ERNIE 4.5 21B A3B vs Phi 4 Reasoning: side-by-side summary

ERNIE 4.5 21B A3B and Phi 4 Reasoning are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

ERNIE 4.5 21B A3B, from baidu, has a 131,072-token context window and is priced by the provider serving it on OpenRouter.

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

Context window

• ERNIE 4.5 21B A3B: 131,072 tokens
• Phi 4 Reasoning: 32,768 tokens

Price

• ERNIE 4.5 21B A3B: Pricing varies by provider
• Phi 4 Reasoning: Pricing varies by provider

Provided by

• ERNIE 4.5 21B A3B: baidu
• Phi 4 Reasoning: Microsoft

• ERNIE 4.5 21B A3B model details, providers and pricing
• Phi 4 Reasoning model details, providers and pricing