Meta: Llama 3.1 405B Instruct
Analysis Summary
Meta: Llama 3.1 405B Instruct sits in the Legacy tier on our leaderboard, ranked #515 of 565 published models on overall intelligence. At $4.00 input and $4.00 output per 1M tokens, it is among the most expensive on the market. It offers a standard large context window.
Editorial notes
Llama 3.1 405B Instruct from Meta has no benchmark data in this record; at $4 per million tokens for both input and output it is expensive for an unverified variant, and the base model version with benchmarks is a better reference point.
Assessed May 31, 2026
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
Performance Profile
How Meta: Llama 3.1 405B Instruct compares
Its 131K-token context window is larger than 44% of the models we list. At $4.00 per million input tokens it is cheaper than 7% of comparable models.
About Meta: Llama 3.1 405B Instruct
The highly anticipated 400B class of Llama3 is here! Clocking in at 128k context with impressive eval scores, the Meta AI team continues to push the frontier of open-source LLMs. Meta's latest class of model (Llama 3.1) launched with a variety of sizes & flavors. This 405B instruct-tuned version is optimized for high quality dialogue usecases. It has demonstrated strong performance compared to leading closed-source models including GPT-4o and Claude 3.5 Sonnet in evaluations. Usage of this model is subject to Meta's Acceptable Use Policy.
Architecture Detail
| Instruct Type | llama3 |
How does Meta: Llama 3.1 405B Instruct stack up?
Compare side-by-side with other legacy models.
Model Information
| OpenRouter ID |
meta-llama/llama-3.1-405b-instruct
|
| Provider | meta-llama |
| Model Family | Llama 3 |
| Release Date | July 23, 2024 |
| Context Length | 131,000 tokens |
| Status | Active |
Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $4.00 | $0.004000 |
| Output | $4.00 | $0.004000 |
External Resources
Frequently asked questions about Meta: Llama 3.1 405B Instruct
How much does Meta: Llama 3.1 405B Instruct cost?
Meta: Llama 3.1 405B Instruct costs $4.00 per million input tokens and $4.00 per million output tokens.
What is the context window of Meta: Llama 3.1 405B Instruct?
Meta: Llama 3.1 405B Instruct has a context window of 131,000 tokens (131K).
Who created Meta: Llama 3.1 405B Instruct?
Meta: Llama 3.1 405B Instruct is developed by Meta and was released on July 23, 2024.
