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GPT-4.5 vs GPT-5 nano
Comprehensive side-by-side LLM comparison
GPT-4.5 leads with 46.9% 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. Overall, GPT-4.5 is the stronger choice for coding tasks.
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OpenAI
GPT-4.5 is a multimodal language model developed by OpenAI. It achieves strong performance with an average score of 63.1% across 27 benchmarks. It excels particularly in GSM8k (97.0%), MMLU (90.8%), CharXiv-D (90.0%). It supports a 132K token context window for handling large documents. The model is available through 1 API provider. As a multimodal model, it can process and understand text, images, and other input formats seamlessly. Released in 2025, it represents OpenAI's latest advancement in AI technology.
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OpenAI
GPT-5 nano is a multimodal language model developed by OpenAI. The model shows competitive results across 5 benchmarks. It excels particularly in AIME 2025 (85.2%), HMMT 2025 (75.6%), GPQA (71.2%). It supports a 528K token context window for handling large documents. The model is available through 2 API providers. As a multimodal model, it can process and understand text, images, and other input formats seamlessly. Released in 2025, it represents OpenAI's latest advancement in AI technology.
5 months newer
GPT-4.5
OpenAI
2025-02-27
GPT-5 nano
OpenAI
2025-08-07
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 31 common benchmarks
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GPT-4.5
Average Score:55.0%(+46.9%)
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GPT-5 nano
Average Score:8.1%
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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:55.0%(+46.9%)
Providers:1
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GPT-5 nano
Avg Score:8.1%
Providers:2