Llama 2 Models by AI at Meta
Last refreshed 2026-07-09. Next refresh: weekly.
Details
Capabilities
About
Llama 2, developed by Meta AI and released in July 2023, is a prominent family of large language models designed as an open-source alternative to proprietary chatbots. Its models, available in multiple sizes from 7 billion to 70 billion parameters, provide varying levels of accuracy balanced with computational efficiency. Llama 2 supports both research and commercial use, fostering greater accessibility and innovation in the AI community. Emphasizing safety and usefulness, the model employs techniques like reinforcement learning from human feedback (RLHF) and features specialized Llama 2-Chat models optimized for conversational applications. This makes it a versatile tool for various AI-driven tasks 1 2 3.
Decision facts
- Best fit
- structured outputschatbot and role-playing use cases
- Capability starting point
- Together AI Llama-2-7B-chat with 4k context and structured outputs
- Lowest tracked input
- Llama 2 7B Chat · $0.05/1M · Replicate API
- Closest related family
- MOSS-Audio
Current Variants
Use-when guidance is based on each model's tracked capabilities, context window, release date, and replacement status.
Use when the workload needs 4k context, 13B parameters, and structured outputs.
Use when the workload needs 4k context, 7B parameters, and structured outputs.
Use when the workload needs 4k context and 70B parameters.
Use when the workload needs 4k context and 13B parameters.
Use when the workload needs 4k context and 7B parameters.
Use when the workload needs 4k context and 34B parameters.
Use when the workload needs 4k context, 7B parameters, and structured outputs.
Use when the workload needs 4k context, 13B parameters, and structured outputs.
Use when the workload needs 4k context, 70B parameters, and structured outputs.
Use when the workload needs 4k context and 70B parameters.
Use when the workload needs 4k context, 70B parameters, and structured outputs.
Use when the workload needs 4k context and 70B parameters.
Use when the workload needs 4k context and 70B parameters.
| Model | Use when | Released | Signals | Status |
|---|---|---|---|---|
| Llama 2 13B Chat | Use when the workload needs 4k context, 13B parameters, and structured outputs. | 2023-07 | 4k context13B parametersstructured outputs | Current |
| Llama 2 7B Chat | Use when the workload needs 4k context, 7B parameters, and structured outputs. | 2023-07 | 4k context7B parametersstructured outputs | Current |
| Llama 2 70B | Use when the workload needs 4k context and 70B parameters. | 2023-07 | 4k context70B parameters | Current |
| Llama 2 13B | Use when the workload needs 4k context and 13B parameters. | 2023-07 | 4k context13B parameters | Current |
| Llama 2 7B | Use when the workload needs 4k context and 7B parameters. | 2023-07 | 4k context7B parameters | Current |
| Llama 2 34B (Unreleased) | Use when the workload needs 4k context and 34B parameters. | 2023-07 | 4k context34B parameters | Current |
| Together AI Llama-2-7B-chat | Use when the workload needs 4k context, 7B parameters, and structured outputs. | 2023-07 | 4k context7B parametersstructured outputs | Current |
| Together AI Llama-2-13B-chat | Use when the workload needs 4k context, 13B parameters, and structured outputs. | 2023-07 | 4k context13B parametersstructured outputs | Current |
| Together AI Llama-2-70B-chat | Use when the workload needs 4k context, 70B parameters, and structured outputs. | 2023-07 | 4k context70B parametersstructured outputs | Current |
| OctoML Llama-2-70b-chat | Use when the workload needs 4k context and 70B parameters. | 2023-07 | 4k context70B parameters | Current |
| Meta Llama 2 Chat 70B | Use when the workload needs 4k context, 70B parameters, and structured outputs. | 2023-07 | 4k context70B parametersstructured outputs | Current |
| Llama 2 70B Chat on IBM Watsonx | Use when the workload needs 4k context and 70B parameters. | 2023-07 | 4k context70B parameters | Current |
| Vultr Llama 2 70B | Use when the workload needs 4k context and 70B parameters. | 2023-07 | 4k context70B parameters | Current |
Release Timeline
1 release groupSpecifications(14 models)
| Model | Released | Context | Parameters | Structured Outputs |
|---|---|---|---|---|
| Llama 2 13B Chat | 2023-07 | 4k | 13B | Yes |
| Llama 2 7B Chat | 2023-07 | 4k | 7B | Yes |
| Llama 2 70B | 2023-07 | 4k | 70B | No |
| Llama 2 13B | 2023-07 | 4k | 13B | No |
| Llama 2 7B | 2023-07 | 4k | 7B | No |
| Llama 2 34B (Unreleased) | 2023-07 | 4k | 34B | No |
| Together AI Llama-2-7B-chat | 2023-07 | 4k | 7B | Yes |
| Together AI Llama-2-13B-chat | 2023-07 | 4k | 13B | Yes |
| Together AI Llama-2-70B-chat | 2023-07 | 4k | 70B | Yes |
| OctoML Llama-2-70b-chat | 2023-07 | 4k | 70B | No |
| Meta Llama 2 Chat 70B | 2023-07 | 4k | 70B | Yes |
| Llama 2 70B Chat on IBM Watsonx | 2023-07 | 4k | 70B | No |
| Vultr Llama 2 70B | 2023-07 | 4k | 70B | No |
Available From(17 providers)
Pricing
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Models(14)
Llama 2 13B Chat
Llama 2 7B Chat
Llama 2 70B
Llama 2 13B
Llama 2 7B
Llama 2 34B (Unreleased)
Together AI Llama-2-7B-chat
Together AI Llama-2-13B-chat
Together AI Llama-2-70B-chat
OctoML Llama-2-70b-chat
Meta Llama 2 Chat 70B
Llama 2 70B Chat on IBM Watsonx
Vultr Llama 2 70B