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GPT-5.2 vs o1
Comprehensive side-by-side LLM comparison
GPT-5.2 leads with 71.6% higher average benchmark score. 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 o1, released by OpenAI in December 2024, is a reasoning-focused large language model that applies extended chain-of-thought processing before generating responses. It features a 200K token context window and native image understanding, demonstrating strong performance on STEM benchmarks requiring multi-step reasoning. o1 targets mathematics, science, and coding tasks where careful deliberation over the problem produces more accurate outputs than direct generation.
1 year newer
o1
OpenAI
2024-12-05
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%(+71.6%)
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o1
Average Score:6.3%
Performance comparison across key benchmark categories
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GPT-5.2
Agents77.9%(+71.6%)
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o1
Agents6.3%
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Knowledge Cutoff
Training data recency comparison
o1
2023-10
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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o1
1 providers
OpenAI
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GPT-5.2
Avg Score:77.9%(+71.6%)
Providers:0
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o1
Avg Score:6.3%
Providers:1