GPT-5.1 vs GPT-5.4 mini
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
GPT-5.4 mini by OpenAI wins on 4 of 7 benchmarks against GPT-5.1 by OpenAI, 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
Coding: In coding, GPT-5.4 mini scores 56.1 on AA Coding Index compared to GPT-5.1's 49.4.
Reasoning: In reasoning, GPT-5.1 scores 86.2% on GPQA Diamond compared to GPT-5.4 mini's 83.7%, while GPT-5.1 scores 75.7% on τ²-Bench Airline compared to GPT-5.4 mini's 63.0%.
Context: In context, both score 400K on Context Length.
Pricing Comparison
GPT-5.1 costs $1.3/1M input tokens and $10.0/1M output tokens, while GPT-5.4 mini costs $0.75/1M input and $4.5/1M output. GPT-5.4 mini is the more affordable option for API usage.
Verdict
GPT-5.4 mini leads across the board in affordability, making it the stronger overall choice in this comparison.
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GPT-5.1 vs GPT-5.4 mini — FAQ
Which is better, GPT-5.1 or GPT-5.4 mini?
GPT-5.4 mini wins on more benchmarks overall (4 vs 2). However, the best choice depends on your specific needs — each model excels in different areas.
How does GPT-5.1 compare to GPT-5.4 mini for coding?
SWE-bench Verified data is not available for both models. Check the detailed comparison charts above for other coding-related metrics.
Is GPT-5.1 cheaper than GPT-5.4 mini?
Yes, GPT-5.4 mini is cheaper. GPT-5.1 costs $1.3/1M input and $10.0/1M output tokens. GPT-5.4 mini costs $0.75/1M input and $4.5/1M output tokens.
Which is faster, GPT-5.1 or GPT-5.4 mini?
Output speed data is not available for both models. Check the speed section of the comparison above for available performance data.
What benchmarks does the GPT-5.1 vs GPT-5.4 mini comparison cover?
This comparison covers 7 benchmarks including GPQA Diamond, Input Cost, Output Cost, Context Length, AA Coding Index, Cached Input Cost, τ²-Bench Airline. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.