GPT-5.1

Deprecated

openai/gpt-5.1

Sharper GPT-5 generation for coding, product work, and tool-assisted tasks

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Context window: 400K
Input: Image · Text
Output: Text
Released: 2025-11-13

Max output: 128K
Knowledge cutoff: 2024-09-30
Weights: Closed
Capabilities: Attachments, Reasoning, Structured, Tool call

Pricing

$1.25

USD / 1,000,000 token

Cache read

$0.125

USD / 1,000,000 token

OUT

$10.00

USD / 1,000,000 token

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Batch processing

Performance


Humanity’s Last Exam（Artificial Analysis）	Reasoning	Artificial Analysis	—
BullshitBench v2	Knowledge	BullshitBench	—
GDPval-AA	Professional	Artificial Analysis	—
AA-Omniscience（Artificial Analysis）	Knowledge	Artificial Analysis	—
CritPt（Artificial Analysis）	Reasoning	Artificial Analysis	—
IFBench（Artificial Analysis）	Knowledge	Artificial Analysis	—
Chess Puzzles	Reasoning	Epoch AI	—
SimpleQA Verified	Knowledge	Epoch AI	—

Providers

							Cache write
OpenAI	gpt-5.1	Openai responses	global				-
OpenRouter	openai/gpt-5.1	Openai chat	global				-

ModelRegistry · Catalog updated 2026-11-05