Claude 3 Opus vs Llama 3.1 405B Instruct Comparison

Comparing Claude 3 Opus and Llama 3.1 405B Instruct across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

8 benchmarks

Claude 3 Opus outperforms in 0 benchmarks, while Llama 3.1 405B Instruct is better at 8 benchmarks (ARC-C, DROP, GPQA, GSM8k, HumanEval, MATH, MMLU, MMLU-Pro).

Llama 3.1 405B Instruct significantly outperforms across most benchmarks.

Mon Mar 16 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Llama 3.1 405B Instruct costs less

For input processing, Claude 3 Opus ($15.00/1M tokens) is 16.9x more expensive than Llama 3.1 405B Instruct ($0.89/1M tokens).

For output processing, Claude 3 Opus ($75.00/1M tokens) is 84.3x more expensive than Llama 3.1 405B Instruct ($0.89/1M tokens).

In conclusion, Claude 3 Opus is more expensive than Llama 3.1 405B Instruct.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers

Mon Mar 16 2026 • llm-stats.com

Claude 3 Opus

Input tokens$15.00

Output tokens$75.00

Best providerAnthropic

Llama 3.1 405B Instruct

Input tokens$0.89

Output tokens$0.89

Best providerLambda

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Context Window

Maximum input and output token capacity

Claude 3 Opus accepts 200,000 input tokens compared to Llama 3.1 405B Instruct's 128,000 tokens. Claude 3 Opus can generate longer responses up to 200,000 tokens, while Llama 3.1 405B Instruct is limited to 128,000 tokens.

Claude 3 Opus

Input200,000 tokens

Output200,000 tokens

Llama 3.1 405B Instruct

Input128,000 tokens

Output128,000 tokens

Mon Mar 16 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude 3 Opus supports multimodal inputs, whereas Llama 3.1 405B Instruct does not.

Claude 3 Opus can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude 3 Opus

Text

Images

Audio

Video

Llama 3.1 405B Instruct

Text

Images

Audio

Video

License

Usage and distribution terms

Claude 3 Opus is licensed under a proprietary license, while Llama 3.1 405B Instruct uses Llama 3.1 Community License.

License differences may affect how you can use these models in commercial or open-source projects.

Claude 3 Opus

Proprietary

Closed source

Llama 3.1 405B Instruct

Llama 3.1 Community License

Open weights

Release Timeline

When each model was launched

Claude 3 Opus was released on 2024-02-29, while Llama 3.1 405B Instruct was released on 2024-07-23.

Llama 3.1 405B Instruct is 5 months newer than Claude 3 Opus.

Claude 3 Opus

Feb 29, 2024

2.0 years ago

Llama 3.1 405B Instruct

Jul 23, 2024

1.6 years ago

4mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

Claude 3 Opus is available from Anthropic, Bedrock, Google. Llama 3.1 405B Instruct is available from Lambda, DeepInfra, Fireworks, Bedrock, Together, Hyperbolic, Google, Replicate. The availability of providers can affect quality of the model and reliability.