Comprehensive side-by-side LLM comparison
GPT-5.2 leads with 45.6% higher average benchmark score. GPT-5.2 supports multimodal inputs. Overall, GPT-5.2 is the stronger choice for coding tasks.
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.
OpenAI
GPT-OSS-120B, released by OpenAI in August 2025, is an open-weight large language model with 120 billion parameters distributed under the Apache 2.0 license. It represents OpenAI's entry into the open-source model space, enabling developers to self-host and fine-tune a GPT-5-generation-class model. GPT-OSS-120B targets research applications, on-premises deployments, and custom fine-tuning workflows requiring a large open-weight base model.
4 months newer

GPT-OSS-120B
OpenAI
2025-08

GPT-5.2
OpenAI
2025-12-11
Context window and performance specifications
Average performance across 2 common benchmarks
GPT-5.2
GPT-OSS-120B
Performance comparison across key benchmark categories
GPT-5.2
GPT-OSS-120B
GPT-5.2
2025-08
Available providers and their performance metrics
GPT-5.2
GPT-OSS-120B
Hugging Face
GPT-5.2
GPT-OSS-120B
GPT-5.2
GPT-OSS-120B