GPT-5.2 vs Qwen 3.5 397B
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
GPT-5.2 by OpenAI wins on 12 of 14 benchmarks against Qwen 3.5 397B by Qwen, which leads on 2. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from the AI Value Index.
Category-by-Category Breakdown
General Intelligence: In general intelligence, GPT-5.2 scores 1475 on Chatbot Arena ELO compared to Qwen 3.5 397B's 1350, while GPT-5.2 scores 83.0% on MMLU-Pro compared to Qwen 3.5 397B's 81.0%.
Coding: In coding, GPT-5.2 scores 95.0% on HumanEval+ compared to Qwen 3.5 397B's 88.0%, while GPT-5.2 scores 80.0% on SWE-bench Verified compared to Qwen 3.5 397B's 76.4%, while GPT-5.2 scores 80.0% on LiveCodeBench compared to Qwen 3.5 397B's 54.0%.
Math: In math, GPT-5.2 scores 97.0% on MATH compared to Qwen 3.5 397B's 87.0%, while GPT-5.2 scores 99.0% on GSM8K compared to Qwen 3.5 397B's 95.0%.
Reasoning: In reasoning, GPT-5.2 scores 92.4% on GPQA Diamond compared to Qwen 3.5 397B's 62.0%, while GPT-5.2 scores 54.2% on ARC-AGI compared to Qwen 3.5 397B's 45.0%.
Context: In context, GPT-5.2 scores 400K on Context Length compared to Qwen 3.5 397B's 131K.
Pricing Comparison
GPT-5.2 costs $1.8/1M input tokens and $14.0/1M output tokens, while Qwen 3.5 397B costs $0.60/1M input and $3.6/1M output. Qwen 3.5 397B is the more affordable option for API usage.
Speed Comparison
GPT-5.2 generates output at 90 tok/s compared to Qwen 3.5 397B's 45 tok/s, and the time to first token is 380 ms for GPT-5.2 versus 600 ms for Qwen 3.5 397B. GPT-5.2 delivers faster throughput.
Verdict
For developers prioritizing coding and general intelligence and math and speed, GPT-5.2 has the edge. For those who value affordability, Qwen 3.5 397B is the stronger choice.
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GPT-5.2 vs Qwen 3.5 397B — FAQ
Which is better, GPT-5.2 or Qwen 3.5 397B?
GPT-5.2 wins on more benchmarks overall (12 vs 2). However, the best choice depends on your specific needs — each model excels in different areas.
How does GPT-5.2 compare to Qwen 3.5 397B for coding?
GPT-5.2 is better for coding, scoring 80.0% on SWE-bench Verified compared to 76.4%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is GPT-5.2 cheaper than Qwen 3.5 397B?
Yes, Qwen 3.5 397B is cheaper. GPT-5.2 costs $1.8/1M input and $14.0/1M output tokens. Qwen 3.5 397B costs $0.60/1M input and $3.6/1M output tokens.
Which is faster, GPT-5.2 or Qwen 3.5 397B?
GPT-5.2 is faster, generating output at 90 tok/s compared to 45 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the GPT-5.2 vs Qwen 3.5 397B comparison cover?
This comparison covers 14 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.