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GPT-5 vs o3
Comprehensive side-by-side LLM comparison
GPT-5 leads with 6.1% higher average benchmark score. GPT-5 offers 228.0K more tokens in context window than o3. o3 is $1.25 cheaper per million tokens. Overall, GPT-5 is the stronger choice for coding tasks.
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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.
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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.
3 months newer
o3
OpenAI
2025-04-16
GPT-5
OpenAI
2025-08-07
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Pricing Comparison
Cost per million tokens (USD)
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GPT-5
Input:$1.25
Output:$10.00
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o3
Input:$2.00
Output:$8.00($1.25 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 17 common benchmarks
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GPT-5
Average Score:73.7%(+6.1%)
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o3
Average Score:67.6%
Performance comparison across key benchmark categories
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GPT-5
Coding74.9%(+5.8%)
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o3
Coding69.1%
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Knowledge Cutoff
Training data recency comparison
o3
2024-05-31
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-5
2 providers
OpenAI
Throughput: 100 tok/s
Latency: 2ms
ZeroEval
Throughput: 100 tok/s
Latency: 2ms
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GPT-5
Avg Score:73.7%(+6.1%)
Providers:2
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o3
Avg Score:67.6%
Providers:1