Is GPT OSS 20B or GPT-3.5 Turbo Instruct cheaper?

GPT OSS 20B is cheaper on output tokens ($0.20 vs $2.00 per 1M).

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

GPT OSS 20B has the larger context window (131K tokens).

GPT OSS 20B vs GPT-3.5 Turbo Instruct

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 Instruct 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 Instruct
Provider	Vercel AI Gateway	Vercel AI Gateway
Input / 1M tokens	$0.05	$1.50
Output / 1M tokens	$0.20	$2.00
Context window	131K	8K
Parameters	21B	20B
Open weights	Yes	No
Released	Aug 2025	Sep 2023

GPT OSS 20B details →GPT-3.5 Turbo Instruct details →

FAQ

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