What is the difference between DeepSeek R1 and Llama 3.1 405B?

DeepSeek R1 is developed by DeepSeek while Llama 3.1 405B is developed by Meta AI. DeepSeek R1 has a 128K token context window vs Llama 3.1 405B's 128K. You can compare their actual outputs across 12 challenges on Rival to see how they differ in practice.

Which is better, DeepSeek R1 or Llama 3.1 405B?

It depends on your use case. DeepSeek R1 and Llama 3.1 405B each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 12 challenges so you can judge which fits your needs best.

How much does DeepSeek R1 cost compared to Llama 3.1 405B?

DeepSeek R1 costs $0.55/M input tokens and Llama 3.1 405B costs $2.7/M input tokens. DeepSeek R1 is $2.15/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 and Llama 3.1 405B on Rival?

This page shows a side-by-side comparison of DeepSeek R1 and Llama 3.1 405B 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.

Updated Feb 2025

DeepSeek R1vsLlama 3.1 405B

DeepSeek R1 is cheaper than Llama 3.1 405B at $0.55/M vs $2.7/M input tokens.

DeepSeek R1 and Llama 3.1 405B compared across 12 shared prompts
Spec	DeepSeek R1	Llama 3.1 405B
Input price	$0.55/M tokens	$2.7/M tokens
Output price	$2.19/M tokens	$3.1/M tokens
Context window	128K tokens	128K tokens
Parameters	671B (37B active)	405B
Weights	Open	Open
Free API (OpenRouter)	No	No
Released	Feb 2025	Jul 2024
MMLU	83.4%	88.6%

Our Verdict

DeepSeek R1

Llama 3.1 405B

Not enough votes to call it. On the specs, nothing separates them.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

DeepSeek R1

Input

$0.55

4.9× cheaper

Output

$2.19

1.4× cheaper

Llama 3.1 405B

Input

$2.70

Output

$3.10

DeepSeek R1 is cheaper on both: 4.9× input, 1.4× output.

Where to run it

1 host

DeepSeek R11 host

HostInOutContextUptime

Novitafp8$0.70 in$2.50 out64k100% up

Llama 3.1 405B

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 16 Sep 2026.

Writing DNA

Style Comparison

Similarity

38%

DeepSeek R1 uses 720.4x more bold

DeepSeek R1

Llama 3.1 405B

64%Vocabulary55%

15wSentence Length15w

0.48Hedging0.41

7.2Bold0.0

4.9Lists1.9

0.27Emoji0.03

0.57Headings0.00

0.25Transitions0.16

Based on 28 + 5 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Cost per 1M tokens

1 host

Style Comparison

What we learned reading every model

Common questions

What is the difference between DeepSeek R1 and Llama 3.1 405B?

Which is better, DeepSeek R1 or Llama 3.1 405B?

How much does DeepSeek R1 cost compared to Llama 3.1 405B?

How can I compare DeepSeek R1 and Llama 3.1 405B on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages

Cost per 1M tokens

1 host

Style Comparison

What we learned reading every model

Common questions

What is the difference between DeepSeek R1 and Llama 3.1 405B?

Which is better, DeepSeek R1 or Llama 3.1 405B?

How much does DeepSeek R1 cost compared to Llama 3.1 405B?

How can I compare DeepSeek R1 and Llama 3.1 405B on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages