Meta model product
Llama 3.1 405B
1 405B Instruct is a large language model optimized for multilingual dialogue use cases.
Updated Aug 12, 2026. Default version: Llama 3.1 405B Instruct
LLMBoard score24.5Llama 3.1 405B Instruct
Coverage80%17 benchmark families
Context window128KTokens
Official input priceN/AOfficial price unavailable
Llama 3.1 405B Specifications
Technical details for the model's default version.
- Version
- Llama 3.1 405B Instruct
- Released
- Jul 23, 2024
- Knowledge cutoff
- Unknown
- Parameters
- 405B
- Context window
- 128K
- Max output
- 128K
- Inputs
- text
- Outputs
- text
- Open weights
- No
- License
- Llama 3.1 Community License
Llama 3.1 405B Capability Profile
This profile uses the model's current scored version. Arena ratings and prices are shown separately.
Llama 3.1 405B Benchmark Results
Benchmark scores for Llama 3.1 405B Instruct.
| API-Bank | 0.9 | 1 | 3 | 100.0% | C | |
| BFCL | 0.9 | 1 | 11 | 100.0% | C | |
| Gorilla Benchmark API Bench | 0.4 | 1 | 3 | 100.0% | C | |
| MBPP EvalPlus | 0.9 | 1 | 2 | 100.0% | C | |
| MMLU (CoT) | 0.9 | 1 | 3 | 100.0% | C | |
| Multilingual MGSM (CoT) | 0.9 | 1 | 3 | 100.0% | C | |
| Multipl-E HumanEval | 0.8 | 1 | 3 | 100.0% | C | |
| Multipl-E MBPP | 0.7 | 1 | 3 | 100.0% | C | |
| Nexus | 0.6 | 1 | 4 | 100.0% | C | |
| ARC-C | 1.0 | 2 | 34 | 97.0% | C | |
| GSM8k | 1.0 | 5 | 48 | 91.5% | C | |
| DROP | 0.8 | 7 | 30 | 79.3% | C | |
| HumanEval | 0.9 | 17 | 66 | 75.4% | C | |
| IFEval | 0.9 | 25 | 65 | 62.5% | C | |
| MMLU | 0.9 | 26 | 100 | 74.8% | C | |
| MATH | 0.7 | 30 | 71 | 58.6% | C | |
| MMLU-Pro | 0.7 | 76 | 129 | 41.4% | C | |
| GPQA | 0.5 | 175 | 234 | 25.3% | C |
Llama 3.1 405B Arena Results
Preference and agent-evaluation results for the default version.
| text style control | overall | 215 | 1335.0 | 41,375 | N/A | |
| text style control | overall | 217 | 1333.2 | 59,656 | N/A | |
| text | overall | 235 | 1283.8 | 41,375 | N/A | |
| text | overall | 240 | 1281.9 | 59,656 | N/A |
Llama 3.1 405B Pricing
Official vendor API pricing appears first, followed by individual provider offers.
- Official API
- N/A
- Official provider
- N/A
- Lowest third-party
- From $1.95 input, $1.95 output per 1M via Cortecs
- Tracked offerings
- 1
| Cortecs | llama-3.1-405b-instruct | global | $1.95 | $1.95 | 128K |
Official prices use only the vendor's configured official Provider and positive standard USD PAYG rates. Third-party offers remain explicitly labeled.
Llama 3.1 405B Versions
Available versions of this model. The score column identifies the version used in the overall ranking.
| Llama 3.1 405B Instruct | 24.5 | 405B | 128K | 128K | No | Llama 3.1 Community License |
What is Llama 3.1 405B?
Key information about Llama 3.1 405B and its available data.
1 405B Instruct is a large language model optimized for multilingual dialogue use cases. It outperforms many available open source and closed chat models on common industry benchmarks. The model supports 8 languages and has a 128K token context length.
Data as of 2026-08-11.
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FAQ
Common questions about Llama 3.1 405B.
When was Llama 3.1 405B released?
Llama 3.1 405B's default version was released on Jul 23, 2024.
How much does Llama 3.1 405B cost?
No official standard PAYG price is currently available for Llama 3.1 405B. The lowest tracked third-party offer starts at $1.95 input and $1.95 output via Cortecs.
Who created Llama 3.1 405B?
Llama 3.1 405B was created by Meta.
What is the context window for Llama 3.1 405B?
The default version has a 128K token context window.
Is Llama 3.1 405B open weight?
No. The default version is not marked as having publicly available weights.
How many API providers offer Llama 3.1 405B?
1 provider offerings are linked to the default version.
What models should I compare Llama 3.1 405B with?
Nearby ranked alternatives include QwQ 32B, Qwen3 VL 8B, GPT-4.1-mini.