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Model comparison

DeepSeek V4 Flash (Max) vs Laguna S 2.1

Data verified

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

N/A
No comparison
Laguna S 2.1
Poolside
N/A
1 category wins1 category wins

Evidence parity. DeepSeek V4 Flash (Max) and Laguna S 2.1 share 4 comparable benchmark results. 2 of 8 categories are comparable. 41 results are unique to DeepSeek V4 Flash (Max); 2 to Laguna S 2.1.

Updated July 21, 2026
Shared results
4
DeepSeek V4 Flash (Max) only
41
Laguna S 2.1 only
2
Comparable categories
2 / 8

Treat this as a split decision. DeepSeek V4 Flash (Max) 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 (Max) 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 (Max) 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 (Max) and Laguna S 2.1
CategoryDeepSeek V4 Flash (Max)ΔLaguna S 2.1
CodingDeepSeek V4 Flash (Max)68.8Margin← 9.4Laguna S 2.159.4
AgenticDeepSeek V4 Flash (Max)63.8Margin→ 6.4Laguna S 2.170.2
KnowledgeDeepSeek V4 Flash (Max)55.3MarginNo overlapLaguna S 2.1Not measured
MathDeepSeek V4 Flash (Max)94.8MarginNo overlapLaguna S 2.1Not measured

Decisive benchmark drivers

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

More
A · DeepSeek V4 Flash (Max)B · Laguna S 2.1

  1. Terminal-Bench 2.0

    Agentic
    Source ↗
    A 56.9%B 70.2%
    Winner: Laguna S 2.1Δ 13.3
    Terminal-Bench 2.0: DeepSeek V4 Flash (Max) scored 56.9%; Laguna S 2.1 scored 70.2%. Laguna S 2.1 wins this benchmark.

  2. SWE-bench Pro

    Coding
    Source ↗
    A 52.6%B 59.4%
    Winner: Laguna S 2.1Δ 6.8
    SWE-bench Pro: DeepSeek V4 Flash (Max) scored 52.6%; 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.

MetricDeepSeek V4 Flash (Max)Laguna S 2.1Comparison
Input / output priceUSD per 1M tokensDeepSeek V4 Flash (Max)$0.14 input / $0.28 outputLaguna S 2.1$0.1 input / $0.2 outputLaguna S 2.1 has the lower combined listed price.
Generation speedtokens per secondDeepSeek V4 Flash (Max)Not availableLaguna S 2.1Not availableA complete speed comparison is not available.
First-answer latencyseconds to first tokenDeepSeek V4 Flash (Max)Not availableLaguna S 2.1Not availableA complete latency comparison is not available.
Context windowmaximum listed tokensDeepSeek V4 Flash (Max)1MLaguna S 2.11MListed context windows are equal.

Benchmark Deep Dive

AgenticLaguna S 2.1 wins
BenchmarkDeepSeek V4 Flash (Max)Laguna S 2.1Result
Terminal-Bench 2.0Source 56.9%70.2%Laguna S 2.1 leads
BrowseCompSource 73.2%—Not comparable
HLE w/ toolsSource 45.1%—Not comparable
MCP AtlasSource 69%—Not comparable
GDPval-AASource 1189—Not comparable
ToolathlonSource 47.8%—Not comparable
AA Agentic IndexSource 31.1%—Not comparable
τ²-bench resultsSource 95%—Not comparable
GDPval-AASource 34.4%—Not comparable
AA BriefcaseSource 831—Not comparable
AA EnterpriseOps-GymSource 39.6%—Not comparable
AA Harvey LABSource 81.3%—Not comparable
AA ITBenchSource 31.5%—Not comparable
AA Tau3 BankingSource 22.9%—Not comparable
terminalBenchHardSource 35.6%—Not comparable
Toolathlon-VerifiedSource —49.7%Not comparable
CodingDeepSeek V4 Flash (Max) wins
BenchmarkDeepSeek V4 Flash (Max)Laguna S 2.1Result
CodeforcesSource 3052.0—Not comparable
SWE-bench VerifiedSource 79%—Not comparable
SWE-bench ProSource 52.6%59.4%Laguna S 2.1 leads
SWE MultilingualSource 73.3%78.5%Laguna S 2.1 leads
Terminal-Bench 2.0Source 56.9%70.2%Laguna S 2.1 leads
AA Coding IndexSource 56.2%—Not comparable
AA-SciCodeSource 44.9%—Not comparable
deepSweSource —40.4%Not comparable
Reasoning
BenchmarkDeepSeek V4 Flash (Max)Laguna S 2.1Result
MRCR 1MSource 78.7%—Not comparable
CorpusQA 1MSource 60.5%—Not comparable
AA-LCRSource 63.0%—Not comparable
CritPtSource 7.1%—Not comparable
Knowledge
BenchmarkDeepSeek V4 Flash (Max)Laguna S 2.1Result
MMLU-ProSource 86.2%—Not comparable
SimpleQASource 34.1%—Not comparable
Chinese-SimpleQASource 78.9%—Not comparable
GPQASource 88.1%—Not comparable
GPQA-DSource 88.1%—Not comparable
HLESource 34.8%—Not comparable
Artificial Analysis Intelligence IndexSource 40.3%—Not comparable
AA-GPQA DiamondSource 89.4%—Not comparable
AA-HLESource 32.1%—Not comparable
AA-Omniscience IndexSource -22.9%—Not comparable
AA-Omniscience AccuracySource 37.2%—Not comparable
AA-Omniscience Hallucination RateSource 95.8%—Not comparable
AA Openness IndexSource 50.0%—Not comparable
Math
BenchmarkDeepSeek V4 Flash (Max)Laguna S 2.1Result
HMMT Feb 2026Source 94.8%—Not comparable
IMOAnswerBenchSource 88.4%—Not comparable
ApexSource 33.0%—Not comparable
Apex ShortlistSource 85.7%—Not comparable
Multimodal
BenchmarkDeepSeek V4 Flash (Max)Laguna S 2.1Result
Design Arena WebsiteSource 1238—Not comparable
Inst. Following
BenchmarkDeepSeek V4 Flash (Max)Laguna S 2.1Result
AA-IFBenchSource 79.2%—Not comparable
Frequently Asked Questions (3)

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

DeepSeek V4 Flash (Max) 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 (Max) or Laguna S 2.1?

DeepSeek V4 Flash (Max) has the edge for coding in this comparison, averaging 68.8 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 (Max) or Laguna S 2.1?

Laguna S 2.1 has the edge for agentic tasks in this comparison, averaging 70.2 versus 63.8. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.

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