Is xAI: Grok 4.20 or OpenAI: gpt-oss-120b cheaper?

OpenAI: gpt-oss-120b is cheaper on output tokens ($0.19 vs $6.00 per 1M).

Which has the larger context window, xAI: Grok 4.20 or OpenAI: gpt-oss-120b?

xAI: Grok 4.20 has the larger context window (2M tokens).

xAI: Grok 4.20 vs OpenAI: gpt-oss-120b

OpenAI: gpt-oss-120b is cheaper on output tokens, while xAI: Grok 4.20 offers a larger context window. Choose xAI: Grok 4.20 or OpenAI: gpt-oss-120b based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	xAI: Grok 4.20	OpenAI: gpt-oss-120b
Provider	Kilo Gateway	Kilo Gateway
Input / 1M tokens	$2.00	$0.04
Output / 1M tokens	$6.00	$0.19
Context window	2M	131K
Parameters	500B	117B
Open weights	No	Yes
Released	Mar 2026	Aug 2025

xAI: Grok 4.20 details →OpenAI: gpt-oss-120b details →

FAQ

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