이 모델의 강점은 무엇인가요?

고급 추론 능력 탑재 긴 400K 컨텍스트 유지 OpenAI의 최신 설계

이 모델의 약점은 무엇인가요?

라이선스가 공개되지 않음 소스 코드 미공개 폐쇄적 사용 환경

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복잡한 논리적 추론 작업 긴 문서 분석 고급 문제 해결 자동화

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OpenAI독점

GPT-5.1 Pro

Name: GPT-5.1 Pro
Author: OpenAI

GPT-5.1 Pro는 OpenAI에서 개발한 기반 모델입니다. 추론 모델로 자리매김하고 있으며, 400K의 광범위한 컨텍스트 윈도우를 특징으로 합니다.

파라미터

Undisclosed

컨텍스트

400K

라이선스

Proprietary

출시일

2025-11-20

API 가격

이 모델의 API 가격 정보는 현재 공개되지 않았습니다

강점

・고급 추론 능력 탑재
・긴 400K 컨텍스트 유지
・OpenAI의 최신 설계

약점

・라이선스가 공개되지 않음
・소스 코드 미공개
・폐쇄적 사용 환경

활용 사례

・복잡한 논리적 추론 작업
・긴 문서 분석
・고급 문제 해결 자동화

심층 분석

Release Date

November 12, 2025

Context Window

410K tokens

Max Output

128K tokens

Input Price

$1.25 / 1M tokens

Output Price

$10.00 / 1M tokens

Modality

Multimodal (Text, Image, File input)

Architecture

Reasoning (chain-of-thought)

Knowledge Cutoff

September 2024

강점

・Designed for logic-heavy and multi-step tasks with strong reasoning capabilities
・Large 410K context window with 128K max output for comprehensive analysis
・Cost-effective reasoning model at $1.25/$10 per 1M tokens
・Supports configurable reasoning effort levels (medium, high)
・Strong foundation for the GPT-5.1 Codex family of coding models

약점

・Superseded by GPT-5.2 which offers 30% fewer errors at the same price
・Slower than GPT-5.1 Instant for interactive use cases
・Knowledge cutoff of September 2024 is older than GPT-5.2's August 2025
・Weaker agentic and tool-use capabilities compared to GPT-5.2
・No longer the recommended model — OpenAI suggests GPT-5.2 as the upgrade

경쟁사 비교

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-5.2 Thinking	1436	80.0%	92.4%	$1.75/$14 per 1M tokens
GPT-5	~1390	~68%	~85%	$1.25/$10 per 1M tokens

개요

GPT-5.1 (Thinking/Pro mode) is OpenAI's reasoning-focused model released November 12, 2025, designed for logic-heavy and multi-step tasks. With a 410K context window and configurable reasoning effort, it offered significant improvements over GPT-5 for complex analytical work. It has since been superseded by GPT-5.2, which provides 30% fewer errors at a similar price point.

벤치마크 및 성능

GPT-5.1 represents a significant step up from GPT-5 in reasoning capability with its chain-of-thought architecture. Specific benchmark scores for the Thinking variant are not individually published, but the GPT-5.1 family is designed for logic-heavy multi-step tasks. GPT-5.1 Codex (built on the same foundation) achieves SWE-bench Verified 73.7% and Terminal-Bench 2.0 52.8%. The model supports multiple reasoning effort levels for cost/quality tradeoffs.

상세 비교

GPT-5.1 Thinking has been largely superseded by GPT-5.2 Thinking, which offers 30% fewer response errors at a slightly higher price ($1.75/$14 vs $1.25/$10). Compared to Claude Sonnet 4.5 ($3/$15), it is significantly cheaper but may trail on some coding benchmarks. It offers better value than Gemini 3 Pro ($3.50/$10.50) for reasoning tasks. OpenAI recommends upgrading to GPT-5.2 for new projects.

커뮤니티 평가

GPT-5.1 was well-received upon release as a major improvement over GPT-5 for analytical tasks. Developers appreciated the configurable reasoning effort levels. However, with GPT-5.2's release just one month later, the community quickly migrated to the newer model. GPT-5.1 remains in use for cost-sensitive workloads where the 30% error reduction of GPT-5.2 doesn't justify the 40% price increase.

활용 사례

Suitable for: multi-step logical reasoning, code debugging and refactoring, mathematical problem solving, data consistency checks, document analysis, and structured proposal generation. Also works for: spreadsheet and presentation generation, strategic analysis, and research synthesis. For new projects, GPT-5.2 Thinking is recommended as the superior successor. GPT-5.1 is best retained for existing integrations where cost optimization is critical.