What are the strengths of this model?

Long context understanding of 400K tokens Advanced dialogue capabilities Latest design by OpenAI

What are the weaknesses of this model?

Closed-source format License restrictions Internal structure is not public

What are the best use cases?

Large-scale document analysis Advanced AI chat implementation Long context processing

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OpenAIProprietary

OpenAI GPT-5.2

Name: OpenAI GPT-5.2
Price: 0.875 USD
Author: OpenAI

OpenAI GPT-5.2, a foundation model developed by OpenAI, is a chat-specialized model with advanced dialogue capabilities. It supports a maximum context window of up to 400K.

Parameters

Undisclosed

Context Window

400K

License

Proprietary

Release Date

2025-12-11

API Pricing

Input Price (per 1M tokens)

$0.875

Output Price (per 1M tokens)

Billing Mode: standard

Strengths

・Long context understanding of 400K tokens
・Advanced dialogue capabilities
・Latest design by OpenAI

Weaknesses

・Closed-source format
・License restrictions
・Internal structure is not public

Use Cases

・Large-scale document analysis
・Advanced AI chat implementation
・Long context processing

Deep Analysis

Release Date

December 11, 2025

Context Window

400K tokens

Max Output

128K tokens

Input Price

$1.75 / 1M tokens

Output Price

$14.00 / 1M tokens

Arena Elo (Text)

1436

39,304 votes

Arena Elo (Coding)

1486

9,063 votes

Speed

73 tok/s

Knowledge Cutoff

August 31, 2025

Strengths

・Strong benchmark performance: GPQA 92.4%, SWE-bench Verified 80.0%, ARC-AGI-1 86.2%
・Excellent multilingual capability (ranked #7 across all models on BenchLM)
・Strong knowledge and reasoning scores (Knowledge #6, Reasoning #12)
・Good balance of quality and cost at $1.75/$14 per 1M tokens
・256K context in Thinking mode for long-document processing with near-perfect retrieval accuracy

Weaknesses

・Agentic performance is relatively weak (ranked #29 on BenchLM agentic category)
・Higher latency than GPT-5.1 variants for interactive use cases
・Higher pricing than base GPT-5 ($1.75/$14 vs $1.25/$10)
・Struggles with FrontierMath Tier 4 (14.6%) and Toolathon (46.3%)
・Not as strong as GPT-5.2 Pro for enterprise-critical tasks

Competitor Comparison

Model	Arena	SWE	GPQA	Price
Claude Sonnet 4.5	~1420	~72%	~89%	$3/$15 per 1M tokens
Gemini 3 Pro	~1420	76.2%	~90%	$3.50/$10.50 per 1M tokens
GPT-5.1	~1400	~74%	~88%	$1.25/$10 per 1M tokens
GPT-5.2 Pro	~1450	~80%	92.4%	$10.50/$84 per 1M tokens

Overview

GPT-5.2 (Thinking mode) is OpenAI's flagship reasoning model released December 11, 2025, delivering strong performance across knowledge work, coding, and long-context understanding. With Arena Elo of 1436 (1486 for coding), SWE-bench Verified at 80%, and GPQA at 92.4%, it represents the sweet spot for most professional developers. The GPT-5.2 family introduced three tiers: Instant, Thinking, and Pro.

Benchmarks & Performance

GPT-5.2 achieves strong benchmark results: GPQA Diamond 92.4% (graduate-level science reasoning), SWE-bench Verified 80.0%, ARC-AGI-1 86.2%, CharXiv Reasoning 88.7%, SWE-bench Pro 55.6%, ARC-AGI-2 52.9%, FrontierMath Tier 1-3 40.3%, and Toolathon 46.3%. On Chatbot Arena, it scores 1436 Elo overall and 1486 in coding. It produces 30% fewer response errors than GPT-5.1 Thinking and achieves near-perfect accuracy on 256K token document retrieval.

Detailed Comparison

GPT-5.2 Thinking offers significantly better reasoning than GPT-5.1 at the same price point ($1.75/$14), with 30% fewer errors. Compared to Claude Sonnet 4.5, it has higher Arena Elo (1436 vs ~1420) and better SWE-bench scores (80% vs ~72%). It trails GPT-5.2 Pro ($10.50/$84) in accuracy for enterprise-critical tasks but offers much better cost efficiency. Gemini 3 Pro is competitive on SWE-bench (76.2%) but at a higher price point.

Community Feedback

GPT-5.2 Thinking is widely regarded as the best value-for-money model in the OpenAI lineup for professional developers. The 98.7% tool-use accuracy has made it popular for AI agent pipelines. Developers praise its long-document handling capabilities and reduced hallucination rate. Some users note that agentic tasks still lag behind Claude's capabilities. The consensus is that GPT-5.2 Thinking 'hits the sweet spot' for most businesses.

Use Cases

Recommended for: multi-step reasoning and coding tasks, AI agent/SaaS pipelines (due to near-perfect tool-use accuracy), long-document analysis (up to 256K tokens in Thinking mode), professional knowledge work, structured content creation, and policy/billing accuracy in customer support. Not ideal for: ultra-low-latency applications (use GPT-5.2 Instant), maximum accuracy enterprise work (use GPT-5.2 Pro), or budget-conscious high-volume tasks (use GPT-5 or GPT-5 mini).

Latest News

Released December 11, 2025 as the latest model family in the GPT-5 series. The GPT-5.2 System Card was published alongside the release. GPT-5.2 Chat (Instant) was later made available on February 10, 2026. GPT-5.4 (March 2026) has since superseded it as the latest generation, but GPT-5.2 remains widely used.

Sources

Analysis generated: 2026-05-24