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 2 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 |
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.
FAQ
What does GPT-5.2 Codex cost on OpenAI API?
On OpenAI API, GPT-5.2 Codex costs $1.75 per 1M input tokens and $14.00 per 1M output tokens.
What is the context window for GPT-5.2 Codex on OpenAI API?
GPT-5.2 Codex supports a 400k token context window on OpenAI API.
How does OpenAI API compare to other GPT-5.2 Codex providers?
GPT-5.2 Codex is available from 2 providers. The cheapest input pricing is $1.75/1M tokens from Vercel AI Gateway.
What API model ID do I use for GPT-5.2 Codex on OpenAI API?
Use the model ID gpt-5.2-codex when calling OpenAI API's API.
Who created GPT-5.2 Codex?
GPT-5.2 Codex was created by OpenAI as part of the GPT-5 model family.
Is GPT-5.2 Codex open source?
GPT-5.2 Codex is not open source; the seed data lists it as proprietary.