gpt-5-nano vs DeepSeek-V4-Flash 0731

OpenAI gpt-5-nanoDeepSeek DeepSeek-V4-Flash 0731
VendorOpenAIDeepSeek
Context window400,0001,000,000
Max output128,000384,000
ReasoningYesYes
Tool callingYesYes
File inputYesYes
Inputtext, imagetext
Outputtexttext
Released2025-08-072026-07-30