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Model comparison

Claude Mythos 5 vs Laguna XS.2

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.

83.93/100
No comparison
Laguna XS.2
Poolside
N/A
2 category wins0 category wins

Public leaderboard positions: Claude Mythos 5 #1 (Supported); Laguna XS.2 unranked (Not scored). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. Claude Mythos 5 and Laguna XS.2 share 4 comparable benchmark results. 2 of 8 categories are comparable. 11 results are unique to Claude Mythos 5; 1 to Laguna XS.2.

Updated July 23, 2026
Shared results
4
Claude Mythos 5 only
11
Laguna XS.2 only
1
Comparable categories
2 / 8

Treat this as a split decision. Claude Mythos 5 makes more sense if agentic is the priority or you need the larger 1M+ context window; Laguna XS.2 is the better fit if 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

Claude Mythos 5 and Laguna XS.2 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.

Claude Mythos 5 is also the more expensive model on tokens at $10.00 input / $50.00 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Laguna XS.2. That is roughly Infinityx on output cost alone. Claude Mythos 5 gives you the larger context window at 1M+, compared with 256K for Laguna XS.2.

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 Claude Mythos 5 and Laguna XS.2
CategoryClaude Mythos 5ΔLaguna XS.2
AgenticClaude Mythos 587.0Margin← 51.3Laguna XS.235.7
CodingClaude Mythos 589.7Margin← 28.9Laguna XS.260.8
KnowledgeClaude Mythos 568.5MarginNo overlapLaguna XS.2Not measured
MathClaude Mythos 597.6MarginNo overlapLaguna XS.2Not measured
MultimodalClaude Mythos 593.5MarginNo overlapLaguna XS.2Not measured

Decisive benchmark drivers

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

More
A · Claude Mythos 5B · Laguna XS.2

  1. Terminal-Bench 2.0

    Agentic
    Source ↗
    A 88%B 35.7%
    Winner: Claude Mythos 5Δ 52.3
    Terminal-Bench 2.0: Claude Mythos 5 scored 88%; Laguna XS.2 scored 35.7%. Claude Mythos 5 wins this benchmark.

  2. SWE-bench Pro

    Coding
    Source ↗
    A 80.3%B 46.3%
    Winner: Claude Mythos 5Δ 34
    SWE-bench Pro: Claude Mythos 5 scored 80.3%; Laguna XS.2 scored 46.3%. Claude Mythos 5 wins this benchmark.

  3. SWE-bench Verified

    Coding
    Source ↗
    A 95.5%B 69.9%
    Winner: Claude Mythos 5Δ 25.6
    SWE-bench Verified: Claude Mythos 5 scored 95.5%; Laguna XS.2 scored 69.9%. Claude Mythos 5 wins this benchmark.

Operational comparison

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

MetricClaude Mythos 5Laguna XS.2Comparison
Input / output priceUSD per 1M tokensClaude Mythos 5$10 input / $50 outputLaguna XS.2$0 input / $0 outputLaguna XS.2 has the lower combined listed price.
Generation speedtokens per secondClaude Mythos 5Not availableLaguna XS.2Not availableA complete speed comparison is not available.
First-answer latencyseconds to first tokenClaude Mythos 5Not availableLaguna XS.2Not availableA complete latency comparison is not available.
Context windowmaximum listed tokensClaude Mythos 51M+Laguna XS.2256KClaude Mythos 5 lists the larger context window.

Benchmark Deep Dive

AgenticClaude Mythos 5 wins
BenchmarkClaude Mythos 5Laguna XS.2Result
Terminal-Bench 2.0Source 88%35.7%Claude Mythos 5 leads
OSWorld-VerifiedSource 85%—Not comparable
BrowseCompSource 88%—Not comparable
ExploitGymSource 17.5%—Not comparable
CodingClaude Mythos 5 wins
BenchmarkClaude Mythos 5Laguna XS.2Result
SWE-bench VerifiedSource 95.5%69.9%Claude Mythos 5 leads
SWE-bench ProSource 80.3%46.3%Claude Mythos 5 leads
Terminal-Bench 2.0Source 88.0%35.7%Claude Mythos 5 leads
SWE MultilingualSource —57.7%Not comparable
Knowledge
BenchmarkClaude Mythos 5Laguna XS.2Result
GPQASource 94.1%—Not comparable
HLESource 64.5%—Not comparable
HLE w/o toolsSource 59%—Not comparable
Math
BenchmarkClaude Mythos 5Laguna XS.2Result
USAMO 2026Source 97.6%—Not comparable
Multilingual
BenchmarkClaude Mythos 5Laguna XS.2Result
SWE MultilingualSource 92.2%—Not comparable
Multimodal
BenchmarkClaude Mythos 5Laguna XS.2Result
SWE-bench MultimodalSource 54.9%—Not comparable
CharXivSource 93.5%—Not comparable
CharXiv w/o toolsSource 88.9%—Not comparable
Frequently Asked Questions (3)

Which is better, Claude Mythos 5 or Laguna XS.2?

Claude Mythos 5 and Laguna XS.2 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, Claude Mythos 5 or Laguna XS.2?

Claude Mythos 5 has the edge for coding in this comparison, averaging 89.7 versus 60.8. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.

Which is better for agentic tasks, Claude Mythos 5 or Laguna XS.2?

Claude Mythos 5 has the edge for agentic tasks in this comparison, averaging 87 versus 35.7. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.

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