Claude Opus 4 vs Qwen 3.5 397B
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Claude Opus 4 by Anthropic and Qwen 3.5 397B by Qwen are evenly matched across 16 benchmarks. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from our benchmark data.
Category-by-Category Breakdown
General Intelligence: In general intelligence, Claude Opus 4 scores 1375 on Chatbot Arena ELO compared to Qwen 3.5 397B's 1350, while Claude Opus 4 scores 83.0% on MMLU-Pro compared to Qwen 3.5 397B's 81.0%.
Coding: In coding, Claude Opus 4 scores 90.0% on HumanEval+ compared to Qwen 3.5 397B's 88.0%, while Qwen 3.5 397B scores 76.4% on SWE-bench Verified compared to Claude Opus 4's 72.5%, while Claude Opus 4 scores 60.0% on LiveCodeBench compared to Qwen 3.5 397B's 54.0%, while Qwen 3.5 397B scores 1183 on Design Arena ELO compared to Claude Opus 4's 1171.
Math: In math, Qwen 3.5 397B scores 87.0% on MATH compared to Claude Opus 4's 86.0%, while both score 95.0% on GSM8K.
Reasoning: In reasoning, Claude Opus 4 scores 79.6% on GPQA Diamond compared to Qwen 3.5 397B's 62.0%, while both score 45.0% on ARC-AGI.
Context: In context, Qwen 3.5 397B scores 262K on Context Length compared to Claude Opus 4's 200K.
Pricing Comparison
Claude Opus 4 costs $15.0/1M input tokens and $75.0/1M output tokens, while Qwen 3.5 397B costs $0.55/1M input and $3.5/1M output. Qwen 3.5 397B is the more affordable option for API usage.
Speed Comparison
Claude Opus 4 generates output at 50 tok/s compared to Qwen 3.5 397B's 45 tok/s, and the time to first token is 550 ms for Claude Opus 4 versus 600 ms for Qwen 3.5 397B. Claude Opus 4 delivers faster throughput.
Verdict
For developers prioritizing general intelligence and speed, Claude Opus 4 has the edge. For those who value coding and math and affordability, Qwen 3.5 397B is the stronger choice.
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Claude Opus 4 vs Qwen 3.5 397B — FAQ
Which is better, Claude Opus 4 or Qwen 3.5 397B?
Claude Opus 4 and Qwen 3.5 397B are evenly matched across benchmarks. The best choice depends on your specific priorities such as coding ability, speed, or pricing.
How does Claude Opus 4 compare to Qwen 3.5 397B for coding?
Qwen 3.5 397B is better for coding, scoring 76.4% on SWE-bench Verified compared to 72.5%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is Claude Opus 4 cheaper than Qwen 3.5 397B?
Yes, Qwen 3.5 397B is cheaper. Claude Opus 4 costs $15.0/1M input and $75.0/1M output tokens. Qwen 3.5 397B costs $0.55/1M input and $3.5/1M output tokens.
Which is faster, Claude Opus 4 or Qwen 3.5 397B?
Claude Opus 4 is faster, generating output at 50 tok/s compared to 45 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the Claude Opus 4 vs Qwen 3.5 397B comparison cover?
This comparison covers 16 benchmarks including Chatbot Arena ELO, MMLU-Pro, HumanEval+, MATH, SWE-bench Verified, GPQA Diamond, Output Speed, Time to First Token, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.