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Model comparison

Claude Opus 4.8 vs Qwen3.5 397B (Reasoning)

Data verified

Head-to-head evidence from 15 shared benchmark results across 5 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.

78.34/100
Margin
18.8pts
← winning
59.5/100
0 category wins0 category wins

Public leaderboard positions: Claude Opus 4.8 #5 (Supported); Qwen3.5 397B (Reasoning) #56 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. Claude Opus 4.8 and Qwen3.5 397B (Reasoning) share 15 comparable benchmark results. 0 of 8 categories are comparable. 38 results are unique to Claude Opus 4.8; 2 to Qwen3.5 397B (Reasoning).

Updated July 23, 2026
Shared results
15
Claude Opus 4.8 only
38
Qwen3.5 397B (Reasoning) only
2
Comparable categories
0 / 8

Benchmark data for Claude Opus 4.8 and Qwen3.5 397B (Reasoning) is coming soon on BenchLM.

Confidence note. This is a partial-evidence comparison with 15 shared benchmark results across 5 evidence categories; 0 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.

Why this result

BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.

Claude Opus 4.8 is priced at $5.00 input / $25.00 output per 1M tokens, versus $0.60 input / $3.60 output per 1M tokens for Qwen3.5 397B (Reasoning). Claude Opus 4.8 has the larger context window at 1M, compared with 128K for Qwen3.5 397B (Reasoning).

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 Qwen3.5 397B (Reasoning)
CategoryClaude Opus 4.8ΔQwen3.5 397B (Reasoning)
AgenticClaude Opus 4.880.3MarginNo overlapQwen3.5 397B (Reasoning)Not measured
CodingClaude Opus 4.881.1MarginNo overlapQwen3.5 397B (Reasoning)Not measured
KnowledgeClaude Opus 4.862.7MarginNo overlapQwen3.5 397B (Reasoning)Not measured
MathClaude Opus 4.853.9MarginNo overlapQwen3.5 397B (Reasoning)Not measured
MultimodalClaude Opus 4.877.0MarginNo overlapQwen3.5 397B (Reasoning)Not measured

Operational comparison

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

MetricClaude Opus 4.8Qwen3.5 397B (Reasoning)Comparison
Input / output priceUSD per 1M tokensClaude Opus 4.8$5 input / $25 outputQwen3.5 397B (Reasoning)$0.6 input / $3.6 outputQwen3.5 397B (Reasoning) has the lower combined listed price.
Generation speedtokens per secondClaude Opus 4.8Not availableQwen3.5 397B (Reasoning)Not availableA complete speed comparison is not available.
First-answer latencyseconds to first tokenClaude Opus 4.8Not availableQwen3.5 397B (Reasoning)Not availableA complete latency comparison is not available.
Context windowmaximum listed tokensClaude Opus 4.81MQwen3.5 397B (Reasoning)128KClaude Opus 4.8 lists the larger context window.

Benchmark Deep Dive

Agentic
BenchmarkClaude Opus 4.8Qwen3.5 397B (Reasoning)Result
Terminal-Bench 2.0Source 74.6%—Not comparable
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 1594962Claude Opus 4.8 leads
MCP AtlasSource 82.2%—Not comparable
ToolathlonSource 59.9%—Not comparable
Gert LabsSource 72.97%—Not comparable
AA Agentic IndexSource 47.2%19.9%Claude Opus 4.8 leads
τ²-bench resultsSource 94.4%95.6%Qwen3.5 397B (Reasoning) leads
GDPval-AASource 54.7%23.1%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
APEX-Agents-AASource —15.3%Not comparable
Coding
BenchmarkClaude Opus 4.8Qwen3.5 397B (Reasoning)Result
SWE-bench VerifiedSource 88.6%—Not comparable
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%—Not comparable
cursorBench31Source 58.4%—Not comparable
cursorBench32Source 62.3%—Not comparable
AA Coding IndexSource 74.3%48.2%Claude Opus 4.8 leads
AA-SciCodeSource 53.5%42.0%Claude Opus 4.8 leads
FrontierCode 1.1 MainSource 46.5%—Not comparable
Reasoning
BenchmarkClaude Opus 4.8Qwen3.5 397B (Reasoning)Result
AA-LCRSource 67.7%65.7%Claude Opus 4.8 leads
CritPtSource 20.9%1.7%Claude Opus 4.8 leads
Knowledge
BenchmarkClaude Opus 4.8Qwen3.5 397B (Reasoning)Result
GPQASource 93.6%—Not comparable
GPQA-DSource 93.6%—Not comparable
HLESource 57.9%—Not comparable
HLE w/o toolsSource 49.8%—Not comparable
Artificial Analysis Intelligence IndexSource 55.7%33.7%Claude Opus 4.8 leads
AA-GPQA DiamondSource 92.0%89.3%Claude Opus 4.8 leads
AA-HLESource 45.7%27.3%Claude Opus 4.8 leads
AA-Omniscience IndexSource 27.4%-29.8%Claude Opus 4.8 leads
AA-Omniscience AccuracySource 46.6%31.4%Claude Opus 4.8 leads
AA-Omniscience Hallucination RateSource 35.9%89.1%Claude Opus 4.8 leads
Math
BenchmarkClaude Opus 4.8Qwen3.5 397B (Reasoning)Result
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 4.8Qwen3.5 397B (Reasoning)Result
INCLUDESource 87.6%—Not comparable
Multimodal
BenchmarkClaude Opus 4.8Qwen3.5 397B (Reasoning)Result
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
AA-MMMU-ProSource —77.3%Not comparable
Inst. Following
BenchmarkClaude Opus 4.8Qwen3.5 397B (Reasoning)Result
AA-IFBenchSource 62.2%78.8%Qwen3.5 397B (Reasoning) leads
Frequently Asked Questions (3)

Can I compare Claude Opus 4.8 and Qwen3.5 397B (Reasoning) on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.

Why does this comparison show “coming soon”?

BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.

What data is available for Claude Opus 4.8 and Qwen3.5 397B (Reasoning) today?

Claude Opus 4.8: $5.00 input / $25.00 output per 1M tokens Qwen3.5 397B (Reasoning): $0.60 input / $3.60 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.

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