DeepSeek V3.1 vs Phi 4 Reasoning Plus: side-by-side summary

DeepSeek V3.1 and Phi 4 Reasoning Plus are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

DeepSeek V3.1, from DeepSeek, has a 163,840-token context window and is priced at $0.25/M tokens input, $0.95/M tokens output on OpenRouter.

Phi 4 Reasoning Plus, from Microsoft, has a 32,768-token context window and is priced by the provider serving it on OpenRouter.

Context window

• DeepSeek V3.1: 163,840 tokens
• Phi 4 Reasoning Plus: 32,768 tokens

Price

• DeepSeek V3.1: $0.25/M tokens input, $0.95/M tokens output
• Phi 4 Reasoning Plus: Pricing varies by provider

Provided by

• DeepSeek V3.1: DeepSeek
• Phi 4 Reasoning Plus: Microsoft

• DeepSeek V3.1 model details, providers and pricing
• Phi 4 Reasoning Plus model details, providers and pricing