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High Reasoning

Sonar Reasoning Pro

Sonar Reasoning Pro is a high-performance AI model excelling in complex, multi-step reasoning with advanced Chain-of-Thought analysis, real-time web search, and citation-backed accuracy for research, strategic decisions, and deep analytical tasks. With a 128K context window and enterprise-grade speed up to 1,200 tokens per second, it delivers transparent, verifiable insights that outperform standard models.

128k Context
High Intelligence
Live Web Knowledge

Available for Chat, Vision, and File Uploads.

Performance Benchmarks

AIME
79.0%
MATH-500
95.7%
AAII
24.6%

How do you want to interact?

Start a Conversation

Ask anything.
Have a natural conversation, brainstorm ideas, draft emails, or ask for advice.

Start Chatting

Use a Persona

Specialized Experts.
Instruct the AI to act as a Coding Tutor, Marketing Expert, or Travel Guide.

Pick a Persona

Why use Sonar Reasoning Pro?

Real-time Web Search

Combines live web search with advanced reasoning and double citations for accurate, reliable responses to complex queries

Advanced Chain-of-Thought Reasoning

Enhanced multi-step CoT reasoning powered by DeepSeek-R1 for superior step-by-step inference, analysis, and problem-solving

Large Context Window

Supports 128K-200K token context for handling lengthy documents, multi-step queries, and extended conversations

Capability Examples

Complex Multi-Step Reasoning
Analyze the feasibility of fusion energy becoming a mainstream power source by 2040, including technical, economic, and regulatory hurdles.<think>Step 1: Current fusion progress - ITER delayed to 2035, private firms like Commonwealth Fusion targeting 2028 demos. Step 2: Scalability challenges - net energy gain rare, materials degrade under neutron flux. Step 3: Economics - $20-30B per plant, LCOE 2x solar today. Step 4: Regulations - NRC approvals slow. Conclusion: Unlikely by 2040, possible post-2050.</think>{"feasibility": "low", "timeline": "post-2040", "key_barriers": ["tech_maturity", "cost", "regulation"]}
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Advanced Research Synthesis
Compare investment risks of quantum computing stocks vs. biotech ETFs, factoring market trends and volatility.<think>Step 1: Quantum stocks (e.g., IONQ) - high beta 2.5, 80% drawdowns, nascent tech. Step 2: Biotech ETFs (e.g., XBI) - beta 1.4, regulatory approvals drive 20-50% swings. Step 3: Trends - quantum funding up 30% YoY, biotech M&A steady. Step 4: Risk - quantum higher volatility, longer horizon. Recommendation: Diversify with 70% biotech.</think>{"quantum_risk": "high_volatility_long_term", "biotech_risk": "regulatory_event_driven", "allocation": "70% biotech"}
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How to use

1
Go to Chat

Navigate to the "AI Chat" page.

2
Select Model

Ensure Sonar Reasoning Pro is selected.

3
Type Prompt

Ask a question or paste code.

4
Interact

Refine the answer by replying to the AI.

Compare LLMs Side-by-Side

Is Sonar Reasoning Pro better than Claude 3.5 or Gemini? Test same prompts simultaneously in the Chat Playground.

Open Chat Playground

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