Is GPT OSS 120B or Claude Haiku 4.5 cheaper?

GPT OSS 120B is cheaper on output tokens ($0.36 vs $5.00 per 1M).

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

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

GPT OSS 120B vs Claude Haiku 4.5

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

Spec	GPT OSS 120B	Claude Haiku 4.5
Provider	Vertex	Vertex
Input / 1M tokens	$0.09	$1.00
Output / 1M tokens	$0.36	$5.00
Context window	131K	200K
Parameters	117B	—
Open weights	Yes	No
Released	Aug 2025	Oct 2025

GPT OSS 120B details →Claude Haiku 4.5 details →

FAQ

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