DeepSeek V3.1 Base vs Cypher Alpha: side-by-side summary

DeepSeek V3.1 Base and Cypher Alpha are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

DeepSeek V3.1 Base, from DeepSeek, has a 163,840-token context window and is priced by the provider serving it on OpenRouter.

Cypher Alpha, from OpenRouter, has a 1,000,000-token context window and is priced by the provider serving it on OpenRouter.

Context window

• DeepSeek V3.1 Base: 163,840 tokens
• Cypher Alpha: 1,000,000 tokens

Price

• DeepSeek V3.1 Base: Pricing varies by provider
• Cypher Alpha: Pricing varies by provider

Provided by

• DeepSeek V3.1 Base: DeepSeek
• Cypher Alpha: OpenRouter

• DeepSeek V3.1 Base model details, providers and pricing
• Cypher Alpha model details, providers and pricing