GPT-5.2

by OpenAI

All OpenAI releases

GPT-5.2 is OpenAI's flagship model for coding and agentic tasks, with strong reasoning and a 272,000-token context window. It combines vision input, reasoning, tool use, and structured outputs for complex, multi-step workflows where the model plans, weighs alternatives, and takes actions. It is built for long-horizon problem-solving, code architecture work, and tool orchestration, performing well on tasks that need both reasoning and autonomous execution.

Key info

Input
Output
Features
Context window
272K
Max output
128K
Input price
$1.75 /1M
Output price
$14.00 /1M
Released
  • US residency available
  • No training by default
  • GDPR DPA available

Available routes

GPT-5.2 runs on 1 route through the Opper gateway. Compare residency, ZDR, and training posture at a glance — full data-handling detail per route below.

ProviderRegionZero data retentionTrainingInputOutput
USNot by defaultNo$1.75$14.00

Uptime and availability

GPT-5.2 runs on a single route through the Opper gateway today, so its availability is that provider's availability.

96.06%route uptime, last 30 days
Single route, no failover target within this model.

Name a second model in the same request and the gateway tries it on retriable errors, so a busy hour never has to reach your users. Set up a fallback chain.

Measured over the last 30 days from each provider's official status feed via StatusGator. Refreshed hourly. See uptime for every provider Opper monitors.

Data handling per route

Each route hosting GPT-5.2 has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.

OpenAI United States🇺🇸

Zero data retention is not on by default — abuse monitoring, 30-day retention. No training on customer data. US; SCCs; DPA available.

Zero data retention
Not by default — abuse monitoring, 30-day retention. Derived from the logging and moderation facts.
Training
No training on customer data.
Logging
Abuse monitoring (30-day retention)
Moderation
Not established
Caching
Not established
Subprocessor access
Not established
GDPR DPA
DPA available
Transfer mechanism
SCCs

Benchmarks

Independent benchmark scores — composite indices for reasoning, coding, and math, plus individual eval scores where available.

Intelligence Index35.0
Math Index99.0
Reasoning & knowledge
MMLU-Pro
87%
GPQA Diamond
90%
Humanity's Last Exam
38%
Long-context reasoning
83%
Coding
LiveCodeBench
89%
Agentic & tool use
Terminal-Bench Hard
47%
τ²-Bench Telecom
85%
Math & instruction following
AIME 2025
99%
IFBench
75%

Get started

Call GPT-5.2 through the Opper gateway with one API key. Let your coding agent set it up, or call it directly — Opper is drop-in compatible with the OpenAI, Anthropic, and Google AI SDKs.

Set it up with your agent

Copy this and paste it into a coding agent like Claude Code, Cursor or Codex and it'll wire up Opper for you.

Or call it directly

import OpenAI from "openai";
const client = new OpenAI({
apiKey: process.env.OPPER_API_KEY,
baseURL: "https://api.opper.ai/v3/compat",
});
const completion = await client.chat.completions.create({
model: "openai/gpt-5.2",
messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);

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Side-by-side on privacy, EU hosting, pricing, and benchmarks.

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