OpenAI

GPT-5.2 Codex API

US OpenAI | released 2026-03
Try in Playground → Get API key

GPT-5.2 Codex is OpenAI’s coding-specialized model, fine-tuned for repository-scale code generation, debugging, and agentic software engineering. It powers many AI coding tools and IDE integrations.

CodeReasoningTool UseJSON Mode

Pricing (official list, per 1M tokens)

Input
$1.75/M
Output
$14.00/M

Specifications

Context window400K tokens Max output16.384K tokens Input modalitiesText StreamingYes APIOpenAI-compatible

How to use GPT-5.2 Codex

Drop-in OpenAI replacement. Change only the base_url and model.

# Python -pip install openai
from openai import OpenAI

client = OpenAI(
    base_url="https://meshtok.com/v1",
    api_key="sk-your-MeshTok-key",
)

resp = client.chat.completions.create(
    model="openai/gpt-5.2-codex",
    messages=[{"role":"user","content":"Hello!"}],
)
print(resp.choices[0].message.content)
# cURL
curl https://meshtok.com/v1/chat/completions \
  -H "Authorization: Bearer sk-your-MeshTok-key" \
  -H "Content-Type: application/json" \
  -d '{"model":"openai/gpt-5.2-codex","messages":[{"role":"user","content":"Hello!"}]}'

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