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GPT-4.5 vs GPT-5 nano
Comprehensive side-by-side LLM comparison
GPT-5 nano leads with 1.7% higher average benchmark score. GPT-5 nano offers 395.9K more tokens in context window than GPT-4.5. GPT-5 nano is $224.55 cheaper per million tokens. Both models have their strengths depending on your specific coding needs.
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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 Nano was developed as the most compact variant in the GPT-5 family, designed for deployment in resource-constrained environments and edge computing scenarios. Built to bring next-generation AI capabilities to devices and applications where latency and efficiency are paramount, it distills GPT-5 innovations into a minimal footprint.
5 months newer
GPT-4.5
OpenAI
2025-02-27
GPT-5 nano
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 nano
Input:$0.05
Output:$0.40($224.55 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 nano
Average Score:71.2%(+1.7%)
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Knowledge Cutoff
Training data recency comparison
GPT-5 nano
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 nano
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GPT-4.5
Avg Score:69.5%
Providers:1
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GPT-5 nano
Avg Score:71.2%(+1.7%)
Providers:2