Is GPT OSS 120B or Claude Sonnet 4.5 (latest) cheaper?

GPT OSS 120B is cheaper on output tokens ($0.28 vs $15.00 per 1M).

Which has the larger context window, GPT OSS 120B or Claude Sonnet 4.5 (latest)?

Claude Sonnet 4.5 (latest) has the larger context window (200K tokens).

GPT OSS 120B vs Claude Sonnet 4.5 (latest)

GPT OSS 120B is cheaper on output tokens, while Claude Sonnet 4.5 (latest) offers a larger context window. Choose GPT OSS 120B or Claude Sonnet 4.5 (latest) based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT OSS 120B	Claude Sonnet 4.5 (latest)
Provider	Neon	Neon
Input / 1M tokens	$0.07	$3.00
Output / 1M tokens	$0.28	$15.00
Context window	131K	200K
Parameters	117B	—
Open weights	Yes	No
Released	Aug 2025	Sep 2025

GPT OSS 120B details →Claude Sonnet 4.5 (latest) details →

FAQ

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