DeepSeek R1 0528 vs Grok 4.1 Fast
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Grok 4.1 Fast by xAI wins on 10 of 14 benchmarks against DeepSeek R1 0528 by DeepSeek, which leads on 3. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from the AI Value Index.
Category-by-Category Breakdown
General Intelligence: In general intelligence, Grok 4.1 Fast scores 1482 on Chatbot Arena ELO compared to DeepSeek R1 0528's 1375, while Grok 4.1 Fast scores 87.0% on MMLU-Pro compared to DeepSeek R1 0528's 84.0%.
Coding: In coding, both score 88.0% on HumanEval+, while Grok 4.1 Fast scores 60.0% on SWE-bench Verified compared to DeepSeek R1 0528's 55.0%, while Grok 4.1 Fast scores 62.0% on LiveCodeBench compared to DeepSeek R1 0528's 58.0%.
Math: In math, DeepSeek R1 0528 scores 96.0% on MATH compared to Grok 4.1 Fast's 89.0%, while DeepSeek R1 0528 scores 97.5% on GSM8K compared to Grok 4.1 Fast's 96.0%.
Reasoning: In reasoning, DeepSeek R1 0528 scores 81.0% on GPQA Diamond compared to Grok 4.1 Fast's 72.0%, while Grok 4.1 Fast scores 48.0% on ARC-AGI compared to DeepSeek R1 0528's 15.0%.
Context: In context, Grok 4.1 Fast scores 256K on Context Length compared to DeepSeek R1 0528's 131K.
Pricing Comparison
DeepSeek R1 0528 costs $0.55/1M input tokens and $2.2/1M output tokens, while Grok 4.1 Fast costs $0.20/1M input and $0.50/1M output. Grok 4.1 Fast is the more affordable option for API usage.
Speed Comparison
DeepSeek R1 0528 generates output at 40 tok/s compared to Grok 4.1 Fast's 120 tok/s, and the time to first token is 900 ms for DeepSeek R1 0528 versus 200 ms for Grok 4.1 Fast. Grok 4.1 Fast delivers faster throughput.
Verdict
For developers prioritizing math, DeepSeek R1 0528 has the edge. For those who value coding and general intelligence and affordability and speed, Grok 4.1 Fast is the stronger choice.
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DeepSeek R1 0528 vs Grok 4.1 Fast — FAQ
Which is better, DeepSeek R1 0528 or Grok 4.1 Fast?
Grok 4.1 Fast wins on more benchmarks overall (10 vs 3). However, the best choice depends on your specific needs — each model excels in different areas.
How does DeepSeek R1 0528 compare to Grok 4.1 Fast for coding?
Grok 4.1 Fast is better for coding, scoring 60.0% on SWE-bench Verified compared to 55.0%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is DeepSeek R1 0528 cheaper than Grok 4.1 Fast?
Yes, Grok 4.1 Fast is cheaper. DeepSeek R1 0528 costs $0.55/1M input and $2.2/1M output tokens. Grok 4.1 Fast costs $0.20/1M input and $0.50/1M output tokens.
Which is faster, DeepSeek R1 0528 or Grok 4.1 Fast?
Grok 4.1 Fast is faster, generating output at 120 tok/s compared to 40 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the DeepSeek R1 0528 vs Grok 4.1 Fast comparison cover?
This comparison covers 14 benchmarks including Chatbot Arena ELO, MMLU-Pro, HumanEval+, MATH, SWE-bench Verified, GPQA Diamond, Output Speed, Time to First Token, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.