Perplexity: Sonar Reasoning Pro
Sonar Reasoning Pro is a reasoning model from Perplexity released on Jan 1, 2024. It reads text and images and writes text, with a 128K token context window and up to 4K tokens per reply.
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It costs $2 per million input tokens and $8 per million output tokens.
It supports structured JSON output.
6 providers serve it, including Eden AI, Helicone and Kilo Gateway.
- Modalities
- In / out price
- $2 / $8 per 1M
- Context
- 128K
- Max output
- 4K
- Released
- Jan 1, 2024
- Knowledge cutoff
- Sep 2025
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
Sonar Reasoning Pro pricing
USD, as listed on Oct 15, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.
| Input | $2 / 1M tokens | |
|---|---|---|
| Output | $8 / 1M tokens |
Sonar Reasoning Pro providers
6 providers serve it, including Eden AI, Helicone and Kilo Gateway. Each host sets its own price and limits, so the cheapest one is not always the one with the longest context.
| Provider | Input /M | Output /M | Cache read /M | Context | Max output |
|---|---|---|---|---|---|
| Perplexity First party | $2 | $8 | – | 128K | 4K |
| Eden AI | $2 | $8 | – | 128K | 4K |
| Helicone | $2 | $8 | – | 127K | 4K |
| Kilo Gateway | $2 | $8 | – | 128K | 115K |
| Opper | $2 | $8 | – | 128K | 4K |
| AnyAPI | n/a | n/a | – | 128K | 4K |
What Sonar Reasoning Pro costs per month
Pick a workload close to yours or type your own volumes.
Supported request parameters
What you can set when you call Sonar Reasoning Pro through an OpenAI compatible API.
- Structured outputs
structured_outputs - Reasoning
reasoning - Temperature
temperature
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Sonar Reasoning Pro questions
How much does the Sonar Reasoning Pro API cost?
$2 per million input tokens and $8 per million output tokens. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of Sonar Reasoning Pro?
128,000 tokens of input, and it can write up to 4,096 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.
Which providers serve Sonar Reasoning Pro?
6 providers serve it, including Eden AI, Helicone and Kilo Gateway. Prices differ by host, so the Providers table on this page lists each one with its input and output price.
Does Sonar Reasoning Pro support tool calling?
Not through the standard tools parameter. For an agent that calls your APIs, pick a model from the alternatives below that does.
Is Sonar Reasoning Pro open source?
No. Perplexity serves it through an API only, so you cannot download the weights or host it yourself.
When was Sonar Reasoning Pro released?
Jan 1, 2024, with training data up to Sep 2025.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 15, 2026. The summary is written from these facts.
Building on Sonar Reasoning Pro?
I test your real tasks on it and the two closest alternatives, then ship the agent on whichever wins on cost and accuracy.
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