Is GPT OSS 20B or DeepSeek V4 Flash cheaper?

DeepSeek V4 Flash is cheaper on output tokens ($0.28 vs $0.30 per 1M).

Which has the larger context window, GPT OSS 20B or DeepSeek V4 Flash?

DeepSeek V4 Flash has the larger context window (1M tokens).

GPT OSS 20B vs DeepSeek V4 Flash

DeepSeek V4 Flash is cheaper on output tokens, while DeepSeek V4 Flash offers a larger context window. Choose GPT OSS 20B or DeepSeek V4 Flash based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT OSS 20B	DeepSeek V4 Flash
Provider	Fireworks AI	Fireworks AI
Input / 1M tokens	$0.07	$0.14
Output / 1M tokens	$0.30	$0.28
Context window	131K	1M
Parameters	21B	284B
Open weights	Yes	Yes
Released	Aug 2025	Apr 2026

GPT OSS 20B details →DeepSeek V4 Flash details →

FAQ

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