Claude Sonnet 4.6 vs Sonar Reasoning Pro (Comparative Analysis)
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Comparative Analysis: Claude Sonnet 4.6 vs. Sonar Reasoning Pro
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Overview
Sonar Reasoning Pro was released 11 months before Claude Sonnet 4.6.
 Claude Sonnet 4.6 |  Sonar Reasoning Pro | |
|---|---|---|
Model Provider The organization behind this AI's development | Anthropic | Perplexity |
Input Context Window Maximum input tokens this model can process at once | 1M tokens | 128K tokens |
Output Token Limit Maximum output tokens this model can generate at once | 128K tokens | Not specified tokens |
Release Date When this model first became publicly available | February 17, 2026 5 months ago February 17th, 2026 | March 7, 2025 1 year ago March 7th, 2025 |
Capabilities & Features
Compare supported features, modalities, and advanced capabilities
Claude Sonnet 4.6 | Sonar Reasoning Pro | |
|---|---|---|
Input Types Supported input formats | 📝Text🖼️Image📁File | 📝Text🖼️Image |
Reasoning Controls Defaults and configurable reasoning effort | OptionalEffort: Max, High, Medium, LowDefault: Medium | Optional |
Output Types Supported output formats | 📝Text | 📝Text |
Tokenizer Text encoding system | Claude | Other |
Key Features Advanced capabilities | ✓Function Calling✓Structured Output✓Reasoning Mode✓Content Moderation | Function CallingStructured Output✓Reasoning ModeContent Moderation |
Pricing
Claude Sonnet 4.6 is roughly 1.5x more expensive compared to Sonar Reasoning Pro for input tokens and roughly 1.9x more expensive for output tokens.
| Claude Sonnet 4.6 | Sonar Reasoning Pro | |
|---|---|---|
Input Token Cost Cost per million input tokens | $3.00 per million tokens | $2.00 per million tokens |
Output Token Cost Cost per million output tokens | $15.00 per million tokens | $8.00 per million tokens |
Web Search Cost Additional cost for each web search operation | $0.01 per search | $0.005 per search |
Cache Read Cost Cost to reuse cached input tokens | $0.30 per million tokens | Not specified |
Cache Write Cost Cost to write input tokens to the cache | $3.75 per million tokens | Not specified |
1-Hour Cache Write Cost Cost to cache input tokens for one hour | $6.00 per million tokens | Not specified |
Benchmarks
Compare relevant benchmarks between Claude Sonnet 4.6 and Sonar Reasoning Pro.
| Claude Sonnet 4.6 | Sonar Reasoning Pro | |
|---|---|---|
Intelligence Index Overall model quality across independent evaluations | 47.2 (Artificial Analysis index; higher is better) | Benchmark not available. |
Coding Index Programming performance across independent evaluations | 63 (Artificial Analysis index; higher is better) | Benchmark not available. |
Agentic Index Ability to complete multi-step agentic tasks | 40.8 (Artificial Analysis index; higher is better) | Benchmark not available. |
Best Design Arena Score Highest human-preference Elo score across design arenas | 1,315 Elo (#12 in Game Dev (60.2% win rate)) | Benchmark not available. |
At a Glance
Quick overview of what makes Claude Sonnet 4.6 and Sonar Reasoning Pro unique.
Claude Sonnet 4.6 by Anthropic understands both text and images, can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 1M token context window. Premium pricing at $3.00/M input and $15.00/M output tokens. Includes built-in content moderation for safer outputs. Released February 17th, 2026.Sonar Reasoning Pro by Perplexity understands both text and images, offers advanced reasoning. It can handle standard conversations with its 128K token context window. Reasonably priced at $2.00/M input and $8.00/M output tokens. Released March 7th, 2025.Explore More Comparisons
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