Is Seed 1.8 (251228) or GPT OSS 120B cheaper?

GPT OSS 120B is cheaper on output tokens ($0.25 vs $2.00 per 1M).

Which has the larger context window, Seed 1.8 (251228) or GPT OSS 120B?

Seed 1.8 (251228) has the larger context window (256K tokens).

Seed 1.8 (251228) vs GPT OSS 120B

GPT OSS 120B is cheaper on output tokens, while Seed 1.8 (251228) offers a larger context window. Choose Seed 1.8 (251228) or GPT OSS 120B based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Seed 1.8 (251228)	GPT OSS 120B
Provider	LLM Gateway	LLM Gateway
Input / 1M tokens	$0.25	$0.05
Output / 1M tokens	$2.00	$0.25
Context window	256K	131K
Parameters	—	117B
Open weights	Yes	No
Released	Dec 2025	Aug 2025

Seed 1.8 (251228) 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.