o3 vs Qwen 3.5 397B
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
o3 by OpenAI 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, o3 scores 1380 on Chatbot Arena ELO compared to Qwen 3.5 397B's 1350, while o3 scores 84.0% on MMLU-Pro compared to Qwen 3.5 397B's 81.0%.
Coding: In coding, o3 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 o3's 69.1%, while o3 scores 70.0% on LiveCodeBench compared to Qwen 3.5 397B's 54.0%, while Qwen 3.5 397B scores 1183 on Design Arena ELO compared to o3's 1074.
Math: In math, o3 scores 96.0% on MATH compared to Qwen 3.5 397B's 87.0%, while o3 scores 98.5% on GSM8K compared to Qwen 3.5 397B's 95.0%.
Reasoning: In reasoning, o3 scores 83.3% on GPQA Diamond compared to Qwen 3.5 397B's 62.0%, while o3 scores 75.7% on ARC-AGI compared to Qwen 3.5 397B's 45.0%.
Context: In context, Qwen 3.5 397B scores 262K on Context Length compared to o3's 200K.
Pricing Comparison
o3 costs $2.0/1M input tokens and $8.0/1M 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
o3 generates output at 40 tok/s compared to Qwen 3.5 397B's 45 tok/s, and the time to first token is 800 ms for o3 versus 600 ms for Qwen 3.5 397B. Qwen 3.5 397B delivers faster throughput.
Verdict
For developers prioritizing general intelligence and math, o3 has the edge. For those who value coding and affordability and speed, Qwen 3.5 397B is the stronger choice.
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o3 vs Qwen 3.5 397B — FAQ
Which is better, o3 or Qwen 3.5 397B?
o3 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 o3 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 69.1%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is o3 cheaper than Qwen 3.5 397B?
Yes, Qwen 3.5 397B is cheaper. o3 costs $2.0/1M input and $8.0/1M output tokens. Qwen 3.5 397B costs $0.55/1M input and $3.5/1M output tokens.
Which is faster, o3 or Qwen 3.5 397B?
Qwen 3.5 397B is faster, generating output at 45 tok/s compared to 40 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the o3 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.