Question 1

What does this Sonar vs Sonar Reasoning Pro comparison cover?

Accepted Answer

It brings together documented inputs and outputs, token limits, deployment terms and available pricing. When both models have source-linked, verified results on a shared benchmark, those results are shown with their individual sources. The comparison is a starting point for evaluating your own workload.

Question 2

Which is cheaper: Sonar or Sonar Reasoning Pro?

Accepted Answer

Sonar lists $1.00 input and $1.00 output per 1M tokens. Sonar Reasoning Pro lists $2.00 input and $8.00 output. The cheaper workload depends on the mix of input and output. Long-context tiers, caching, batch processing and retries can change the bill.

Question 3

Which has the larger context window: Sonar or Sonar Reasoning Pro?

Accepted Answer

Both records list a 128K-token context window. An equal limit does not imply equal recall, instruction following, or long-context quality.

Question 4

Which is faster: Sonar or Sonar Reasoning Pro?

Accepted Answer

There is no matched speed measurement for both models with the same source, host, region and date. Test the same prompts at your expected concurrency and measure time to the first useful response as well as complete task time.

Question 5

What input and output types do Sonar and Sonar Reasoning Pro support?

Accepted Answer

Sonar records text input and text output. Sonar Reasoning Pro records text, image input and text output. “Not documented” means the current source record is incomplete; it does not prove that a modality is unsupported.

Question 6

Should I choose Sonar or Sonar Reasoning Pro?

Accepted Answer

Consider Sonar if you need a lower listed input rate or a lower listed output rate. Test both on the same representative examples and judge the output against your acceptance criteria. Include tool failures, retries and the time to a completed task.

Specification	Sonar	Sonar Reasoning Pro
Provider	Perplexity	Perplexity
Listed pricing route	Perplexity	Perplexity
Model family	sonar	sonar-reasoning
Accepted inputs	text	text, image
Produced outputs	text	text
Context window	128K	128K
Max output	4.1K	4.1K
Input price / 1M	$1.00Lower	$2.00
Output price / 1M	$1.00Lower	$8.00
Reasoning mode	Not documented	Documented
Tool calling	Not documented	Not documented
Image input	Not documented	Documented
Audio input	Not documented	Not documented
Structured output	Not documented	Not documented
License	Proprietary	Proprietary

Sonar vs Sonar Reasoning Pro

Sonar

Sonar Reasoning Pro

Key differences

Pricing, limits and capabilities

Which model should you choose?

Documentation and model profiles

Questions people ask

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