Is Grok 4.20 or GPT OSS 120B cheaper?

GPT OSS 120B is cheaper on output tokens ($0.15 vs $2.50 per 1M).

Which has the larger context window, Grok 4.20 or GPT OSS 120B?

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

Grok 4.20 vs GPT OSS 120B

GPT OSS 120B is cheaper on output tokens, while Grok 4.20 offers a larger context window. Choose Grok 4.20 or GPT OSS 120B based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Grok 4.20	GPT OSS 120B
Provider	OpenRouter	OpenRouter
Input / 1M tokens	$1.25	$0.03
Output / 1M tokens	$2.50	$0.15
Context window	2M	131K
Parameters	500B	117B
Open weights	No	Yes
Released	Mar 2026	Aug 2025

Grok 4.20 details →GPT OSS 120B details →

FAQ

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