Question 1

What is Sonar Reasoning Pro?

Accepted Answer

Sonar Reasoning Pro is a model from Perplexity, released on Feb 6, 2025. Note: Sonar Pro pricing includes Perplexity search pricing. See details here Sonar Reasoning Pro is a premier reasoning model powered by DeepSeek R1 with Chain of Thought (CoT). Designed for advanced use cases, it supports in-depth, multi-step queries with a larger context window and can surface more citations per search, enabling more comprehensive and extensible responses.

Question 2

How much does Sonar Reasoning Pro cost?

Accepted Answer

On the Respan gateway, input starts at $2.00 per 1M tokens on OpenRouter, and output starts at $8.00 per 1M tokens on OpenRouter, after gateway discounts.

Question 3

Which providers serve Sonar Reasoning Pro on Respan?

Accepted Answer

Sonar Reasoning Pro is served by OpenRouter.

Question 4

What is Sonar Reasoning Pro's context window?

Accepted Answer

Sonar Reasoning Pro accepts up to 128K tokens of context.

Question 5

How do I use Sonar Reasoning Pro with the Respan gateway?

Accepted Answer

Point any OpenAI-compatible SDK at https://api.respan.ai/api/ with your Respan API key and set the model to "sonar-reasoning-pro". To set it up with a coding agent, copy the agent setup prompt at the top of this page.

Question 6

How fast is Sonar Reasoning Pro?

Accepted Answer

Over the last 30 days of requests through the Respan gateway, the fastest provider was OpenRouter at 3 tokens per second, and the lowest response latency was 2.0 seconds on OpenRouter. Speed varies with request size and provider.

Sonar Reasoning Pro

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