Is OpenAI GPT OSS 120B or Claude Sonnet 4.5 cheaper?

OpenAI GPT OSS 120B is cheaper on output tokens ($0.30 vs $18.75 per 1M).

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

Claude Sonnet 4.5 has the larger context window (198K tokens).

OpenAI GPT OSS 120B vs Claude Sonnet 4.5

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

Spec	OpenAI GPT OSS 120B	Claude Sonnet 4.5
Provider	Venice AI	Venice AI
Input / 1M tokens	$0.07	$3.75
Output / 1M tokens	$0.30	$18.75
Context window	128K	198K
Parameters	117B	—
Open weights	Yes	No
Released	Nov 2025	Jan 2025

OpenAI GPT OSS 120B details →Claude Sonnet 4.5 details →

FAQ

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