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GPT-5 Pro vs o3
Comprehensive side-by-side LLM comparison
GPT-5 Pro leads with 12.4% higher average benchmark score. Overall, GPT-5 Pro is the stronger choice for coding tasks.
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OpenAI
GPT-5 Pro is an extended-reasoning variant from the GPT-5 family that applies more compute per response for deeper, more thorough answers on complex problems. It features the same 400K token context window and multimodal capabilities as GPT-5, with additional reasoning depth suited to research-grade analysis, advanced coding, and tasks requiring comprehensive, accurate outputs.
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OpenAI
OpenAI o3, released by OpenAI in April 2025, is a large reasoning model that applies extended chain-of-thought processing to deliver improved performance on complex math, science, and coding tasks. It features a 200K token context window and native image understanding, with demonstrated strong results on mathematics and software engineering benchmarks. o3 targets demanding analytical and engineering tasks where deliberate, multi-step reasoning produces significantly better outcomes than direct generation.
3 months newer
o3
OpenAI
2025-04-16
GPT-5 Pro
OpenAI
2025-08-07
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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GPT-5 Pro
Average Score:31.6%(+12.4%)
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o3
Average Score:19.2%
Performance comparison across key benchmark categories
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GPT-5 Pro
Reasoning31.6%(+12.4%)
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o3
Reasoning19.2%
Provider Availability & Performance
Available providers and their performance metrics
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GPT-5 Pro
0 providers
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o3
1 providers
OpenAI
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GPT-5 Pro
Avg Score:31.6%(+12.4%)
Providers:0
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o3
Avg Score:19.2%
Providers:1