Llama 3.3 70BvsLlama 3.1 405B
Meta AI vs Meta AI — Side-by-side model comparison
Head-to-Head Comparison
| Metric | Llama 3.3 70B | Llama 3.1 405B |
|---|---|---|
| Provider | ||
| Arena Rank | #13 | #9 |
| Context Window | 128K | 128K |
| Input Pricing | Free (open)/1M tokens | Free (open)/1M tokens |
| Output Pricing | Free (open)/1M tokens | Free (open)/1M tokens |
| Parameters | 70B | 405B |
| Open Source | Yes | Yes |
| Best For | Instruction following, coding, reasoning | Complex reasoning, coding, multilingual tasks |
| Release Date | Dec 6, 2024 | Jul 23, 2024 |
Llama 3.3 70B
Llama 3.3 70B is Meta's latest iteration of the 70B parameter class, delivering performance that approaches the much larger Llama 3.1 405B model at a fraction of the computational cost. It features improved instruction following, stronger coding abilities, and better reasoning compared to Llama 3.1 70B. This model demonstrates how continued training and optimization can dramatically improve performance at the same parameter count, making frontier-level AI more accessible.
View Meta AI profile →Llama 3.1 405B
Llama 3.1 405B is Meta's largest and most capable open-source language model, representing a major milestone as the first open model to rival top proprietary systems like GPT-4 and Claude 3.5 Sonnet across many benchmarks. With 405 billion parameters and a 128K context window, it excels at complex reasoning, coding, multilingual translation, and tool use. Its open-weight nature has made it a foundation for the open-source AI ecosystem, enabling organizations to deploy frontier-level AI without vendor lock-in.
View Meta AI profile →Key Differences: Llama 3.3 70B vs Llama 3.1 405B
Llama 3.1 405B ranks higher in arena benchmarks (#9) indicating stronger overall performance.
Llama 3.3 70B has 70B parameters vs Llama 3.1 405B's 405B, which affects inference speed and capability.
When to use Llama 3.3 70B
- +Your use case involves instruction following, coding, reasoning
When to use Llama 3.1 405B
- +You need the highest quality output based on arena rankings
- +Your use case involves complex reasoning, coding, multilingual tasks
The Verdict
Llama 3.1 405B wins our head-to-head comparison with 2 out of 5 category wins. It's the stronger choice for complex reasoning, coding, multilingual tasks, though Llama 3.3 70B holds an edge in instruction following, coding, reasoning.
Last compared: March 2026 · Data sourced from public benchmarks and official pricing pages