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GPT-4.5 vs o3
Comprehensive side-by-side LLM comparison
o3 leads with 24.5% higher average benchmark score. o3 offers 167.9K more tokens in context window than GPT-4.5. o3 is $215.00 cheaper per million tokens. Overall, o3 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
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.
1 month newer
GPT-4.5
OpenAI
2025-02-27
o3
OpenAI
2025-04-16
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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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o3
Input:$2.00
Output:$8.00($215.00 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 7 common benchmarks
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GPT-4.5
Average Score:59.9%
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o3
Average Score:84.4%(+24.5%)
Performance comparison across key benchmark categories
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GPT-4.5
Coding38.0%
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o3
Coding69.1%(+31.1%)
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Knowledge Cutoff
Training data recency comparison
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-4.5
1 providers
OpenAI
Throughput: 50 tok/s
Latency: 20ms
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o3
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GPT-4.5
Avg Score:59.9%
Providers:1
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o3
Avg Score:84.4%(+24.5%)
Providers:1