GPT-5.1 vs o4 Mini
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
GPT-5.1 by OpenAI wins on 10 of 15 benchmarks against o4 Mini by OpenAI, which leads on 5. 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 o4 Mini's 1350, while GPT-5.1 scores 86.0% on MMLU-Pro compared to o4 Mini's 80.0%.
Coding: In coding, GPT-5.1 scores 93.0% on HumanEval+ compared to o4 Mini's 88.0%, while GPT-5.1 scores 76.3% on SWE-bench Verified compared to o4 Mini's 68.1%, while GPT-5.1 scores 82.0% on LiveCodeBench compared to o4 Mini's 58.0%.
Math: In math, GPT-5.1 scores 95.0% on MATH compared to o4 Mini's 93.0%, while GPT-5.1 scores 98.5% on GSM8K compared to o4 Mini's 97.5%.
Reasoning: In reasoning, GPT-5.1 scores 88.1% on GPQA Diamond compared to o4 Mini's 81.4%, while o4 Mini scores 55.0% on ARC-AGI compared to GPT-5.1's 50.0%.
Context: In context, GPT-5.1 scores 400K on Context Length compared to o4 Mini's 200K.
Pricing Comparison
GPT-5.1 costs $1.3/1M input tokens and $10.0/1M output tokens, while o4 Mini costs $1.1/1M input and $4.4/1M output. o4 Mini is the more affordable option for API usage.
Speed Comparison
GPT-5.1 generates output at 95 tok/s compared to o4 Mini's 120 tok/s, and the time to first token is 350 ms for GPT-5.1 versus 300 ms for o4 Mini. o4 Mini delivers faster throughput.
Verdict
For developers prioritizing coding and general intelligence and math, GPT-5.1 has the edge. For those who value affordability and speed, o4 Mini is the stronger choice.
View Individual Model Pages
GPT-5.1 vs o4 Mini — FAQ
Which is better, GPT-5.1 or o4 Mini?
GPT-5.1 wins on more benchmarks overall (10 vs 5). However, the best choice depends on your specific needs — each model excels in different areas.
How does GPT-5.1 compare to o4 Mini for coding?
GPT-5.1 is better for coding, scoring 76.3% on SWE-bench Verified compared to 68.1%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is GPT-5.1 cheaper than o4 Mini?
Yes, o4 Mini is cheaper. GPT-5.1 costs $1.3/1M input and $10.0/1M output tokens. o4 Mini costs $1.1/1M input and $4.4/1M output tokens.
Which is faster, GPT-5.1 or o4 Mini?
o4 Mini is faster, generating output at 120 tok/s compared to 95 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the GPT-5.1 vs o4 Mini 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.