What is the difference between DeepSeek R1 0528 and xAI: Grok 4 Fast (free)?

DeepSeek R1 0528 is developed by DeepSeek while xAI: Grok 4 Fast (free) is developed by xAI. DeepSeek R1 0528 has a 164K token context window vs xAI: Grok 4 Fast (free)'s 2.0M. You can compare their actual outputs across 34 challenges on Rival to see how they differ in practice.

Which is better, DeepSeek R1 0528 or xAI: Grok 4 Fast (free)?

It depends on your use case. DeepSeek R1 0528 and xAI: Grok 4 Fast (free) each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 34 challenges so you can judge which fits your needs best.

How much does DeepSeek R1 0528 cost compared to xAI: Grok 4 Fast (free)?

DeepSeek R1 0528 costs $0/M input tokens and xAI: Grok 4 Fast (free) costs $0/M input tokens. xAI: Grok 4 Fast (free) is $0.00/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare DeepSeek R1 0528 and xAI: Grok 4 Fast (free) on Rival?

This page shows a side-by-side comparison of DeepSeek R1 0528 and xAI: Grok 4 Fast (free) across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

What is the difference between DeepSeek R1 0528 and xAI: Grok 4 Fast (free)?

DeepSeek R1 0528 is developed by DeepSeek while xAI: Grok 4 Fast (free) is developed by xAI. DeepSeek R1 0528 has a 164K token context window vs xAI: Grok 4 Fast (free)'s 2.0M. You can compare their actual outputs across 34 challenges on Rival to see how they differ in practice.

Which is better, DeepSeek R1 0528 or xAI: Grok 4 Fast (free)?

It depends on your use case. DeepSeek R1 0528 and xAI: Grok 4 Fast (free) each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 34 challenges so you can judge which fits your needs best.

How much does DeepSeek R1 0528 cost compared to xAI: Grok 4 Fast (free)?

DeepSeek R1 0528 costs $0/M input tokens and xAI: Grok 4 Fast (free) costs $0/M input tokens. xAI: Grok 4 Fast (free) is $0.00/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare DeepSeek R1 0528 and xAI: Grok 4 Fast (free) on Rival?

This page shows a side-by-side comparison of DeepSeek R1 0528 and xAI: Grok 4 Fast (free) across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

DeepSeek R1 0528 vs xAI: Grok 4 Fast (free): Which Is Better?

Updated Sep 2025

Our Verdict

DeepSeek R1 0528

xAI: Grok 4 Fast (free)

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call

API pricing

Cost per 1M tokens

DeepSeek R1 0528

Input

$0.000

Output

$0.000

xAI: Grok 4 Fast (free)

Input

$0.000

Output

$0.000

Writing DNA

Style Comparison

Similarity

53%

xAI: Grok 4 Fast (free) uses 27.9x more transitions

DeepSeek R1 0528

xAI: Grok 4 Fast (free)

64%Vocabulary65%

10wSentence Length13w

0.30Hedging0.56

6.8Bold1.4

4.9Lists2.5

0.00Emoji0.00

0.40Headings1.58

0.00Transitions0.28

Based on 4 + 14 text responses

Research

What we learned reading every model

DeepSeek R1 0528 and xAI: Grok 4 Fast (free) have opinions about your brand too.Ask 10 models what they tell people about you. Verbatim receipts.Run the mirror

FAQ

Common questions

Keep exploring

More comparisons

DeepSeek R1 0528 vs MiniMax M3New provider

DeepSeek R1 0528 vs OpenAI o3New provider

DeepSeek R1 0528 vs Llama 4 MaverickNew provider

Updated Sep 2025

Our Verdict

DeepSeek R1 0528

xAI: Grok 4 Fast (free)

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call

API pricing

Cost per 1M tokens

DeepSeek R1 0528

Input

$0.000

Output

$0.000

xAI: Grok 4 Fast (free)

Input

$0.000

Output

$0.000

Writing DNA

Style Comparison

Similarity

53%

xAI: Grok 4 Fast (free) uses 27.9x more transitions

DeepSeek R1 0528

xAI: Grok 4 Fast (free)

64%Vocabulary65%

10wSentence Length13w

0.30Hedging0.56

6.8Bold1.4

4.9Lists2.5

0.00Emoji0.00

0.40Headings1.58

0.00Transitions0.28

Based on 4 + 14 text responses

Research

What we learned reading every model

DeepSeek R1 0528 and xAI: Grok 4 Fast (free) have opinions about your brand too.Ask 10 models what they tell people about you. Verbatim receipts.Run the mirror

FAQ

Common questions

Keep exploring

More comparisons

DeepSeek R1 0528 vs MiniMax M3New provider

DeepSeek R1 0528 vs OpenAI o3New provider

DeepSeek R1 0528 vs Llama 4 MaverickNew provider