DeepSeek V4 Pro vs GPT OSS 20B
Compare DeepSeek V4 Pro by DeepSeek against GPT OSS 20B by OpenAI, context windows of 1.0M vs 131K, tested across 53 shared challenges. Updated June 2026.
Which is better, DeepSeek V4 Pro or GPT OSS 20B?
DeepSeek V4 Pro and GPT OSS 20B are both competitive models. DeepSeek V4 Pro costs $1.74/M input tokens vs $0.02/M for GPT OSS 20B. Context windows: 1049K vs 131K tokens. Compare their real outputs side by side below.
Key Differences Between DeepSeek V4 Pro and GPT OSS 20B
DeepSeek V4 Pro is made by deepseek while GPT OSS 20B is from openai. DeepSeek V4 Pro has a 1049K token context window compared to GPT OSS 20B's 131K. On pricing, DeepSeek V4 Pro costs $1.74/M input tokens vs $0.02/M for GPT OSS 20B.
Per 1M tokens
GPT OSS 20B is cheaper on both — 87× input, 35× output
No community votes yet. On paper, DeepSeek V4 Pro has the edge — bigger model tier, newer, bigger context window.
GPT OSS 20B is 35x cheaper per token — worth considering if cost matters.
Style Comparison
GPT OSS 20B uses 2.9x more emoji
