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

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

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

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

GPT-3.5-turbo vs GPT OSS 20B

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

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

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

FAQ

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