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  1. Home
  2. /
  3. Compare

Sonar Pro Search vs Step 3.5 Flash

Compare Sonar Pro Search from Perplexity and Step 3.5 Flash from stepfun on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.

Favicon for perplexity
Sonar Pro Search
Favicon for stepfun
Step 3.5 Flash
Favicon for perplexity
Sonar Pro Search
Favicon for stepfun
Step 3.5 Flash

Overview

Sonar Pro Search
Author
Perplexity
Step 3.5 Flash
Author
stepfun
Sonar Pro Search
Context length
200Ktokens
Step 3.5 Flash
Context length
262Ktokens
Sonar Pro Search
Reasoning
Step 3.5 Flash
Reasoning
Sonar Pro Search
Input modalities
Step 3.5 Flash
Input modalities
Sonar Pro Search
Output modalities
Step 3.5 Flash
Output modalities

Sonar Pro Search vs Step 3.5 Flash: side-by-side summary

Sonar Pro Search and Step 3.5 Flash are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Sonar Pro Search, from Perplexity, has a 200,000-token context window and is priced at $3/M tokens input, $15/M tokens output on OpenRouter.

Step 3.5 Flash, from stepfun, has a 262,144-token context window and is priced at $0.10/M tokens input, $0.30/M tokens output on OpenRouter.

Context window
  • Sonar Pro Search: 200,000 tokens
  • Step 3.5 Flash: 262,144 tokens
Price
  • Sonar Pro Search: $3/M tokens input, $15/M tokens output
  • Step 3.5 Flash: $0.10/M tokens input, $0.30/M tokens output
Provided by
  • Sonar Pro Search: Perplexity
  • Step 3.5 Flash: stepfun
  • model details, providers and pricing
Sonar Pro Search
model details, providers and pricing
Step 3.5 Flash