Is FLUX.2 Klein 4B or GPT-OSS-120B cheaper?

FLUX.2 Klein 4B and GPT-OSS-120B have comparable output pricing.

Which has the larger context window, FLUX.2 Klein 4B or GPT-OSS-120B?

GPT-OSS-120B has the larger context window (128K tokens).

FLUX.2 Klein 4B vs GPT-OSS-120B

Both have similar output pricing, while GPT-OSS-120B offers a larger context window. Choose FLUX.2 Klein 4B or GPT-OSS-120B based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	FLUX.2 Klein 4B	GPT-OSS-120B
Provider	Nvidia	Nvidia
Input / 1M tokens	$0.00	$0.00
Output / 1M tokens	$0.00	$0.00
Context window	41K	128K
Parameters	—	117B
Open weights	Yes	Yes
Released	Jan 2026	Aug 2025

FLUX.2 Klein 4B 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.