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ERNIE 4.5 21B A3B Thinking vs Sonar Reasoning Pro

Baidu vs Perplexity — benchmarks, pricing, and capabilities side by side.

  • ERNIE 4.5 21B A3B Thinking is cheaper ($0.07 vs $2.00 per 1M input)
  • ERNIE 4.5 21B A3B Thinking has a larger context window (131K)
ERNIE 4.5 21B A3B ThinkingSonar Reasoning Pro
Intelligence index95.7
DeveloperBaiduPerplexity
TypeLLMMultimodal
AccessOpen weightsAPI only
Context window131,072 tokens128,000 tokens
Input price$0.07 / 1M$2.00 / 1M
Output price$0.28 / 1M$8.00 / 1M
Speed
ReleasedOctober 9, 2025March 7, 2025
Parameters
Input modalitiesTextText, Image
Output modalitiesTextText