Is Claude Sonnet 4.5 or GPT OSS 120B cheaper?

GPT OSS 120B is cheaper on output tokens ($0.25 vs $15.00 per 1M).

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

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

Claude Sonnet 4.5 vs GPT OSS 120B

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

Spec	Claude Sonnet 4.5	GPT OSS 120B
Provider	LLM Gateway	LLM Gateway
Input / 1M tokens	$3.00	$0.05
Output / 1M tokens	$15.00	$0.25
Context window	200K	131K
Parameters	—	117B
Open weights	No	No
Released	Sep 2025	Aug 2025

Claude Sonnet 4.5 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.