sonar-reasoning-pro:free
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...
Capabilities
Modalities
Quick stats
Performance
Supported parameters
| Parameter | Always | Default |
|---|---|---|
| frequency_penalty | - | |
| include_reasoning | - | |
| max_tokens | - | |
| presence_penalty | - | |
| reasoning | - | |
| temperature | - | |
| top_k | - | |
| top_p | - | |
| web_search_options | - |
Pricing
| Input price | $0.00 · 1M tokens |
| Output price | $0.00 · 1M tokens |
| Context window | 128K tokens |
| Compatible endpoints | openai |
| Vendor | Perplexity |
Call sonar-reasoning-pro:free from your code
Point any OpenAI-compatible SDK at UnoRouter and request the model by name. Replace YOUR_API_KEY with a real key from your dashboard.
curl https://api.unorouter.com/v1/chat/completions \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "sonar-reasoning-pro:free",
"messages": [{"role": "user", "content": "Hello!"}]
}'Frequently asked questions
How much does sonar-reasoning-pro:free cost per 1M tokens?
Input is priced at $0.00 per 1M tokens, output at $0.00 per 1M tokens. Billing is per token, no rounding to batch sizes.
How do I access sonar-reasoning-pro:free via API?
Send requests to the UnoRouter /v1/chat/completions endpoint with model=sonar-reasoning-pro:free. Any OpenAI-compatible client library works. Authentication uses a standard Bearer token.
What is the context window of sonar-reasoning-pro:free?
sonar-reasoning-pro:free supports a context window of 128K tokens, shared between your prompt and the model's response.
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Try sonar-reasoning-pro:free now
Create an API key and start making requests in under a minute.