OpenAI · MultimodalReleased 2025-12-18

gpt-5.2-codex

openai/gpt-5.2-codex id

GPT‑5.2-Codex is a version of GPT‑5.2⁠ further optimized for agentic coding in Codex, including improvements on long-horizon work through context compaction, stronger performance on large code changes like refactors and migrations, improved performance in Windows environments, and significantly stronger cybersecurity capabilities.

Tool useReasoningChatWeb search

Type

Use gpt-5.2-codex

# Drop-in OpenAI-compatible client
$ import { generateText } from 'ai'
$ 
$ const { text } = await generateText({
$   model: 'openai/gpt-5.2-codex',
$   baseURL: 'https://synapse.garden/api/v1',
$   apiKey: process.env.MG_KEY,
$   prompt: 'Why is the sky blue?',
$ })

400K

CONTEXT WINDOW

128K

MAX OUTPUT

$1.93/M

INPUT · PER M

$15.40/M

OUTPUT · PER M

PRICING

List prices, every modality.

Rate	Per million tokens · USD
Input	$1.93/M
Output	$15.40/M
Cache read	$0.193/M

Honest list pricesHow we calculate prices

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Input

Output

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FAQ · GPT-5.2-CODEX

Frequently asked

01 / 04

How do I call gpt-5.2-codex from my code?

Use the OpenAI or Anthropic SDK and point baseURL at https://synapse.garden/api/v1. Set model: ‘openai/gpt-5.2-codex’ and supply your Synapse Garden API key. No code changes beyond the base URL.

02 / 04

How much does gpt-5.2-codex cost?

Input: $1.93/M per million tokens. Output: $15.40/M per million tokens. The free tier includes a million tokens every month at no cost.

03 / 04

What's the context window for gpt-5.2-codex?

gpt-5.2-codex supports a context window of 400K tokens, with a maximum output of 128K tokens.

04 / 04

Do I need a separate Anthropic or OpenAI account?

No. Synapse Garden is the single API surface — one key gives you OpenAI, Anthropic, Google, Meta, Mistral, DeepSeek, xAI, Cohere, and more. Billing, rate limits, and audit logs are unified.

READY

Try gpt-5.2-codex in three minutes.

Sign up, create a key, drop our base URL into your existing client. The free tier includes a million tokens every month — no credit card.

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