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GPT-5.2 vs o3 mini
Comprehensive side-by-side LLM comparison
GPT-5.2 leads with 76.4% higher average benchmark score. GPT-5.2 supports multimodal inputs. Overall, GPT-5.2 is the stronger choice for coding tasks.
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OpenAI
GPT-5.2, released by OpenAI on December 11, 2025, is a large language model from the GPT-5 family that improves on GPT-5 in general intelligence, long-context understanding, agentic tool-calling, and vision. It features a 400K token context window, 128K maximum output tokens, and a knowledge cutoff of August 2025. GPT-5.2 targets long-context coding tasks, extended document analysis, and complex agentic workflows requiring reliable instruction following.
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OpenAI
OpenAI o3 mini, released by OpenAI in January 2025, is a compact reasoning model from the o3 family designed for efficient, cost-effective STEM problem-solving. It features a 200K token context window and adjustable chain-of-thought effort settings, allowing developers to trade reasoning depth for speed. o3 mini targets science, mathematics, and coding applications where lower inference cost and faster response times are a priority.
10 months newer
o3 mini
OpenAI
2025-01-31
GPT-5.2
OpenAI
2025-12-11
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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GPT-5.2
Average Score:77.9%(+76.4%)
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o3 mini
Average Score:1.5%
Performance comparison across key benchmark categories
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GPT-5.2
Agents77.9%(+76.4%)
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o3 mini
Agents1.5%
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Knowledge Cutoff
Training data recency comparison
GPT-5.2
2025-08
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
0 providers
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o3 mini
1 providers
OpenAI
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GPT-5.2
Avg Score:77.9%(+76.4%)
Providers:0
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o3 mini
Avg Score:1.5%
Providers:1