokens	DeepSeek V4 Flash (High)1M	Laguna S 2.11M	Listed context windows are equal.

Benchmark Deep Dive

AgenticLaguna S 2.1 wins

10 benchmarks

Benchmark	DeepSeek V4 Flash (High)	Laguna S 2.1	Result
Terminal-Bench 2.0Source	56.6%	70.2%	Laguna S 2.1 leads
BrowseCompSource	53.5%	—	Not comparable
HLE w/ toolsSource	40.3%	—	Not comparable
MCP AtlasSource	67.4%	—	Not comparable
ToolathlonSource	43.5%	—	Not comparable
τ²-bench resultsSource	95.6%	—	Not comparable
AA Agentic IndexSource	28.2%	—	Not comparable
GDPval-AASource	32.4%	—	Not comparable
GDPval-AASource	1147	—	Not comparable
Toolathlon-VerifiedSource	—	49.7%	Not comparable

CodingDeepSeek V4 Flash (High) wins

8 benchmarks

Benchmark	DeepSeek V4 Flash (High)	Laguna S 2.1	Result
CodeforcesSource	2816.0	—	Not comparable
SWE-bench VerifiedSource	78.6%	—	Not comparable
SWE-bench ProSource	52.3%	59.4%	Laguna S 2.1 leads
SWE MultilingualSource	70.2%	78.5%	Laguna S 2.1 leads
Terminal-Bench 2.0Source	56.6%	70.2%	Laguna S 2.1 leads
AA-SciCodeSource	42.0%	—	Not comparable
AA Coding IndexSource	52.0%	—	Not comparable
deepSweSource	—	40.4%	Not comparable

Reasoning

4 benchmarks

Benchmark	DeepSeek V4 Flash (High)	Laguna S 2.1	Result
MRCR 1MSource	76.9%	—	Not comparable
CorpusQA 1MSource	59.3%	—	Not comparable
AA-LCRSource	62.7%	—	Not comparable
CritPtSource	3.4%	—	Not comparable

Knowledge

12 benchmarks

Benchmark	DeepSeek V4 Flash (High)	Laguna S 2.1	Result
MMLU-ProSource	86.4%	—	Not comparable
SimpleQASource	28.9%	—	Not comparable
Chinese-SimpleQASource	73.2%	—	Not comparable
GPQASource	87.4%	—	Not comparable
GPQA-DSource	87.4%	—	Not comparable
HLESource	29.4%	—	Not comparable
Artificial Analysis Intelligence IndexSource	37.5%	—	Not comparable
AA-GPQA DiamondSource	86.7%	—	Not comparable
AA-HLESource	27.8%	—	Not comparable
AA-Omniscience IndexSource	-22.3%	—	Not comparable
AA-Omniscience AccuracySource	35.5%	—	Not comparable
AA-Omniscience Hallucination RateSource	89.7%	—	Not comparable

Math

4 benchmarks

Benchmark	DeepSeek V4 Flash (High)	Laguna S 2.1	Result
HMMT Feb 2026Source	91.9%	—	Not comparable
IMOAnswerBenchSource	85.1%	—	Not comparable
ApexSource	19.1%	—	Not comparable
Apex ShortlistSource	72.1%	—	Not comparable

Multimodal

1 benchmarks

Benchmark	DeepSeek V4 Flash (High)	Laguna S 2.1	Result
Design Arena WebsiteSource	1238	—	Not comparable

Inst. Following

1 benchmarks

Benchmark	DeepSeek V4 Flash (High)	Laguna S 2.1	Result
AA-IFBenchSource	73.5%	—	Not comparable

Frequently Asked Questions (3)

Which is better, DeepSeek V4 Flash (High) or Laguna S 2.1?

DeepSeek V4 Flash (High) and Laguna S 2.1 are tied on the BenchAlign overall score, so the right pick depends on which category matters most for your use case.

Which is better for coding, DeepSeek V4 Flash (High) or Laguna S 2.1?

DeepSeek V4 Flash (High) has the edge for coding in this comparison, averaging 68.5 versus 59.4. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.

Which is better for agentic tasks, DeepSeek V4 Flash (High) or Laguna S 2.1?

Laguna S 2.1 has the edge for agentic tasks in this comparison, averaging 70.2 versus 55.3. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.

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Last updated: July 21, 2026

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