Last refreshed 2026-06-30. Next refresh: weekly.
Why use GPT-5.2 Codex on OpenAI API?
OpenAI API offers GPT-5.2 Codex with pay-as-you-go pricing at $1.75/1M input tokens. OpenAI is a leading AI research and deployment company dedicated to developing safe and beneficial artificial general intelligence (AGI) for humanity.
Compare GPT-5.2 Codex across 3 providers to find the best fit for your use caseSetup recipe
Python + curlpip install openaiexport OPENAI_API_KEY=...import os
from openai import OpenAI
client = OpenAI() # reads OPENAI_API_KEY from env
response = client.chat.completions.create(gpt-5.2-codexRequest example
import os
from openai import OpenAI
client = OpenAI() # reads OPENAI_API_KEY from env
response = client.chat.completions.create(
model="gpt-5.2-codex",
messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)Gotchas
- Use the model slug directly, e.g. "gpt-4o" or "gpt-4.1-mini".
- The examples expect OPENAI_API_KEY; rename it only if your application config maps the new variable.
Compare GPT-5.2 Codex Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| Vercel AI Gateway | $1.75 | $14.00 |
| OpenAI API | $1.75 | $14.00 |
| OpenRouter | $1.75 | $14.00 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $1.75 |
| Output tokens | $14.00 |
Capabilities
About GPT-5.2 Codex
GPT-5.2-Codex is OpenAI's agentic coding model built on GPT-5.2, released December 18, 2025. Optimized for long-horizon professional software engineering tasks including large refactors, multi-file changes, and codebase migrations. Features context compaction for handling tasks exceeding a single context window, enhanced vision for interpreting screenshots, diagrams, and UI, and strengthened safeguards for defensive cybersecurity workflows. Available to paid ChatGPT users and via the Responses API.