How does GPT 5.2 improve over GPT-5.1?

It advances reasoning, coding, and multimodal capabilities over GPT-5.1, representing a generational improvement in the GPT series.

What context window does GPT 5.2 support?

400K tokens, supporting extensive document and codebase processing.

Should I migrate from GPT-5 to GPT 5.2?

If your application benefits from improved reasoning and coding quality, yes. Test with your specific workloads to confirm the improvement justifies any pricing differences.

Does GPT 5.2 support function calling and structured outputs?

Yes. It supports the full API feature set including function calling, structured outputs, vision, and system messages.

How does AI Gateway handle authentication for GPT 5.2?

AI Gateway accepts a single API key or OIDC token for all requests. You don't embed OpenAI credentials in your application; AI Gateway routes and authenticates on your behalf.

What are typical latency characteristics?

This page shows live throughput and time-to-first-token metrics measured across real AI Gateway traffic.

OpenAI

GPT 5.2

GPT 5.2 is the standard tier of the GPT-5.2 model family, advancing the GPT-5 series with improved reasoning, coding, and multimodal capabilities across the board. Your use is subject to OpenAI's Terms & Privacy Policies.

View API reference

Input and output price: Prices from: Input $1.75, Output $14, Per 1M tokens
24h uptime: Loading AI Gateway uptime

Get API key Read the docs

import { streamText } from 'ai'

const result = streamText({
  model: 'openai/gpt-5.2',
  prompt: 'Why is the sky blue?'
})

Read docs

Overview Playground Providers Uptime Status Throughput Latency API Similar About FAQ

Copy link to headingPlayground

Try out GPT 5.2 by OpenAI. Usage is billed to your team at API rates. Free users (those who haven't made a payment) get $5 of credits every 30 days.

GPT 5.2

Copy link to headingProviders

Route requests across multiple providers. Copy a provider slug to set your preference. Visit the docs for more info. Using a provider means you agree to their terms, listed under Legal.

Checking availability for your team

Provider

Context	Max Output	Latency	Throughput	Input	Output	Cache	Web Search	Capabilities	ZDR	No Training	Free Tier	Release Date

Azure

Legal:Terms•Privacy

400K

128K

1.6 s

82 tps

$1.75/M

$14/M

Read$0.18/M

$14/K

12/11/2025

OpenAI

Legal:Terms•Privacy

400K

128K

0.7 s

60 tps

$1.75/M+2 more

$14/M+2 more

Read$0.18/M

$10/K

12/11/2025

Getting started

Call GPT 5.2 through AI Gateway with the AI SDK generateText and streamText functions, or through the OpenAI Chat Completions, OpenAI Responses, and Anthropic Messages APIs by changing the base URL. AI Gateway authenticates the request and routes it to an available provider.

Install the AI SDK (pnpm add ai dotenv), create an API key from the API Keys page, and set it as AI_GATEWAY_API_KEY in your environment. Full setup is covered in the text generation quickstart.

index.ts

import { generateText } from 'ai';
import 'dotenv/config';

async function main() {
  const result = await generateText({
    model: 'openai/gpt-5.2',
    prompt: 'Why is the sky blue?',
  });

  console.log(result.text);
}

main().catch(console.error);

Top-level parameters

The same GPT 5.2 request in each API format AI Gateway supports.

top-level-params.ts

import { generateText } from 'ai';
import 'dotenv/config';

async function main() {
  const result = await generateText({
    model: 'openai/gpt-5.2',
    system: 'You are a concise technical assistant.',
    prompt: 'Summarize the tradeoffs between static generation and SSR.',
    maxOutputTokens: 1024,
  });

  console.log(result.text);
}

main().catch(console.error);

Standard parameters like prompt, messages, temperature, and tools work as documented in the AI SDK docs. These are the parameters with model-specific behavior.

Parameter	Type	Required	Description
`model`	`string`	Yes	Model ID in the form `creator/model`, e.g. `openai/gpt-5.2`. AI Gateway routes the request to an available provider.
`maxOutputTokens`	`number`	No	Hard cap on generated tokens. GPT 5.2 supports up to `128,000` output tokens. Reasoning tokens count toward this limit.
`reasoning`	`'provider-default' \| 'none' \| 'minimal' \| 'low' \| 'medium' \| 'high' \| 'xhigh'`	No	Provider-agnostic reasoning effort, available in AI SDK 7 or later. Maps to the provider’s native reasoning configuration; reasoning settings under `providerOptions` take precedence when both are set. See the Reasoning section below.
`providerOptions`	`Record<string, JSONValue>`	No	AI Gateway routing options under `gateway`, plus any provider-native options under the provider’s own namespace — see the table below.

Input limits

Input	Formats	Sources	Max count	Max size	Limits
Text	—	—	—	—	Prompt and response share the 400K-token context window
Image	—	URL, base64, Uint8Array	—	—	Sent as image parts in messages; counts as input tokens
PDF	—	URL, base64, Uint8Array	—	—	Sent as file parts in messages; counts as input tokens

Provider options

Set AI Gateway routing options under providerOptions.gateway. For provider-specific options, pass them under the provider’s namespace as documented by the AI SDK.

Learn more in the AI SDK openai provider docs.

provider-options.ts

import { generateText } from 'ai';
import 'dotenv/config';

async function main() {
  const result = await generateText({
    model: 'openai/gpt-5.2',
    prompt: 'Why is the sky blue?',
    providerOptions: {
      gateway: {
        only: ['azure', 'openai'],
      },
    },
  });

  console.log(result.text);
}

main().catch(console.error);

These AI Gateway routing options apply to every model. Provider-specific options pass through under the provider’s own namespace (for example providerOptions.anthropic) exactly as documented by the AI SDK.

Parameter	Type	Required	Description
`providerOptions.gateway.only`	`string[]`	No	Restrict routing to these provider slugs. Requests fail over only within the listed providers.
`providerOptions.gateway.order`	`string[]`	No	Preferred provider order. Listed providers are tried first; unlisted providers remain available as fallbacks.
`providerOptions.gateway.sort`	`'cost' \| 'ttft' \| 'tps'`	No	Rank candidate providers by price, time to first token, or tokens per second instead of the default routing order.
`providerOptions.gateway.zeroDataRetention`	`boolean`	No	Route only to providers with a zero-data-retention policy for this model.

Routing across providers

AI Gateway serves the same model through multiple providers and fails over automatically. order expresses a preference while keeping every provider eligible; only is a hard allowlist — if none of the listed providers are available the request fails instead of falling back.

Options under a provider's own namespace (for example providerOptions.anthropic) are forwarded to that provider with the request. Providers ignore option namespaces that don't apply to them, so it is safe to set provider options alongside gateway routing options.

Reasoning

AI Gateway bridges reasoning across every API format. The AI SDK exposes a provider-agnostic top-level reasoning level (none, minimal, low, medium, high, or xhigh); the Chat Completions and Responses formats take the same effort under reasoning.effort; and the Anthropic Messages format uses a native thinking token budget. Whichever you send, the gateway maps it to the target model’s native configuration, converting between effort levels and token budgets as needed. Reasoning-related settings under providerOptions take full precedence over the top-level reasoning value and are never merged. Reasoning tokens typically count toward your output-token usage, though how they’re reported and billed varies by provider.

Learn more in the AI Gateway reasoning guide.

reasoning.ts

import { generateText } from 'ai';
import 'dotenv/config';

async function main() {
  const result = await generateText({
    model: 'openai/gpt-5.2',
    prompt: 'Explain the Monty Hall problem step by step.',
    reasoning: 'high',
  });

  console.log(result.text);
}

main().catch(console.error);

Image input

Send images alongside text as message parts. Images count as input tokens.

image-input.ts

import { generateText } from 'ai';
import 'dotenv/config';

async function main() {
  const result = await generateText({
    model: 'openai/gpt-5.2',
    messages: [
      {
        role: 'user',
        content: [
          { type: 'text', text: 'Describe this image.' },
          { type: 'image', image: 'https://example.com/photo.jpg' },
        ],
      },
    ],
  });

  console.log(result.text);
}

main().catch(console.error);

PDF input

Attach PDFs as file parts. Their contents count as input tokens.

pdf-input.ts

import { generateText } from 'ai';
import 'dotenv/config';

async function main() {
  const result = await generateText({
    model: 'openai/gpt-5.2',
    messages: [
      {
        role: 'user',
        content: [
          { type: 'text', text: 'Summarize this document.' },
          {
            type: 'file',
            mediaType: 'application/pdf',
            data: 'https://example.com/document.pdf',
          },
        ],
      },
    ],
  });

  console.log(result.text);
}

main().catch(console.error);

Tool calling

Expose tools the model can call. Define each tool’s inputs with a Zod schema.

tool-calling.ts

import { generateText, tool } from 'ai';
import { z } from 'zod';
import 'dotenv/config';

async function main() {
  const result = await generateText({
    model: 'openai/gpt-5.2',
    prompt: 'What is the weather in San Francisco?',
    tools: {
      getWeather: tool({
        description: 'Get the current weather for a location',
        inputSchema: z.object({ location: z.string() }),
        execute: async ({ location }) => ({ location, temperatureC: 18 }),
      }),
    },
  });

  console.log(result.text);
}

main().catch(console.error);

Copy link to headingMore models by OpenAI

Model

Context	Latency	Throughput	Input	Output	Cache	Web Search	Capabilities	Providers	ZDR	No Training	Free Tier	Release Date

openai/gpt-6-astra

1.1M

3.5 s

72 tps

$10/M+2 more

$50/M+2 more

Read$1/M

Write$12.50/M

$10/K

09/04/2026

openai/gpt-5.6-luna

1.1M

2.2 s

146 tps

$0.20/M+2 more

$1.20/M+2 more

Read$0.02/M

Write$0.25/M

$10/K

07/09/2026

openai/gpt-5.6-sol

1.1M

5.9 s

69 tps

$4/M+2 more

$20/M+2 more

Read$0.40/M

Write$5/M

$10/K

07/09/2026

openai/gpt-5.6-terra

1.1M

1.9 s

85 tps

$2/M+2 more

$12/M+2 more

Read$0.20/M

Write$2.50/M

$10/K

07/09/2026

openai/gpt-5-nano

400K

0.9 s

159 tps

$0.05/M

$0.40/M

Read$0.005/M

$14/K

08/07/2025

openai/gpt-5-mini

400K

3.2 s

119 tps

$0.25/M+1 more

$2/M+1 more

Read$0.03/M

$14/K

08/07/2025

Copy link to headingAbout GPT 5.2

GPT 5.2 became available on December 11, 2025 on AI Gateway as the GPT-5.2 generation of OpenAI's general-purpose model series. It builds on the GPT-5 and GPT-5.1 generations with further improvements across reasoning depth, coding capability, instruction following, and multimodal understanding.

As the standard tier in the GPT-5.2 family, it provides the balance of capability and accessibility that most demanding applications require. The context window of 400K tokens supports extensive inputs, and the model handles text, image, and mixed-modality inputs with GPT-5.2 generation quality.

If you already use GPT-5 or GPT-5.1, GPT 5.2 offers an upgrade path with measurable improvements across key benchmarks.

Copy link to headingWhat To Consider When Choosing a Provider

Configuration: GPT 5.2 builds on the GPT-5 and GPT-5.1 generations with further improvements across reasoning, coding, and instruction following.
Configuration: It launches alongside chat, codex, and pro variants, each specialized for different workloads while sharing the same generational improvements.
Zero Data Retention: Zero Data Retention is available for this model. It is offered on a per-provider and model basis. See the documentation for details.
Authentication: AI Gateway authenticates requests using an API key or OIDC token. You do not need to manage provider credentials directly.

Copy link to headingWhen to Use GPT 5.2

Best for

Complex reasoning: Analytical and strategic tasks that benefit from GPT-5.2 generation improvements
Advanced code generation: Strong coding performance for development tools and agents
Multimodal applications: Vision, text, and mixed-modality workflows with GPT-5.2 generation improvements
Research and analysis: Deep document analysis, research synthesis, and complex question answering
New projects: Applications that benefit from GPT-5.2 generation capability over GPT-5 or GPT-5.1

Consider alternatives when

Cost optimization: GPT-5 mini or GPT-5.1 instant for production workloads where cost efficiency matters
Specialized coding: GPT-5.2 codex for autonomous software engineering workflows
Pure reasoning: O3 for chain-of-thought mathematical and scientific reasoning
High-volume lightweight tasks: Nano-tier models for classification and routing

Copy link to headingConclusion

GPT 5.2 advances the GPT-5 series with measurable improvements in reasoning, coding, and multimodal capability. Available through AI Gateway, it is the standard tier of the GPT-5.2 family for general-purpose workloads.

Copy link to headingFrequently Asked Questions

How does GPT 5.2 improve over GPT-5.1?
It advances reasoning, coding, and multimodal capabilities over GPT-5.1, representing a generational improvement in the GPT series.
What context window does GPT 5.2 support?
400K tokens, supporting extensive document and codebase processing.
Should I migrate from GPT-5 to GPT 5.2?
If your application benefits from improved reasoning and coding quality, yes. Test with your specific workloads to confirm the improvement justifies any pricing differences.
Does GPT 5.2 support function calling and structured outputs?
Yes. It supports the full API feature set including function calling, structured outputs, vision, and system messages.
How does AI Gateway handle authentication for GPT 5.2?
AI Gateway accepts a single API key or OIDC token for all requests. You don't embed OpenAI credentials in your application; AI Gateway routes and authenticates on your behalf.
What are typical latency characteristics?
This page shows live throughput and time-to-first-token metrics measured across real AI Gateway traffic.

GPT 5.2

Copy link to headingPlayground

Copy link to headingProviders

Copy link to headingUptime24 hours

Copy link to headingThroughput24 hours

Copy link to headingLatency24 hours

Getting started

Top-level parameters

Input limits

Provider options

Routing across providers

Reasoning

Image input

PDF input

Tool calling

Copy link to headingMore models by OpenAI

Copy link to headingAbout GPT 5.2

Copy link to headingWhat To Consider When Choosing a Provider

Copy link to headingWhen to Use GPT 5.2

Best for

Consider alternatives when

Copy link to headingConclusion

Copy link to headingFrequently Asked Questions