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GPT-5 vs o3
Comprehensive side-by-side LLM comparison
GPT-5 leads with 24.2% 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 is a multimodal language model developed by OpenAI. It achieves strong performance with an average score of 70.1% across 35 benchmarks. It excels particularly in SWE-Lancer (IC-Diamond subset) (100.0%), COLLIE (99.0%), Tau2 Telecom (96.7%). 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.
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OpenAI
o3 is a multimodal language model developed by OpenAI. It achieves strong performance with an average score of 67.5% across 22 benchmarks. It excels particularly in COLLIE (98.4%), AIME 2024 (91.6%), ARC-AGI (88.0%). It supports a 300K 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.
3 months newer
o3
OpenAI
2025-04-16
GPT-5
OpenAI
2025-08-07
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 40 common benchmarks
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GPT-5
Average Score:61.3%(+24.2%)
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o3
Average Score:37.1%
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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:61.3%(+24.2%)
Providers:2
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o3
Avg Score:37.1%
Providers:1