GPT-5.2 API

openai/gpt-5-2
GPT-5.2 is OpenAI’s most advanced model series to date, engineered specifically for high-stakes knowledge work.
Context
400K tokens
Input
$2.275 / 1M tokens
Output
$18.2 / 1M tokens
Released
Dec 11, 2025

Overview

GPT-5.2 API Overview

GPT-5.2 represents OpenAI's latest advancement in large language models, engineered for deeper analytical work and superior handling of complex, real-world tasks. It excels at coding assistance, long-document summarization, precise analysis of uploaded files, step-by-step math and logic breakdowns, and structured support for planning and decision-making with enhanced clarity and actionable detail.

This model builds on prior iterations with refined reasoning chains and output polish, making it ideal for professional workflows requiring reliability and depth across technical and cognitive domains.

Technical Specifications

  • Architecture: Transformer-based generative LLM
  • Context Length: Up to 64K tokens (extended context)
  • Capabilities: Chat, reasoning, multimodal integration, code generation, tool usage
  • Training Data: Diverse web-scale corpora, scientific literature, dialogue, and code datasets with human feedback alignment (RLHF)
  • Inference Enhancements: Adaptive attention mechanisms and optimized transformer kernels for reduced latency and energy consumption
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Performance Benchmarks

  • Logical Reasoning: Superior stability and accuracy on multi-step reasoning tasks
  • Code Generation: High functional correctness across multiple programming languages
  • Multilingual Understanding: Supports 40+ languages with strong contextual retention
  • Extended Context Tasks: Maintains coherence and factual integrity on inputs exceeding 50K tokens
  • Few-shot Learning: 30% improvement in generalization compared to GPT-5.0

Quality Improvements

  • Maintains coherent reasoning across million-token contexts without drift.
  • Step-by-step breakdowns now include verifiable logic paths for math, code, and decisions.
  • Enhanced file understanding delivers context-aware summaries and Q&A with precise citations.
  • Balanced professional tone with actionable structure, minimizing vague or overly verbose outputs.
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API Pricing

  • Input: $2.275 / 1M
  • Output: $18.2 / 1M

New Features & Technical Upgrades

  • Adaptive Reasoning Mode: Silent multi-step cognitive pass before output reduces errors and contradictions
  • Extended Context Window (64K tokens): Enables long-form document processing, sustained dialogs, and data-driven reasoning
  • Multimodal Compatibility: Seamless integration with vision and speech modalities for richer input/output pipelines
  • Safe Output Layers: Refined RLHF ensures stronger guardrails against toxic or biased content
  • Efficiency Optimizations: 20% faster inference with 15% lower energy use versus prior versions

Practical Impact

These technical innovations empower GPT-5.2 to deliver high-precision AI assistance for enterprises, developers, educators, and researchers. Ideal for applications requiring reliable long-context understanding, coding tools, multilingual communication, and content creation workflows.

Code Sample

Comparison with Other Models

vs GPT-5.1: GPT-5.2 delivers dramatic gains in long-context accuracy (77% vs. 29.6% at 256K), coding (55.6% vs. 50.8% on SWE-Bench Pro), and tool reliability (98.7% vs. 95.6% on Tau2 Telecom). Hallucinations are 30% less frequent, and output quality is consistently more professional.

vs GPT-5: 20% faster with lower energy consumption; improved factual accuracy and fewer hallucinations on extended contexts. Superior handling of complex multi-turn dialogues and abstract reasoning tasks.

Uptime and performance

  • Uptime (24h): 67.0%
  • Uptime (7d): 95.0%
  • Availability (24h): 66.0%
  • Error rate (24h): 34.0%
  • End-to-end latency (24h median): 1.3s
  • Time to first token (24h median): 598ms
  • Throughput (24h median): 32.0 tok/s

Measured on the AI/ML API gateway across live traffic. Figures are medians unless stated. Last updated 2026-10-12.

Use cases

GPT-5.2 is documented as suited for code-heavy and multi-step agentic tasks, including complex reasoning and broad world knowledge. It is also described as useful for creating spreadsheets, building presentations, writing code, and handling complex, multi-step projects. For professional engineering work, it is presented as a model for debugging production code, implementing feature requests, refactoring large codebases, and shipping fixes end-to-end with less manual intervention. It is additionally described as well suited for analyzing long documents, such as reports, contracts, research papers, transcripts, and multi-file projects, with support for deep analysis, synthesis, and complex multi-source workflows.

How to use GPT-5.2 API

Install any OpenAI-compatible SDK, point it at api.aimlapi.com/v1, and set the model to openai/gpt-5-2.
import requests

r = requests.post(
    "https://api.aimlapi.com/v1/chat/completions",
    headers={"Authorization": "Bearer " + AIMLAPI_KEY},
    json={
      "model": "openai/gpt-5-2",
      "messages": [
        {
          "role": "user",
          "content": "Hello!"
        }
      ]
    },
)
print(r.json())
const r = await fetch("https://api.aimlapi.com/v1/chat/completions", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "openai/gpt-5-2",
    "messages": [
      {
        "role": "user",
        "content": "Hello!"
      }
    ]
  }),
});
console.log(await r.json());
curl -X POST https://api.aimlapi.com/v1/chat/completions \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"openai/gpt-5-2","messages":[{"role":"user","content":"Hello!"}]}'

OpenAI-compatible — swap the base URL and it works with your existing SDK.

GPT-5.2 API Pricing

TypePrice
Input
$2.275 / 1M tokens
Output
$18.2 / 1M tokens
Cached input
$0.2275 / 1M tokens

GPT-5.2 Benchmarks

BenchmarkScoreWhat it measuresSourceRetrieved
AIME 2025
100%
Competition mathematics (AIME), 2025SourceJuly 12, 2026
GPQA Diamond
92.4%
Google-proof graduate science questions (hardest subset)SourceJuly 12, 2026
SWE-bench Verified
80%
Resolving verified real GitHub issuesSourceJuly 12, 2026
Intelligence
30.4
Composite score across standardised reasoning, knowledge and problem-solving evaluations, measured independently by Artificial AnalysisSourceSeptember 12, 2026
Math
99
Composite score across standardised mathematics evaluations, measured independently by Artificial AnalysisSourceSeptember 12, 2026

GPT-5.2 vs other models

ModelInputOutputContextBest for
GPT-5.2
This page
$2.275 / 1M tokens
$18.2 / 1M tokens
400K tokens
Reasoning + agents
$6.5 / 1M tokens
$39 / 1M tokens
1M tokens
Reasoning + agents
$2.6 / 1M tokens
$13 / 1M tokens
1M tokens
Balanced coding + agents
$3.9 / 1M tokens
$19.5 / 1M tokens
1M tokens
Long-context, multimodal & agentic workflows
$1.95 / 1M tokens
$11.7 / 1M tokens
1M tokens
Reasoning + agents

Frequently asked questions

GPT-5.2 has a 400,000 tokens context window and can return up to 128,000 tokens.

GPT-5.2 takes image, text as input and returns text.

Use openai/gpt-5-2 as the model id. Requests go to https://api.aimlapi.com/v1/chat/completions.

GPT-5.2 is priced at input $2.275 / 1M tokens, output $18.2 / 1M tokens, cached input $0.2275 / 1M tokens.

Yes, GPT-5.2 can stream responses as they are generated.

Yes, GPT-5.2 accepts image input alongside text.

GPT-5.2 was built by OpenAI.

Yes, it supports function calling, parallel tool calls, and structured outputs.

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