openai/gpt-5.2-codexGPT-5.2 Codex is OpenAI’s proprietary AI model, released Dec 18, 2025. It costs $1.75/M input and $14/M output tokens, and handles a 400K-token context window. Its strongest use case is reasoning & knowledge, where it ranks in the 69th percentile of the models Model Beat tracks.
GPT-5.2-Codex is an upgraded version of GPT-5.1-Codex optimized for software engineering and coding workflows.
Scores on standardized evaluations. Higher is better — and rank shows where GPT-5.2 Codex lands among all models tracked on Model Beat.
Graduate-level scientific reasoning
Frontier of human expert knowledge
Scientific research coding
Human-rated web development
Multi-step agentic tasks
Command-line agentic tasks
Tool-agent-user reliability
GPT-5.2-Codex is an upgraded version of GPT-5.1-Codex optimized for software engineering and coding workflows.
GPT-5.2 Codex is an AI model developed by OpenAI, part of the GPT family, released Dec 18, 2025.
GPT-5.2 Codex is served from $1.75 per million input tokens and $14 per million output tokens (cheapest credible provider on OpenRouter: OpenAI).
GPT-5.2 Codex supports a context window of up to 400K tokens.
On standardized evaluations tracked by Epoch AI, GPT-5.2 Codex scores 54.6% on SciCode, 66.5% on Terminal-Bench, 89.9% on GPQA Diamond.
GPT-5.2 Codex is a proprietary model (API access), available through its provider's API rather than as a downloadable open-weight model.
Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Sep 17, 2026.