DeepSeek V3.2 vs GPT-5.1
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
GPT-5.1 by OpenAI wins on 14 of 16 benchmarks against DeepSeek V3.2 by DeepSeek, which leads on 2. 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, GPT-5.1 scores 1464 on Chatbot Arena ELO compared to DeepSeek V3.2's 1370, while GPT-5.1 scores 86.0% on MMLU-Pro compared to DeepSeek V3.2's 82.0%.
Coding: In coding, GPT-5.1 scores 93.0% on HumanEval+ compared to DeepSeek V3.2's 87.0%, while GPT-5.1 scores 76.3% on SWE-bench Verified compared to DeepSeek V3.2's 73.0%, while GPT-5.1 scores 82.0% on LiveCodeBench compared to DeepSeek V3.2's 55.0%, while GPT-5.1 scores 49.4 on AA Coding Index compared to DeepSeek V3.2's 44.2.
Math: In math, GPT-5.1 scores 95.0% on MATH compared to DeepSeek V3.2's 85.0%, while GPT-5.1 scores 98.5% on GSM8K compared to DeepSeek V3.2's 94.0%.
Reasoning: In reasoning, GPT-5.1 scores 88.1% on GPQA Diamond compared to DeepSeek V3.2's 60.0%, while GPT-5.1 scores 50.0% on ARC-AGI compared to DeepSeek V3.2's 42.0%.
Context: In context, GPT-5.1 scores 400K on Context Length compared to DeepSeek V3.2's 164K.
Pricing Comparison
DeepSeek V3.2 costs $0.27/1M input tokens and $0.40/1M output tokens, while GPT-5.1 costs $1.3/1M input and $10.0/1M output. DeepSeek V3.2 is the more affordable option for API usage.
Speed Comparison
DeepSeek V3.2 generates output at 70 tok/s compared to GPT-5.1's 95 tok/s, and the time to first token is 400 ms for DeepSeek V3.2 versus 350 ms for GPT-5.1. GPT-5.1 delivers faster throughput.
Verdict
For developers prioritizing affordability, DeepSeek V3.2 has the edge. For those who value coding and general intelligence and math and speed, GPT-5.1 is the stronger choice.
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DeepSeek V3.2 vs GPT-5.1 — FAQ
Which is better, DeepSeek V3.2 or GPT-5.1?
GPT-5.1 wins on more benchmarks overall (14 vs 2). However, the best choice depends on your specific needs — each model excels in different areas.
How does DeepSeek V3.2 compare to GPT-5.1 for coding?
GPT-5.1 is better for coding, scoring 76.3% on SWE-bench Verified compared to 73.0%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is DeepSeek V3.2 cheaper than GPT-5.1?
Yes, DeepSeek V3.2 is cheaper. DeepSeek V3.2 costs $0.27/1M input and $0.40/1M output tokens. GPT-5.1 costs $1.3/1M input and $10.0/1M output tokens.
Which is faster, DeepSeek V3.2 or GPT-5.1?
GPT-5.1 is faster, generating output at 95 tok/s compared to 70 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the DeepSeek V3.2 vs GPT-5.1 comparison cover?
This comparison covers 16 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.