How do I use GPT-5.2 Codex through YepAPI?

Sign up for a free API key, then send requests to the /v1/ai/chat endpoint.

OpenAIText Generation/v1/ai/chat

GPT-5.2 Codex

Access GPT-5.2 Codex through one API key. Reliable coding model with massive context.

OpenAI's previous generation coding model. Reliable code generation with 400K context.

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2,400+

Developers

1.2M+

API calls served

100+

Endpoints

$0.01

Per call

Yep, that's it.

Try it live

Send a message and see GPT-5.2 Codex respond in real time.

POST/v1/ai/chatopenai/gpt-5.2-codex

Message *

Max Tokens

Maximum tokens in the response.

Stream

Real-time tokens

Hit "Send Request" to see the response

Context Window

400K tokens

Max Output

128K tokens

Input Price

$2.45 / 1M tokens

Output Price

$19.60 / 1M tokens

Strengths

✓

Coding specialist

GPT-5.2 Codex is OpenAI's previous-generation coding model, tuned for reliable code generation, refactoring, and debugging.

✓

400K context

A 400,000-token context window lets it read large, multi-file codebases before producing or changing code.

✓

128K output

Up to 128,000 output tokens per response allow it to generate complete files or large changes in a single call.

✓

Proven reliability

As a mature release it behaves predictably, which matters for automated coding pipelines and CI integration.

Quick start

Copy this snippet and start making calls with GPT-5.2 Codex.

const res = await fetch('https://api.yepapi.com/v1/ai/chat', {
  method: 'POST',
  headers: {
    'x-api-key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "model": "openai/gpt-5.2-codex",
    "messages": [
      {
        "role": "user",
        "content": "Explain API gateways in 2 sentences."
      }
    ],
    "maxTokens": 256
  }),
});
const { data } = await res.json();
console.log(data.message.content);

Why use GPT-5.2 Codex through YepAPI?

✓One API key for all models — no separate accounts

✓OpenAI SDK compatible — just change the base URL

✓No monthly minimums — pay per token

✓Switch models with one line of code

✓Full provider passthrough — citations, search results, and all extras included

✓Streaming and non-streaming support on every model

✓Works with Cursor, Claude, LangChain, and any LLM tool

✓Unified billing across all providers

GPT-5.2 Codex API: a reliable coding model with massive context

GPT-5.2 Codex is OpenAI's previous-generation coding model, pairing a 400K-token context window with up to 128K output tokens for substantial code tasks. At $2.45 per 1M input tokens and $19.60 per 1M output tokens, it offers dependable, lower-cost code generation for production workflows.

Through YepAPI you call GPT-5.2 Codex with a single OpenAI-compatible API key. The same key also reaches other models and YepAPI's SEO, SERP, and web-scraping endpoints, so coding agents can write code and gather data side by side.

What is GPT-5.2 Codex?

GPT-5.2 Codex is OpenAI's previous-generation coding-specialized model, tuned for code generation, refactoring, and debugging. Its emphasis is reliability: as a mature release it behaves predictably, which is valuable when code feeds directly into pipelines. It carries a 400,000-token context window so it can read large multi-file codebases, and up to 128,000 output tokens so it can return complete files or large changes in one response. Priced at $2.45 per 1M input and $19.60 per 1M output tokens, it offers a stable, cost-effective coding engine below the newest generation of coders.

Build with GPT-5.2 Codex via YepAPI

Send requests to the OpenAI-compatible /v1/ai/chat endpoint with your YepAPI key. The Chat Completions schema lets existing SDKs and coding agents work after changing the base URL and model name. Use it for code generation, automated reviews, and refactors where consistent behavior matters. One key also covers other models plus SEO, SERP, and scraping APIs, so a coding agent can both produce code and fetch documentation or data from the web through one integration.

GPT-5.2 Codex API pricing — $2.45 / $19.60 per 1M tokens

GPT-5.2 Codex costs $2.45 per 1M input tokens and $19.60 per 1M output tokens. Its 400K context lets you load large codebases affordably on the input side, while the previous-generation rate keeps high-volume generation reasonable. Billing is per token, so reviewing a file costs cents and you pay only for the code you actually generate or analyze.

GPT-5.2 Codex for reliable code generation

The model fits teams that prize stability in automated coding: CI-integrated generation, batch refactors, and review bots where predictable output reduces risk. Its 400K context allows it to consider a whole module and its tests, and the 128K output ceiling means large changes return in one pass. When you need a dependable, well-tested coder for production rather than the absolute newest one, GPT-5.2 Codex is a solid pick.

Try GPT-5.2 Codex free

New YepAPI accounts include $5 in free credit with no card required. That is enough to run real generation and refactoring tasks with GPT-5.2 Codex against your own code before you decide to depend on it.

Start generating in 30 seconds

$5 free credit on signup. No credit card required. Pay per call.

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What developers say

“Switched from SerpAPI and cut our SERP costs by 80%. Same data quality, way simpler billing.”
Marcus T.
SEO Platform Founder

“One API key for AI models, SERP data, and web scraping. Saved us from managing 4 separate providers.”
Priya S.
Full-Stack Developer

“The $5 free credit let us prototype our entire rank tracking feature before committing. No other API does that.”
Jake R.
Indie Hacker

Frequently asked questions

OpenAI's previous generation coding model. Reliable code generation with 400K context.

Input tokens cost $2.45 per 1M tokens and output tokens cost $19.60 per 1M tokens through YepAPI. No monthly minimums — you only pay for what you use.

GPT-5.2 Codex supports a 400K token context window with up to 128K output tokens per request.