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Model comparison

Claude Opus 4.8 vs Hy3 Preview

Data verified

Head-to-head evidence from 20 shared benchmark results across 4 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.

78.34/100
No comparison
N/A
3 category wins0 category wins

Public leaderboard positions: Claude Opus 4.8 #5 (Supported); Hy3 Preview unranked (Not scored). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. Claude Opus 4.8 and Hy3 Preview share 20 comparable benchmark results. 3 of 8 categories are comparable. 33 results are unique to Claude Opus 4.8; 2 to Hy3 Preview.

Updated July 23, 2026
Shared results
20
Claude Opus 4.8 only
33
Hy3 Preview only
2
Comparable categories
3 / 8

Treat this as a split decision. Claude Opus 4.8 makes more sense if knowledge is the priority or you need the larger 1M context window; Hy3 Preview is the better fit if you want the cheaper token bill.

Confidence note. This is a partial-evidence comparison with 20 shared benchmark results across 4 evidence categories; 3 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.

Why this result

Claude Opus 4.8 and Hy3 Preview 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 Opus 4.8 is also the more expensive model on tokens at $5.00 input / $25.00 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Hy3 Preview. That is roughly Infinityx on output cost alone. Claude Opus 4.8 gives you the larger context window at 1M, compared with 256K for Hy3 Preview.

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 Opus 4.8 and Hy3 Preview
CategoryClaude Opus 4.8ΔHy3 Preview
KnowledgeClaude Opus 4.862.7Margin← 28.9Hy3 Preview33.8
AgenticClaude Opus 4.880.3Margin← 25.9Hy3 Preview54.4
CodingClaude Opus 4.881.1Margin← 23.3Hy3 Preview57.8
MathClaude Opus 4.853.9MarginNo overlapHy3 PreviewNot measured
MultimodalClaude Opus 4.877.0MarginNo overlapHy3 PreviewNot measured
Inst. FollowingClaude Opus 4.8Not measuredMarginNo overlapHy3 Preview63.1

Decisive benchmark drivers

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

More
A · Claude Opus 4.8B · Hy3 Preview

  1. HLE

    Knowledge
    Source ↗
    A 57.9%B 25.5%
    Winner: Claude Opus 4.8Δ 32.4
    HLE: Claude Opus 4.8 scored 57.9%; Hy3 Preview scored 25.5%. Claude Opus 4.8 wins this benchmark.

  2. Terminal-Bench 2.0

    Agentic
    Source ↗
    A 74.6%B 54.4%
    Winner: Claude Opus 4.8Δ 20.2
    Terminal-Bench 2.0: Claude Opus 4.8 scored 74.6%; Hy3 Preview scored 54.4%. Claude Opus 4.8 wins this benchmark.

  3. SWE-bench Verified

    Coding
    Source ↗
    A 88.6%B 74.4%
    Winner: Claude Opus 4.8Δ 14.2
    SWE-bench Verified: Claude Opus 4.8 scored 88.6%; Hy3 Preview scored 74.4%. Claude Opus 4.8 wins this benchmark.

  4. GPQA

    Knowledge
    Source ↗
    A 93.6%B 87.2%
    Winner: Claude Opus 4.8Δ 6.4
    GPQA: Claude Opus 4.8 scored 93.6%; Hy3 Preview scored 87.2%. Claude Opus 4.8 wins this benchmark.

Operational comparison

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

MetricClaude Opus 4.8Hy3 PreviewComparison
Input / output priceUSD per 1M tokensClaude Opus 4.8$5 input / $25 outputHy3 Preview$0 input / $0 outputHy3 Preview has the lower combined listed price.
Generation speedtokens per secondClaude Opus 4.8Not availableHy3 PreviewNot availableA complete speed comparison is not available.
First-answer latencyseconds to first tokenClaude Opus 4.8Not availableHy3 PreviewNot availableA complete latency comparison is not available.
Context windowmaximum listed tokensClaude Opus 4.81MHy3 Preview256KClaude Opus 4.8 lists the larger context window.

Benchmark Deep Dive

AgenticClaude Opus 4.8 wins
BenchmarkClaude Opus 4.8Hy3 PreviewResult
Terminal-Bench 2.0Source 74.6%54.4%Claude Opus 4.8 leads
BrowseCompSource 84.3%—Not comparable
DeepSearchQASource 93.1%—Not comparable
OSWorld-VerifiedSource 83.4%—Not comparable
Finance Agent v2Source 53.9%—Not comparable
GDPval-AASource 15941214Claude Opus 4.8 leads
MCP AtlasSource 82.2%—Not comparable
ToolathlonSource 59.9%—Not comparable
Gert LabsSource 72.97%36.91%Claude Opus 4.8 leads
AA Agentic IndexSource 47.2%30.7%Claude Opus 4.8 leads
τ²-bench resultsSource 94.4%—Not comparable
GDPval-AASource 54.7%35.7%Claude Opus 4.8 leads
ResearchClawBenchSource 21.1%—Not comparable
OSWorld 2.0Source 20.6%—Not comparable
AA BriefcaseSource 1347—Not comparable
AA AutomationBenchSource 48.5%—Not comparable
AA EnterpriseOps-GymSource 44.0%—Not comparable
AA Harvey LABSource 91.1%—Not comparable
AA Tau3 BankingSource 27.6%—Not comparable
terminalBenchHardSource 58.3%—Not comparable
aaTerminalBench21Source 84.6%—Not comparable
CodingClaude Opus 4.8 wins
BenchmarkClaude Opus 4.8Hy3 PreviewResult
SWE-bench VerifiedSource 88.6%74.4%Claude Opus 4.8 leads
SWE-bench ProSource 69.2%—Not comparable
SWE MultilingualSource 84.4%—Not comparable
SWE MultimodalSource 38.4%—Not comparable
Terminal-Bench 2.0Source 74.6%54.4%Claude Opus 4.8 leads
cursorBench31Source 58.4%—Not comparable
cursorBench32Source 62.3%—Not comparable
AA Coding IndexSource 74.3%58.8%Claude Opus 4.8 leads
AA-SciCodeSource 53.5%47.6%Claude Opus 4.8 leads
FrontierCode 1.1 MainSource 46.5%—Not comparable
SciCodeSource —41.2%Not comparable
Reasoning
BenchmarkClaude Opus 4.8Hy3 PreviewResult
AA-LCRSource 67.7%66.7%Claude Opus 4.8 leads
CritPtSource 20.9%4.9%Claude Opus 4.8 leads
KnowledgeClaude Opus 4.8 wins
BenchmarkClaude Opus 4.8Hy3 PreviewResult
GPQASource 93.6%87.2%Claude Opus 4.8 leads
GPQA-DSource 93.6%87.2%Claude Opus 4.8 leads
HLESource 57.9%25.5%Claude Opus 4.8 leads
HLE w/o toolsSource 49.8%—Not comparable
Artificial Analysis Intelligence IndexSource 55.7%41.2%Claude Opus 4.8 leads
AA-GPQA DiamondSource 92.0%89.7%Claude Opus 4.8 leads
AA-HLESource 45.7%31.6%Claude Opus 4.8 leads
AA-Omniscience IndexSource 27.4%-18.5%Claude Opus 4.8 leads
AA-Omniscience AccuracySource 46.6%31.5%Claude Opus 4.8 leads
AA-Omniscience Hallucination RateSource 35.9%73.0%Claude Opus 4.8 leads
Math
BenchmarkClaude Opus 4.8Hy3 PreviewResult
USAMO 2026Source 96.7%—Not comparable
FrontierMath v2 (Tiers 1-3)Source 47.241%—Not comparable
FrontierMath v2 (Tier 4)Source 31.250%—Not comparable
Multilingual
BenchmarkClaude Opus 4.8Hy3 PreviewResult
INCLUDESource 87.6%—Not comparable
Multimodal
BenchmarkClaude Opus 4.8Hy3 PreviewResult
OfficeQA ProSource 66.2%—Not comparable
ScreenSpot ProSource 87.9%—Not comparable
CharXivSource 89.9%—Not comparable
CharXiv w/o toolsSource 80.5%—Not comparable
Design Arena WebsiteSource 1270—Not comparable
Inst. Following
BenchmarkClaude Opus 4.8Hy3 PreviewResult
AA-IFBenchSource 62.2%—Not comparable
IFBenchSource —63.1%Not comparable
Frequently Asked Questions (4)

Which is better, Claude Opus 4.8 or Hy3 Preview?

Claude Opus 4.8 and Hy3 Preview 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 knowledge tasks, Claude Opus 4.8 or Hy3 Preview?

Claude Opus 4.8 has the edge for knowledge tasks in this comparison, averaging 62.7 versus 33.8. Inside this category, AA-Omniscience Index is the benchmark that creates the most daylight between them.

Which is better for coding, Claude Opus 4.8 or Hy3 Preview?

Claude Opus 4.8 has the edge for coding in this comparison, averaging 81.1 versus 57.8. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.

Which is better for agentic tasks, Claude Opus 4.8 or Hy3 Preview?

Claude Opus 4.8 has the edge for agentic tasks in this comparison, averaging 80.3 versus 54.4. Inside this category, GDPval-AA is the benchmark that creates the most daylight between them.

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