GPT-5.2 released, with xhigh reasoning effort and compaction-based context management

Released GPT-5.2, the newest flagship model in the GPT-5 model family. GPT-5.2 shows improvements over the previous GPT-5.1 in:

• General intelligence
• Instruction following
• Accuracy and token efficiency
• Multimodality—especially vision
• Code generation—especially front-end UI creation
• Tool calling and context management in the API
• Spreadsheet understanding and creation.

What's new in 5.2 is a new xhigh reasoning effort level, concise reasoning summaries, and new context management using compaction.