Model

GPT-5 Pro

CLOSED

OpenAI · GPT-5 family · released Aug 7, 2025

Top extended-reasoning tier of the GPT-5 family, launched same-day as GPT-5 for $200/mo ChatGPT Pro subscribers (Aug 7, 2025); API access (Responses API only) followed on Oct 6, 2025 at $15/$120 per M tokens, 400K context / 272K max output.

ReasoningCodingVisionFunction callingTool useAgentic

2349.9

Elo · rank #29

Parameters

Undisclosed

Active params

—

Context

400K tokens

Architecture

Unified reasoning system behind GPT-5's auto-router; dense transformer, exact size undisclosed; top extended-reasoning tier defaulting to maximum reasoning effort

License

Proprietary (OpenAI API Terms)

Languages

—

API price (in/out)

$15 / $120

Modalities

text · vision

Benchmark results

Bar shows position within the tracked field; marker = field best

AIMEMath100.0%#2

best: GPT-5.2 · 100.0%

ARC-AGI-1Reasoning70.2%#9

best: GPT-5.6 · 96.5%

ARC-AGI-2Reasoning18.3%#19

best: GPT-5.6 · 92.5%

FrontierMath (Tiers 1-3)Math55.8%#2

best: GPT-5.6 · 89.0%

FrontierMath (Tier 4)Math19.5%#7

best: GPT-5.6 · 83.0%

GPQA DiamondReasoning88.4%#33

best: GPT-5.6 · 94.6%

Humanity's Last ExamReasoning31.6%#43

best: Claude Sonnet 5 · 57.4%

Run it locally

Closed weights — available via API only. No local deployment.

Input / M tok

$15

Output / M tok

$120

GPT-5 family

Elo progression across releases

GPT-5Aug 20252082.7 GPT-5 miniAug 20251873.5 GPT-5 nanoAug 20251595.3 GPT-5 ProAug 20252349.9 GPT-5-CodexSep 20252103.4

Resources

DOCShttps://developers.openai.com/api/docs/models/gpt-5-pro APIAvailable via OpenAI API

API price $15/$120 · each benchmark row carries its own source badge (see methodology)