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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