DeepSeek V4 Flash vs GPT-5.5
Compare DeepSeek V4 Flash by DeepSeek against GPT-5.5 by OpenAI, context windows of 1.0M vs 1.1M, tested across 54 shared challenges. Updated April 2026.
Which is better, DeepSeek V4 Flash or GPT-5.5?
DeepSeek V4 Flash and GPT-5.5 are both competitive models. DeepSeek V4 Flash costs $0.14/M input tokens vs $5/M for GPT-5.5. Context windows: 1049K vs 1050K tokens. Compare their real outputs side by side below.
Key Differences Between DeepSeek V4 Flash and GPT-5.5
DeepSeek V4 Flash is made by deepseek while GPT-5.5 is from openai. DeepSeek V4 Flash has a 1049K token context window compared to GPT-5.5's 1050K. On pricing, DeepSeek V4 Flash costs $0.14/M input tokens vs $5/M for GPT-5.5.
Per 1M tokens
DeepSeek V4 Flash is cheaper on both — 36× input, 107× output
No community votes yet. On paper, GPT-5.5 has the edge — bigger model tier.
DeepSeek V4 Flash is 107x cheaper per token — worth considering if cost matters.
Style Comparison
DeepSeek V4 Flash uses 5.4x more transitions
