What is OpenAI: GPT-5.2's context window?

OpenAI: GPT-5.2 supports a context window of 512,000 tokens, allowing you to process large documents and maintain long conversations.

How to use OpenAI: GPT-5.2 API via Ofox?

Simply set your base URL to https://api.ofox.run/v1 and use your Ofox API key. The API is OpenAI-compatible — just change the base URL and API key in your existing code.

OpenAI: GPT-5.2

Name: OpenAI: GPT-5.2
Brand: openai
Price: 1.75 USD
Availability: InStock

Chat-20%

openai/gpt-5.2

Compare Try in Playground Get started

GPT-5.2 is OpenAI's December 2025 flagship update, extending the context window to 512K tokens. It pairs enhanced reasoning with full multimodal input — vision, audio, and video — plus tool use (function calling), prompt caching, and integrated web search, making it a fit for long-document and research-heavy workflows. Context: 512K tokens, output: 128K. Accessible via the OpenAI-compatible protocol.

Context Window

512K

Max Output Tokens

128K

Released

2025-12-11

Capabilities

VisionFunction CallingReasoningPrompt CachingWeb SearchAudio InputVideo Input

Available Providers

Azure

Supported Protocols

openai

Providers

Azureprovider.type: "azure_foundry"

-20%

Input Tokens

$1.4/M

$1.75/M

Output Tokens

$11.2/M

$14/M

Cache Read

$0.144/M

$0.18/M

Output Image

$25.6/M

$32/M

Web Search

$0.035/R

Protocols

openai/v1/chat/completions/v1/responses

Playground

Open in OfoxChat

Code Examples

from openai import OpenAI

client = OpenAI(
    base_url="https://api.ofox.run/v1",
    api_key="YOUR_OFOX_API_KEY",
)

response = client.chat.completions.create(
    model="openai/gpt-5.2",
    messages=[
        {"role": "user", "content": "Hello!"}
    ],
)

print(response.choices[0].message.content)

Benchmarks

LMArena ↗Evaluated as gpt-5.2

OpenAI: GPT-5.2 scores 1435 in the Overall category of the LMArena text leaderboard (style control), ranking #73 of 374 models based on 73,916 human preference votes (updated 2026-07-12).

Benchmark scores for gpt-5.2 on LMArena
Category	95% CI	Rank	Votes
Overall	1432–1439	#73 of 374	73,916
Hard Prompts	1455–1463	#68 of 374	46,164
Coding	1477–1488	#72 of 369	19,199
Math	1423–1442	#72 of 362	4,124
Creative Writing	1383–1396	#99 of 372	11,947
Instruction Following	1418–1428	#75 of 374	23,745
Chinese	1458–1480	#80 of 344	3,574

Source: LMArena · CC BY 4.0 · Updated 2026-07-12 · Methodology ↗ · Ranks compare models within each category of the LMArena text leaderboard (style control). Scores come from third-party human preference evaluations, not from OFOX.