DeepSeek-R1-0528 vs Grok-4.1 Fast Reasoning Comparison
Comparing DeepSeek-R1-0528 and Grok-4.1 Fast Reasoning across benchmarks, pricing, and capabilities.
Performance Benchmarks
Comparative analysis across standard metrics
DeepSeek-R1-0528 and Grok-4.1 Fast Reasoning don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, DeepSeek-R1-0528 ($0.50/1M tokens) is 2.5x more expensive than Grok-4.1 Fast Reasoning ($0.20/1M tokens).
For output processing, DeepSeek-R1-0528 ($2.15/1M tokens) is 4.3x more expensive than Grok-4.1 Fast Reasoning ($0.50/1M tokens).
In conclusion, DeepSeek-R1-0528 is more expensive than Grok-4.1 Fast Reasoning.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Grok-4.1 Fast Reasoning accepts 2,000,000 input tokens compared to DeepSeek-R1-0528's 131,072 tokens. DeepSeek-R1-0528 can generate longer responses up to 131,072 tokens, while Grok-4.1 Fast Reasoning is limited to 30,000 tokens.
Input Capabilities
Supported data types and modalities
Grok-4.1 Fast Reasoning supports multimodal inputs, whereas DeepSeek-R1-0528 does not.
Grok-4.1 Fast Reasoning can handle both text and other forms of data like images, making it suitable for multimodal applications.
DeepSeek-R1-0528
Grok-4.1 Fast Reasoning
License
Usage and distribution terms
DeepSeek-R1-0528 is licensed under MIT, while Grok-4.1 Fast Reasoning uses a proprietary license.
License differences may affect how you can use these models in commercial or open-source projects.
MIT
Open weights
Proprietary
Closed source
Release Timeline
When each model was launched
DeepSeek-R1-0528 was released on 2025-05-28, while Grok-4.1 Fast Reasoning was released on 2025-11-17.
Grok-4.1 Fast Reasoning is 6 months newer than DeepSeek-R1-0528.
May 28, 2025
9 months ago
Nov 17, 2025
3 months ago
5mo newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
DeepSeek-R1-0528 is available from DeepInfra, DeepSeek, Novita. Grok-4.1 Fast Reasoning is available from xAI. The availability of providers can affect quality of the model and reliability.
DeepSeek-R1-0528
Grok-4.1 Fast Reasoning
Outputs Comparison
Key Takeaways
DeepSeek-R1-0528
View detailsDeepSeek
Detailed Comparison
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