GPT 5.2 — AI Text Generator

About GPT 5.2

Features

• 400,000-token context window with up to 128,000 output tokens.
• Configurable reasoning effort in the API, from none through low, medium, high, and xhigh.
• Accepts text and image input; outputs text.
• Supports function calling, streaming, and structured outputs.
• Knowledge cutoff of August 31, 2025.
• Three ChatGPT tiers (Instant, Thinking, Pro) tuned for speed, depth, and extended reasoning respectively.

What people use it for

• Spreadsheet building and financial modeling, the launch's flagship demonstrations.
• Drafting presentations and long documents from working materials.
• Coding tasks, either directly or via the GPT-5.2-Codex variant.
• Analysis over hundreds of thousands of tokens of context in one pass.
• Multi-step agentic projects that chain tool calls.

Reported strengths

• Scored 70.9% on GDPval, OpenAI's benchmark of real occupational knowledge work, versus 38.8% for GPT-5.1; MacRumors reported it as OpenAI's first model to perform at or above human expert level on that measure.
• Responses containing errors were 30% less common than with GPT-5.1.
• Long-context handling across the full 400K window was a launch focus.
• Wide availability from day one: paid ChatGPT plans and the API simultaneously.

Reported limitations

• The Guardian reported that GPT-5.2 drew on Grokipedia as a source, which researcher Nina Jankowicz criticized as poorly sourced.
• Coverage positioned it for power users, developers, and enterprise agents rather than casual chat, and the strongest variants sit behind paid plans.