Is GPT OSS 20B or GPT-3.5-turbo cheaper?

GPT OSS 20B is cheaper on output tokens ($0.30 vs $1.50 per 1M).

Which has the larger context window, GPT OSS 20B or GPT-3.5-turbo?

GPT OSS 20B has the larger context window (128K tokens).

GPT OSS 20B vs GPT-3.5-turbo

GPT OSS 20B is cheaper on output tokens, while GPT OSS 20B offers a larger context window. Choose GPT OSS 20B or GPT-3.5-turbo based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT OSS 20B	GPT-3.5-turbo
Provider	Cloudflare AI Gateway	Cloudflare AI Gateway
Input / 1M tokens	$0.20	$0.50
Output / 1M tokens	$0.30	$1.50
Context window	128K	16K
Parameters	21B	20B
Open weights	No	No
Released	Aug 2025	Mar 2023

GPT OSS 20B details →GPT-3.5-turbo details →

FAQ

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