GPT-5.2-Codex
VerifiedMultimodal model handling text and images at scale.
About GPT-5.2-Codex
The architecture supports combined text and visual data streams within its large context capacity. OpenAI designed the model as a proprietary offering without released weights. This choice keeps the implementation under company control.
Developers commonly use it for applications that merge lengthy documents with image analysis. The multimodal modality allows processing of mixed inputs in a single session. Access remains limited to authorized API channels.
Capabilities
How GPT-5.2-Codex compares
GPT-5.2-Codex (striped bar) vs other multimodal on intelligence, speed and price.
Price
USD per 1M output tokens · Lower is better · GPT-5.2-Codex ranks #84 of 110
Nova Premier 1.0Sources: Artificial Analysis (intelligence, speed) · OpenRouter (price).
Best for
Large-Scale Codebase Refactoring
The model processes entire repositories within its 400000-token context to identify dependencies and suggest coordinated changes across multiple files.
Multimodal Technical Documentation Analysis
It combines vision understanding with text to review diagrams, screenshots, and accompanying specifications in product requirement documents.
Complex Instruction-Driven Application Prototyping
Developers use it to follow detailed, multi-step prompts for generating and iterating on full-stack code while maintaining consistency over long sessions.
Strengths & limitations
Strengths
- +Very large context window for extended inputs
- +Strong coding specialization
- +Seamless integration of text and image data
Limitations
- –Restricted to text and image modalities
- –High resource demands at maximum context length
- –No native support for audio or video
Cost calculator
Estimate what GPT-5.2-Codex would cost for your usage.
Based on GPT-5.2-Codex's $1.75/1M input · $14.00/1M output. Estimate only — actual cost varies by provider and caching.
Quick start
OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. Only the model slug changes between models.
import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://openrouter.ai/api/v1",
apiKey: process.env.OPENROUTER_API_KEY,
});
const completion = await client.chat.completions.create({
model: "openai/gpt-5.2-codex",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(completion.choices[0].message.content);Model slug: openai/gpt-5.2-codex
Editor's verdict
GPT-5.2-Codex is OpenAI's proprietary multimodal with a 400K-token context window.
At $14.00 per 1M output tokens, it is premium-priced for its class.
It is available through OpenAI's API and aggregators like OpenRouter.
Best suited to very large context window for extended inputs and strong coding specialization.
Frequently asked questions
The model provides a context window of 400000 tokens for handling extended inputs.
User reviews
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