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GPT-4.5 vs GPT-5 mini
Comprehensive side-by-side LLM comparison
GPT-5 mini leads with 12.8% higher average benchmark score. GPT-5 mini offers 395.9K more tokens in context window than GPT-4.5. GPT-5 mini is $222.75 cheaper per million tokens. Overall, GPT-5 mini is the stronger choice for coding tasks.
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OpenAI
GPT-4.5 was developed as an intermediate advancement between GPT-4 and GPT-5, designed to incorporate incremental improvements in reasoning, factuality, and instruction-following. Built to bridge generational capabilities while maintaining compatibility with existing applications, it represents a refinement of the GPT-4 architecture with enhanced performance characteristics.
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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.
5 months newer
GPT-4.5
OpenAI
2025-02-27
GPT-5 mini
OpenAI
2025-08-07
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Pricing Comparison
Cost per million tokens (USD)
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GPT-4.5
Input:$75.00
Output:$150.00
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GPT-5 mini
Input:$0.25
Output:$2.00($222.75 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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GPT-4.5
Average Score:69.5%
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GPT-5 mini
Average Score:82.3%(+12.8%)
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Knowledge Cutoff
Training data recency comparison
GPT-5 mini
2024-05-30
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-4.5
1 providers
OpenAI
Throughput: 50 tok/s
Latency: 20ms
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GPT-5 mini
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GPT-4.5
Avg Score:69.5%
Providers:1
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GPT-5 mini
Avg Score:82.3%(+12.8%)
Providers:2