Meta: Llama 3.1 405B (base)
Analysis Summary
Meta: Llama 3.1 405B (base) sits in the Professional tier on our leaderboard, ranked #10 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 mid-sized context window.
Editorial notes
Llama 3.1 405B base from Meta reaches an intelligence index of 17.4 with strong MMLU-Pro and instruction-following scores across a 32K context; at $4 per million tokens it is expensive for a base model without tool use or vision, limiting business deployment flexibility.
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 (base) compares
Meta: Llama 3.1 405B (base) ranks #191 of 370 AI models we track for overall intelligence, #178 of 307 for coding, #231 of 282 for agentic tasks. Its 33K-token context window is larger than 32% 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 (base)
Meta's latest class of model (Llama 3.1) launched with a variety of sizes & flavors. This is the base 405B pre-trained version. It has demonstrated strong performance compared to leading closed-source models in human evaluations. Usage of this model is subject to Meta's Acceptable Use Policy.
Architecture Detail
| Instruct Type | none |
Performance Indices
Source: Artificial Analysis
Benchmark Scores
Intelligence
Technical
Content
Benchmark data from Artificial Analysis and Hugging Face
How does Meta: Llama 3.1 405B (base) stack up?
Compare side-by-side with other professional models.
Model Information
| OpenRouter ID |
meta-llama/llama-3.1-405b
|
| Provider | meta-llama |
| Model Family | Llama 3 |
| Release Date | August 2, 2024 |
| Context Length | 32,768 tokens |
| Max Completion | 32,768 tokens |
| Status | Active |
Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $4.00 | $0.004000 |
| Output | $4.00 | $0.004000 |
Leaderboard Categories
External Resources
Frequently asked questions about Meta: Llama 3.1 405B (base)
How much does Meta: Llama 3.1 405B (base) cost?
Meta: Llama 3.1 405B (base) 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 (base)?
Meta: Llama 3.1 405B (base) has a context window of 32,768 tokens (33K).
Is Meta: Llama 3.1 405B (base) good for coding?
On our coding benchmark index, Meta: Llama 3.1 405B (base) ranks #178 of 307 models, placing it in the broader range of the field for code generation and debugging.
Who created Meta: Llama 3.1 405B (base)?
Meta: Llama 3.1 405B (base) is developed by Meta and was released on August 2, 2024.
