o3 vs Qwen 3.5 397B
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
o3 by OpenAI wins on 8 of 15 benchmarks against Qwen 3.5 397B by Qwen, which leads on 7. 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%.
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.
View Individual Model Pages
o3 vs Qwen 3.5 397B — FAQ
Which is better, o3 or Qwen 3.5 397B?
o3 wins on more benchmarks overall (8 vs 7). However, the best choice depends on your specific needs — each model excels in different areas.
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 15 benchmarks including Chatbot Arena ELO, MMLU-Pro, HumanEval+, MATH, GPQA Diamond, SWE-bench Verified, Output Speed, LiveCodeBench, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.