
Llama 3.1 405B
Llama 3.1 405B is a language model with 405B parameters from Meta. It is currently free at 1 provider with up to 131K tokens of context. The model supports tool calling. Its weights are open, so it can also run locally.
- Developer
- Meta
- Parameters
- 405B
- Context
- 131K tokens
- Type
- Text
- License
- Open weights
Where to use Llama 3.1 405B for free
Each row is a separate free endpoint with its own limits.
| Provider | Context | Limit | Card | |
|---|---|---|---|---|
Together AI meta-llama/Llama-3.1-405B |
131K | Fair use (depends on server load) | — | Open |
Quick start
curl https://api.together.xyz/v1/chat/completions \
-H "Authorization: Bearer $TOGETHER_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "meta-llama/Llama-3.1-405B",
"messages": [{"role": "user", "content": "Hello!"}]
}'from openai import OpenAI
client = OpenAI(
base_url="https://api.together.xyz/v1",
api_key="YOUR_TOGETHER_API_KEY",
)
reply = client.chat.completions.create(
model="meta-llama/Llama-3.1-405B",
messages=[{"role": "user", "content": "Hello!"}],
)
print(reply.choices[0].message.content)import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://api.together.xyz/v1",
apiKey: process.env.TOGETHER_API_KEY,
});
const reply = await client.chat.completions.create({
model: "meta-llama/Llama-3.1-405B",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(reply.choices[0].message.content);Example for Together AI. Any OpenAI-compatible client works: Cursor, Cline, OpenCode, Open WebUI.
Benchmarks
Source: Artificial Analysis · Llama 3.1 Instruct 405B
Similar free models
FAQ
Is Llama 3.1 405B free?
Yes. As of October 31, 2026, Llama 3.1 405B is free at Together AI. Each provider has its own limits — see the table above.
What is the context window of Llama 3.1 405B?
The largest context among free routes is 131,072 tokens. Some providers cap it lower.
How do I call Llama 3.1 405B via API?
Use any OpenAI-compatible client with base URL https://api.together.xyz/v1, model ID meta-llama/Llama-3.1-405B, and a Together AI key.
How good is Llama 3.1 405B?
Artificial Analysis Intelligence Index: 7.3, GPQA Diamond: 52%. For comparison, the strongest free model in the catalog right now is GLM 5.3 Flash.
Is Llama 3.1 405B open-weight?
Yes, the weights are published — you can download and run it locally, for example with Ollama or LM Studio.