# Llama 3.1 405B Instruct

> Meta's Llama 3.1 405B Instruct is the flagship open-weight model of the Llama 3.1 family, with strong reasoning, coding, and multilingual performance and a 128k context window. Unpublished after GitHub Models retired (HTTP 410); no replacement platform backend.


**ID**: `meta/llama-3.1-405b-instruct`  
**Creator**: meta  
**Category**: text  
**Context**: Not published  
**Status**: Disabled (since 2026-08-14) — no longer routable or listed; kept for history/usage reference.  
**Reason**: GitHub Models retired 2026-07-30 (HTTP 410; smoke 2026-08-14). Only platform backend was github. Do not re-enable unless a non-GitHub free/platform route appears.  
**Input**: $0  
**Output**: $0  
**Released**: 2024-07-23  
**Web page**: https://anyrouter.dev/model/meta/llama-3.1-405b-instruct

**Input modalities**: text  
**Output modalities**: text  

**Capabilities**: chat, streaming, coding, function-calling

## Usage

**Endpoint**: `POST https://anyrouter.dev/api/v1/chat/completions`

```bash
curl https://anyrouter.dev/api/v1/chat/completions \
  -H "Authorization: Bearer $ANYROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "meta/llama-3.1-405b-instruct",
  "messages": [
    {
      "role": "user",
      "content": "Say hi in 3 words."
    }
  ]
}'
```

## Providers

| Provider | Input | Output |
| --- | --- | --- |
| meta | $0 | $0 |

## Benchmarks

- **GPQA Diamond**: 0.5
- **MATH Level 5**: 0.5
- **OTIS Mock AIME**: 0.1

Benchmark data from [Epoch AI](https://epoch.ai/benchmarks) (CC-BY 4.0).

## Source

- Upstream docs: https://github.com/marketplace/models