GPT-5.6 Sol vs DeepSeek V4 Pro 0423: side-by-side summary

GPT-5.6 Sol and DeepSeek V4 Pro 0423 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 $2/M tokens input, $10/M tokens output on OpenRouter.

DeepSeek V4 Pro 0423, from DeepSeek, has a 1,048,576-token context window and is priced at $0.5262/M tokens input, $1.052/M tokens output on OpenRouter.

Context window

• GPT-5.6 Sol: 1,050,000 tokens
• DeepSeek V4 Pro 0423: 1,048,576 tokens

Price

• GPT-5.6 Sol: $2/M tokens input, $10/M tokens output
• DeepSeek V4 Pro 0423: $0.5262/M tokens input, $1.052/M tokens output

Provided by

• GPT-5.6 Sol: OpenAI
• DeepSeek V4 Pro 0423: DeepSeek

• GPT-5.6 Sol model details, providers and pricing
• DeepSeek V4 Pro 0423 model details, providers and pricing