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GPT-4.5 vs GPT-5
Comprehensive side-by-side LLM comparison
GPT-5 leads with 22.9% higher average benchmark score. GPT-5 offers 395.9K more tokens in context window than GPT-4.5. GPT-5 is $213.75 cheaper per million tokens. Overall, GPT-5 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 represents the next generation of OpenAI's foundational models, developed to advance the frontier of AI capabilities in reasoning, knowledge, and general intelligence. Built to push beyond the limitations of GPT-4, it incorporates architectural and training improvements designed to enhance performance across diverse tasks and domains.
5 months newer
GPT-4.5
OpenAI
2025-02-27
GPT-5
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
Input:$1.25
Output:$10.00($213.75 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 13 common benchmarks
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GPT-4.5
Average Score:61.1%
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GPT-5
Average Score:83.9%(+22.9%)
Performance comparison across key benchmark categories
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GPT-4.5
Coding38.0%
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GPT-5
Coding74.9%(+36.9%)
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Knowledge Cutoff
Training data recency comparison
GPT-5
2024-09-30
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
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GPT-4.5
Avg Score:61.1%
Providers:1
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GPT-5
Avg Score:83.9%(+22.9%)
Providers:2