GPT-5.1 vs OPT-175B

OpenAI vs Meta — benchmarks, pricing, and capabilities side by side.

•GPT-5.1 has a larger context window (400K)

	GPT-5.1	OPT-175B
Intelligence index	89	—
Developer	OpenAI	Meta
Type	LLM	LLM
Access	API only	Open weights
Context window	400,000 tokens	2,048 tokens
Input price	$1.25 / 1M	—
Output price	$10.00 / 1M	—
Speed	115 tok/s	—
Released	November 12, 2025	May 3, 2022
Parameters	—	175B
Input modalities	Text, Image	Text
Output modalities	Text	Text

GPT-5.1 details OPT-175B details