GPT-5.6 Sol vs DeepSeek V4 Pro: side-by-side summary

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

GPT-5.6 Sol, from OpenAI, has a 1,050,000-token context window and is priced at $5/M tokens input, $30/M tokens output on OpenRouter.

DeepSeek V4 Pro, from DeepSeek, has a 1,048,576-token context window and is priced at $0.435/M tokens input, $0.87/M tokens output on OpenRouter.

Context window

• GPT-5.6 Sol: 1,050,000 tokens
• DeepSeek V4 Pro: 1,048,576 tokens

Price

• GPT-5.6 Sol: $5/M tokens input, $30/M tokens output
• DeepSeek V4 Pro: $0.435/M tokens input, $0.87/M tokens output

Provided by

• GPT-5.6 Sol: OpenAI
• DeepSeek V4 Pro: DeepSeek

• GPT-5.6 Sol model details, providers and pricing
• DeepSeek V4 Pro model details, providers and pricing