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Models·OpenAI·Dec 2025

37. GPT-5.2 / Codex

Expert-level performance across professional tasks

Product Announcement
Summary

Released GPT-5.2 in Instant/Thinking/Pro variants plus GPT-5.2-Codex, delivering significant gains in coding, long-context understanding, agentic tool-calling, and vision. GPT-5.2 Pro is described as the most trustworthy model for complex professional work.

Key Concepts

Three variants: Instant (fast everyday), Thinking (deep reasoning), Pro (highest accuracy)

GPT-5.2 ships in three tiers: Instant for fast everyday work and info-seeking, Thinking for coding, math, and multi-step reasoning, and Pro for the hardest questions where accuracy matters more than speed. Each tier represents a different compute-quality tradeoff.

GPT-5.2-Codex: specialized agentic coding model with context compaction and cybersecurity capabilities

GPT-5.2-Codex is further optimized for agentic coding in Codex, with improvements in long-horizon work through context compaction, stronger performance on large refactors and migrations, improved Windows environment support, and significantly stronger cybersecurity capabilities.

Major gains in general intelligence, long-context understanding, and agentic tool-calling

GPT-5.2 brings significant improvements across coding, math, science, vision, and reasoning. It excels at creating spreadsheets, building presentations, writing code, perceiving images, understanding long contexts, and handling complex multi-step projects.

Connections

37. GPT-5.2 / CodexDec 202536. Introducing gpt-…Aug 202538. GPT-5.4Mar 2026Influenced byInfluences
Influenced by
36. Introducing gpt-oss
Aug 2025
Influences
38. GPT-5.4
Mar 2026