Sonar Reasoning Pro
Sonar Reasoning Pro is worth evaluating for rag, long context, and classification when its provider route and context window match the workload.
Use it for
- Teams evaluating rag, long context, and classification
- Workloads that can use a 128k context window
- Buyers comparing 3 tracked provider routes
Do not use it for
- Vision or document-understanding workloads
- Family
- Sonar
- Released
- 2025-03-01
- Context
- 128k
- Openness
- Proprietary
- License
- ProprietaryCommercial use: conditional
- Weights
- Not released
- Code
- Unknown
Developing AI for complex problem-solving.
Cheapest of 3 routes · OpenRouter
About
Perplexity's Chain-of-Thought reasoning search model. Replaced sonar-reasoning (deprecated December 2025). Request fees: $6-$14/1K requests (Low/Medium/High).
Sonar Reasoning Pro is a proprietary model in the Sonar family. The structured metadata tracks a 128k-token context window and structured outputs. This page tracks provider routes through OpenRouter, Perplexity Labs, and Vercel AI Gateway, with the cheapest tracked route listed at $2 input and $8 output per 1M tokens. No headline benchmark score is tracked for Sonar Reasoning Pro yet.
Top use-case fit
RAG
Included by capability and metadata signals in the decision map.
Long context
Included by capability and metadata signals in the decision map.
Classification
Included by capability and metadata signals in the decision map.
Provider price ladder
Compare all 3Compare API pricing across 3 providers for input and output tokens, batch, and cached reads when available.
| Provider | Input / 1M | Output / 1M | Route |
|---|---|---|---|
| OpenRouter | $2.00 | $8.00 | Serverless |
| Perplexity Labs | $2.00 | $8.00 | Serverless |
| Vercel AI Gateway | - | - | ServerlessPartial |
Capabilities
Benchmark peer barsfor RAG
No task-mapped benchmark peers are available for this model yet.
Migration checks
No linked migration route is available for this model yet.
Frequently asked questions
What is the context window of Sonar Reasoning Pro?
Sonar Reasoning Pro has a context window of 128k tokens.
How much does Sonar Reasoning Pro cost?
Sonar Reasoning Pro is available at $2/1M input tokens through OpenRouter.
When was Sonar Reasoning Pro released?
Sonar Reasoning Pro was released on 2025-03-01.
Which providers offer Sonar Reasoning Pro?
Sonar Reasoning Pro is available from 3 providers: OpenRouter, Perplexity Labs, Vercel AI Gateway.
Developing AI for complex problem-solving.
Cheapest of 3 routes · OpenRouter