DeepSeek V4 Flash 0731 vs GPT-5.6 Luna Pro: side-by-side summary

DeepSeek V4 Flash 0731 and GPT-5.6 Luna Pro are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

DeepSeek V4 Flash 0731, from DeepSeek, has a 1,310,720-token context window and is priced at $0.065/M tokens input, $0.14/M tokens output on OpenRouter.

GPT-5.6 Luna Pro, from OpenAI, has a 1,050,000-token context window and is priced at $0.20/M tokens input, $1.20/M tokens output on OpenRouter.

Context window

• DeepSeek V4 Flash 0731: 1,310,720 tokens
• GPT-5.6 Luna Pro: 1,050,000 tokens

Price

• DeepSeek V4 Flash 0731: $0.065/M tokens input, $0.14/M tokens output
• GPT-5.6 Luna Pro: $0.20/M tokens input, $1.20/M tokens output

Provided by

• DeepSeek V4 Flash 0731: DeepSeek
• GPT-5.6 Luna Pro: OpenAI

• DeepSeek V4 Flash 0731 model details, providers and pricing
• GPT-5.6 Luna Pro model details, providers and pricing