# Llama 3.1 405B: AI model fact sheet

- **Provider:** meta
- **Released:** 2024-07-23
- **Context window:** 128,000 tokens
- **Parameters:** 405B
- **API pricing:** $2.70 / 1M input, $3.10 / 1M output
- **OpenRouter ID:** meta-llama/llama-3.1-405b-instruct
- **Capabilities:** conversation, reasoning, code-generation, analysis

Llama 3.1 405B is Meta's most powerful open-source model, outperforming even proprietary models on various benchmarks.

## Benchmarks

| Benchmark | Score |
| --- | --- |
| MMLU | 88.6% |
| MATH | 73.8% |
| GPQA | 51.1% |
| HumanEval | 89.0% |
| MGSM | 91.6% |
| Berkeley Function Calling (BFCL) | 88.5% |
| GSM8K | 96.8% |

Source: real side-by-side outputs, pricing and specs at https://rival.tips/models/llama-3.1-405b