Reasoning Chat
Sonar Deep Research is a research-focused model designed for multi-step retrieval, synthesis, and reasoning across complex topics. It autonomously searches, reads, and evaluates sources, refining its approach as it gathers...
What it's best for
Best for the hardest general work: long, nuanced documents, difficult reasoning and tasks where output quality matters more than price per token.
Pricing
Prices updated daily; last generated 2026-09-06.
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.
Sonar Deep Research is a reasoning model: it generates thinking tokens before its answer, and
those are billed at the output price even when they never appear in the reply. If
max_tokens cuts the think block off before it closes, the call can return HTTP
200 with an empty answer and still be charged for every token generated. Set
max_tokens high enough for the think block to finish.
Where your data is processed
Requests to Sonar Deep Research 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-deep-research.
Credentials come from your portal, with £25
of free credit on signup.
curl https://api.node.uk/api/v1/models/sonar-deep-research/v1/chat/completions \
-H "Authorization: Bearer $NODE_GATEWAY_TOKEN" \
-H "Content-Type: application/json" \
-d '{"model": "sonar-deep-research", "messages": [{"role": "user", "content": "Hello"}]}'from openai import OpenAI
client = OpenAI(
base_url="https://api.node.uk/api/v1/models/sonar-deep-research/v1",
api_key=NODE_GATEWAY_TOKEN,
)
reply = client.chat.completions.create(
model="sonar-deep-research",
messages=[{"role": "user", "content": "Hello"}],
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