 Grok Code Fast 1 |  Sonar Reasoning Pro | |
|---|---|---|
Model Provider The organization behind this AI's development | XAI | Perplexity |
Input Context Window Maximum input tokens this model can process at once | 256K tokens | 128K tokens |
Output Token Limit Maximum output tokens this model can generate at once | 10K tokens | Not specified tokens |
Release Date When this model first became publicly available | August 26, 2025 9 days ago August 26th, 2025 | March 7, 2025 6 months ago March 7th, 2025 |
Grok Code Fast 1 | Sonar Reasoning Pro | |
|---|---|---|
Input Types Supported input formats | 📝Text | 📝Text🖼️Image |
Output Types Supported output formats | 📝Text | 📝Text |
Tokenizer Text encoding system | Grok | Other |
Key Features Advanced capabilities | ✓Function Calling✓Structured Output✓Reasoning ModeContent Moderation | Function CallingStructured Output✓Reasoning ModeContent Moderation |
| Grok Code Fast 1 | Sonar Reasoning Pro | |
|---|---|---|
Input Token Cost Cost per million input tokens | $0.20 per million tokens | $2.00 per million tokens |
Output Token Cost Cost per million outut tokens | $1.50 per million tokens | $8.00 per million tokens |
| Grok Code Fast 1 | Sonar Reasoning Pro | |
|---|---|---|
MMLU Measures knowledge across 57 subjects like law, math, history, and science | Benchmark not available. | Benchmark not available. |
MMMU Measures understanding of combined text and images across various domains | Benchmark not available. | Benchmark not available. |
HellaSwag Measures common sense reasoning by having models complete sentences about everyday situations | Benchmark not available. | Benchmark not available. |
Grok Code Fast 1 by XAI can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 256K token context window. Very affordable at $0.20/M input and $1.50/M output tokens. Released August 26th, 2025.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.Compare your models with top performers across different categories
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