Is Claude Sonnet 3.5 v2 or GPT OSS 20B cheaper?

GPT OSS 20B is cheaper on output tokens ($0.30 vs $15.00 per 1M).

Which has the larger context window, Claude Sonnet 3.5 v2 or GPT OSS 20B?

Claude Sonnet 3.5 v2 has the larger context window (200K tokens).

Claude Sonnet 3.5 v2 vs GPT OSS 20B

GPT OSS 20B is cheaper on output tokens, while Claude Sonnet 3.5 v2 offers a larger context window. Choose Claude Sonnet 3.5 v2 or GPT OSS 20B based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Claude Sonnet 3.5 v2	GPT OSS 20B
Provider	Cloudflare AI Gateway	Cloudflare AI Gateway
Input / 1M tokens	$3.00	$0.20
Output / 1M tokens	$15.00	$0.30
Context window	200K	128K
Parameters	—	21B
Open weights	No	No
Released	Oct 2024	Aug 2025

Claude Sonnet 3.5 v2 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.