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GPT-5 mini vs o3
Comprehensive side-by-side LLM comparison
GPT-5 mini leads with 1.6% higher average benchmark score. GPT-5 mini offers 228.0K more tokens in context window than o3. GPT-5 mini is $7.75 cheaper per million tokens. Both models have their strengths depending on your specific coding needs.
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OpenAI
GPT-5 Mini was created as a more accessible version of GPT-5, designed to provide strong capabilities with improved efficiency and lower operational costs. Built to extend GPT-5's advancements to a broader range of applications, it balances advanced performance with practical deployment considerations.
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OpenAI
o3 represents the next generation in OpenAI's reasoning model series, developed to advance the capabilities of deliberate, step-by-step problem solving. Built to handle increasingly complex challenges across mathematics, science, and coding, it continues the evolution of reasoning-focused AI with improved analytical depth and accuracy.
3 months newer
o3
OpenAI
2025-04-16
GPT-5 mini
OpenAI
2025-08-07
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Pricing Comparison
Cost per million tokens (USD)
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GPT-5 mini
Input:$0.25
Output:$2.00($7.75 cheaper)
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o3
Input:$2.00
Output:$8.00
Performance Metrics
Context window and performance specifications
Average performance across 4 common benchmarks
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GPT-5 mini
Average Score:53.0%(+1.6%)
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o3
Average Score:51.4%
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Knowledge Cutoff
Training data recency comparison
GPT-5 mini
2024-05-30
o3
2024-05-31
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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GPT-5 mini
2 providers
OpenAI
Throughput: 200 tok/s
Latency: 1ms
ZeroEval
Throughput: 200 tok/s
Latency: 1ms
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GPT-5 mini
Avg Score:53.0%(+1.6%)
Providers:2
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o3
Avg Score:51.4%
Providers:1