Llama 3.1 405B
Meta (via providers)Llama 3.1 405B by Meta (via providers) costs $3.5/M input, $3.5/M output with 128K context window. Updated February 2026. Compare with GPT-5, Claude, Gemini & 40+ models.
Input Price
$3.50
per 1M tokens
Output Price
$3.50
per 1M tokens
Context Window
128K
tokens
Specifications
| Provider | Meta (via providers) |
| Model ID | llama-3-1-405b |
| Input Price | $3.5 / 1M tokens |
| Output Price | $3.5 / 1M tokens |
| Context Window | 128K tokens |
| Max Output | 4K tokens |
| Capabilities | textfunction_calling |
| Release Date | 2024-07 |
| Notes | Open-source. Pricing varies by hosting provider. |
Monthly Cost Estimates
Estimated monthly costs based on different daily usage levels (assuming 50% input / 50% output split).
| Daily Tokens | Monthly Cost | Annual Cost |
|---|---|---|
| 10K | $1.05 | $12.60 |
| 50K | $5.25 | $63.00 |
| 100K | $10.50 | $126.00 |
| 500K | $52.50 | $630.00 |
| 1.0M | $105.00 | $1260.00 |
About Llama 3.1 405B
Llama 3.1 405B is a large language model by Meta (via providers). It features a 128K token context window with up to 4K tokens of output per request. The model supports 2 capabilities: text, function_calling.
At $3.5 per million input tokens and $3.5 per million output tokens, Llama 3.1 405B is positioned as a mid-range option in the Meta (via providers) lineup. Use our Token Counter to estimate how many tokens your prompts use, and our Pricing Calculator to compare costs across all models.
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FAQ
How much does Llama 3.1 405B cost?
Llama 3.1 405B costs $3.5 per million input tokens and $3.5 per million output tokens. For a typical workload of 100K tokens/day, expect approximately $15.75/month.
What is Llama 3.1 405B's context window?
Llama 3.1 405B supports a context window of 128K tokens. This means your combined input prompt and output response can be up to 128K tokens. The maximum output per response is 4K tokens.
Is Llama 3.1 405B good for my use case?
Llama 3.1 405B supports text, function_calling. As a mid-range model, it balances capability and cost for most production use cases. Use our Pricing Calculator to compare with alternatives.