GPT-5.1 vs RoBERTa

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

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

	GPT-5.1	RoBERTa
Intelligence index	89	—
Developer	OpenAI	Meta
Type	LLM	LLM
Access	API only	Open weights
Context window	400,000 tokens	512 tokens
Input price	$1.25 / 1M	—
Output price	$10.00 / 1M	—
Speed	115 tok/s	—
Released	November 12, 2025	July 26, 2019
Parameters	—	355M
Input modalities	Text, Image	Text
Output modalities	Text	Text

GPT-5.1 details RoBERTa details