Is OpenAI: GPT-5.1 Chat or DeepSeek: R1 cheaper?

DeepSeek: R1 is cheaper on output tokens ($2.50 vs $10.00 per 1M).

Which has the larger context window, OpenAI: GPT-5.1 Chat or DeepSeek: R1?

OpenAI: GPT-5.1 Chat has the larger context window (128K tokens).

OpenAI: GPT-5.1 Chat vs DeepSeek: R1

DeepSeek: R1 is cheaper on output tokens, while OpenAI: GPT-5.1 Chat offers a larger context window. Choose OpenAI: GPT-5.1 Chat or DeepSeek: R1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	OpenAI: GPT-5.1 Chat	DeepSeek: R1
Provider	Kilo Gateway	Kilo Gateway
Input / 1M tokens	$1.25	$0.70
Output / 1M tokens	$10.00	$2.50
Context window	128K	64K
Parameters	—	671B
Open weights	No	Yes
Released	Nov 2025	Jan 2025

OpenAI: GPT-5.1 Chat details →DeepSeek: R1 details →

FAQ

Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.