Reasoning Vision Reasoning
Note: Sonar Pro pricing includes Perplexity search pricing. ai/guides/pricing#detailed-pricing-breakdown-for-sonar-reasoning-pro-and-sonar-pro) Sonar Reasoning Pro is a premier reasoning model powered by DeepSeek R1 with Chain of Thought (CoT). Designed for...
What it's best for
Best for multi-step problems where the model benefits from working through its chain of thought: maths, analysis, planning and agentic loops. Reasoning models produce (and bill for) more output tokens than plain chat models, so use them where the extra thinking pays for itself.
Pricing
Prices updated daily — last generated 2026-07-08.
Billing is metered per request in GBP on the same monthly invoice as your apps — no subscription, no minimum. We list every model once, at the cheapest route we can serve it on; if we have to fail over to a more expensive route, we absorb the difference and your price does not change.
Where your data is processed
Requests to Sonar Reasoning Pro are routed to a vetted partner provider and processed on that provider's infrastructure — they leave our infrastructure, and the UK-residency guarantee that applies to our UK-hosted models does not apply here. We hold the provider credentials server-side and route on cost and availability. If you need prompts that never leave our own infrastructure, use one of our UK-hosted models.
Call it in two minutes
The gateway is OpenAI-compatible: point your SDK or HTTP client at
api.node.uk and use the model id sonar-reasoning-pro.
Credentials come from your portal, with £15
of free credit on signup.
curl https://api.node.uk/api/v1/models/sonar-reasoning-pro/v1/chat/completions \
-H "Authorization: Bearer $NODE_GATEWAY_TOKEN" \
-H "Content-Type: application/json" \
-d '{"model": "sonar-reasoning-pro", "messages": [{"role": "user", "content": "Hello"}]}'from openai import OpenAI
client = OpenAI(
base_url="https://api.node.uk/api/v1/models/sonar-reasoning-pro/v1",
api_key=NODE_GATEWAY_TOKEN,
)
reply = client.chat.completions.create(
model="sonar-reasoning-pro",
messages=[{"role": "user", "content": "Hello"}],
)Related models
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