---
license: other
license_name: jamba-open-model-license
license_link: https://www.ai21.com/licenses/jamba-open-model-license
language:
- en
- fr
- de
- nl
- es
- pt
- it
- ar
- he
pipeline_tag: text-generation
tags:
- mamba
- jamba
- moe
---
# Model Information
The AI21 Jamba 1.5 family of models is state-of-the-art, hybrid SSM-Transformer instruction following foundation models. The Jamba models are the most powerful & efficient long-context models on the market, which deliver up to 2.5X faster inference than leading models of comparable sizes.
The models demonstrate superior long context handling, speed, and quality. They mark the first time a non-Transformer model has been successfully scaled to the quality and strength of the market’s leading models.
[Jamba 1.5 Mini](https://huggingface.co/ai21labs/AI21-Jamba-1.5-Mini) (12B active/52B total) and [Jamba 1.5 Large](https://huggingface.co/ai21labs/AI21-Jamba-1.5-Large) (94B active/398B total) are also optimized for business use cases and capabilities such as function calling, structured output (JSON), and grounded generation.
The models are released under the [Jamba Open Model License](https://www.ai21.com/licenses/jamba-open-model-license), a permissive license allowing full research use and commercial use under the license terms. If you need to license the model for your needs, [talk to us](https://www.ai21.com/talk-to-us).
For more details of this model, see the white paper and the release [blog post](https://www.ai21.com/blog/announcing-jamba-model-family).
## Model Details
- **Developed by:** [AI21](https://www.ai21.com)
- **Model type:** Joint Attention and Mamba (Jamba)
- **License:** [Jamba Open Model License](https://www.ai21.com/licenses/jamba-open-model-license)
- **Context length:** 256K
- **Knowledge cutoff date:** March 5, 2024
- **Supported languages:** English, Spanish, French, Portuguese, Italian, Dutch, German, Arabic and Hebrew
## Results on common benchmarks
| Benchmark | Jamba 1.5 Mini | Jamba 1.5 Large |
|--------------|:-----:|:-----:|
| Arena Hard | 46.1 | 65.4 |
| Wild Bench | 42.4 | 48.5 |
| MMLU (CoT) | 69.7 | 81.2 |
| MMLU Pro (CoT) | 42.5 | 53.5 |
| GPQA | 32.3 | 36.9 |
| ARC Challenge | 85.7 | 93 |
| BFCL | 80.6 | 85.5 |
| GSM-8K | 75.8 | 87 |
| RealToxicity (lower is better) | 8.1 | 6.7 |
| TruthfulQA | 54.1 | 58.3 |
### RULER Benchmark - Effective context length
|Models|Claimed Length|Effective Length|4K|8K|16K|32K|64K|128K|256K|
|:---:|:---:|:---:|:---:|:---:|:---:|:---:|:---:|:---:|:---:|
Jamba 1.5 Large (94B/398B)|256K|256K|96.7|96.6|96.4|96.0|95.4|95.1|93.9|
Jamba 1.5 Mini (12B/52B)|256K|256K|95.7|95.2|94.7|93.8|92.7|89.8|86.1 |
Gemini 1.5 Pro|1M|>128K|96.7|95.8|96.0|95.9|95.9|94.4| -- |
GPT-4 1106-preview |128K|64K|96.6|96.3|95.2|93.2|87.0|81.2| -- |
Llama 3.1 70B|128K|64K|96.5|95.8|95.4|94.8|88.4|66.6| -- |
Command R-plus (104B)|128K|32K|95.6|95.2|94.2|92.0|84.3|63.1| -- |
Llama 3.1 8B|128K|32K|95.5|93.8|91.6|87.4|84.7|77.0| -- |
Mistral Large 2 (123B)|128K|32K|96.2|96.1|95.1|93.0|78.8|23.7| -- |
Mixtral 8x22B (39B/141B)|64K|32K|95.6|94.9|93.4|90.9|84.7|31.7| -- |
Mixtral 8x7B (12.9B/46.7B)|32K|32K|94.9|92.1|92.5|85.9|72.4|44.5| -- |
### Multilingual MMLU
| Language | Jamba 1.5 Large | Jamba 1.5 Mini |
|:-------------:|:-----------------:|:----------------|
| **French** | 75.8 | 65.9 |
| **Spanish** | 75.5 | 66.3 |
| **Portuguese** | 75.5 | 66.7 |
| **Italian** | 75.2 | 65.1 |
| **Dutch** | 74.6 | 65.0 |
| **German** | 73.9 | 63.8 |
| **Arabic** | 67.1 | 57.3 |
# Usage
## Prerequisites
In order to run optimized Mamba implementations, you first need to install `mamba-ssm` and `causal-conv1d`:
```bash
pip install mamba-ssm causal-conv1d>=1.2.0
```
You also have to have the model on a CUDA device.
## Run the model with vLLM
The recommended way to perform efficient inference with Jamba 1.5 Mini is using [vLLM](https://docs.vllm.ai/en/latest/). First, make sure to install vLLM (version 0.5.4 or higher is required)
```bash
pip install vllm>=0.5.4
```
In the example below, `number_gpus` should match the number of GPUs you want to deploy Jamba 1.5 Mini on. A minimum of 2 80GB GPUs is required.
```python
from vllm import LLM, SamplingParams
from transformers import AutoTokenizer
model = "ai21labs/AI21-Jamba-1.5-Mini"
number_gpus = 2
llm = LLM(model=model,
max_model_len=200*1024,
tensor_parallel_size=number_gpus)
tokenizer = AutoTokenizer.from_pretrained(model)
messages = [
{"role": "system", "content": "You are an ancient oracle who speaks in cryptic but wise phrases, always hinting at deeper meanings."},
{"role": "user", "content": "Hello!"},
]
prompts = tokenizer.apply_chat_template(messages, add_generation_prompt=True, tokenize=False)
sampling_params = SamplingParams(temperature=0.4, top_p=0.95, max_tokens=100)
outputs = llm.generate(prompts, sampling_params)
generated_text = outputs[0].outputs[0].text
print(generated_text)
#Output: Seek and you shall find. The path is winding, but the journey is enlightening. What wisdom do you seek from the ancient echoes?
```
With the default BF16 precision on 2 80GB A100 GPUs and default vLLM configuration, you'll be able to perform inference on prompts up to 200K tokens long. On more than 2 80GB GPUs, you can easily fit the full 256K context.
Note: vLLM's `main` branch has some memory utilization improvements specific to the Jamba architecture that allow using the full 256K context length on 2 80 GPUs. You can [build vLLM from source](https://docs.vllm.ai/en/latest/getting_started/installation.html#build-from-source) if you wish to make use of them.
### ExpertsInt8 quantization
We've developed an innovative and efficient quantization technique, [ExpertsInt8](https://www.ai21.com/blog/announcing-jamba-model-family#:~:text=Like%20all%20models%20in%20its%20size%20class%2C%20Jamba%201.5%20Large%20can%E2%80%99t%20be%20loaded%20in%20full%20(FP32)%20or%20half%20(FP16/BF16)%20precision%20on%20a%20single%20node%20of%208%20GPUs.%20Dissatisfied%20with%20currently%20available%20quantization%20techniques%2C%20we%20developed%20ExpertsInt8%2C%20a%20novel%20quantization%20technique%20tailored%20for%20MoE%20models.), designed for MoE models deployed in vLLM, including Jamba models. Using it, you'll be able to deploy Jamba 1.5 Mini on a single 80GB GPU.
In order to use ExpertsInt8, you need to use vllm version 0.5.5 or higher: `pip install vllm>=0.5.5`
With default vLLM configuration, you can fit prompts up to 100K on a single 80GB A100 GPU:
```python
import os
os.environ['VLLM_FUSED_MOE_CHUNK_SIZE']='32768' # This is a workaround a bug in vLLM's fused_moe kernel
from vllm import LLM
llm = LLM(model="ai21labs/AI21-Jamba-1.5-Mini",
max_model_len=100*1024,
quantization="experts_int8")
```
## Run the model with `transformers`
The following example loads Jamba 1.5 Mini to the GPU in BF16 precision, uses optimized [FlashAttention2](https://github.com/Dao-AILab/flash-attention) and Mamba kernels, and parallelizes the model across multiple GPUs using [accelerate](https://huggingface.co/docs/accelerate/index). Note that in half precision (FP16/BF16), Jamba 1.5 Mini is too large to fit on a single 80GB GPU, so you'll need at least 2 such GPUs.
```python
import torch
from transformers import AutoModelForCausalLM, AutoTokenizer
model = AutoModelForCausalLM.from_pretrained("ai21labs/AI21-Jamba-1.5-Mini",
torch_dtype=torch.bfloat16,
attn_implementation="flash_attention_2",
device_map="auto")
tokenizer = AutoTokenizer.from_pretrained("ai21labs/AI21-Jamba-1.5-Mini")
messages = [
{"role": "system", "content": "You are an ancient oracle who speaks in cryptic but wise phrases, always hinting at deeper meanings."},
{"role": "user", "content": "Hello!"},
]
input_ids = tokenizer.apply_chat_template(messages, add_generation_prompt=True, return_tensors='pt').to(model.device)
outputs = model.generate(input_ids, max_new_tokens=216)
# Decode the output
conversation = tokenizer.decode(outputs[0], skip_special_tokens=True)
# Split the conversation to get only the assistant's response
assistant_response = conversation.split(messages[-1]['content'])[1].strip()
print(assistant_response)
# Output: Seek and you shall find. The path is winding, but the journey is enlightening. What wisdom do you seek from the ancient echoes?
```
Note: Versions 4.44.0 and 4.44.1 of `transformers` have a bug that restricts the ability to run the Jamba architecture. Make sure you're not using these versions.
Note: If you're having trouble installing `mamba-ssm` and `causal-conv1d` for the optimized Mamba kernels, you can run Jamba 1.5 Mini without them, at the cost of extra latency. In order to do that, add the kwarg `use_mamba_kernels=False` when loading the model via `AutoModelForCausalLM.from_pretained()`.
Load the model in 8-bit
**Using 8-bit precision, it is possible to fit up to 140K sequence length on a single 80GB GPU.** You can easily quantize the model to 8-bit using [bitsandbytes](https://huggingface.co/docs/bitsandbytes/index). In order to not degrade model quality, we recommend to exclude the Mamba blocks from the quantization:
```python
from transformers import AutoModelForCausalLM, BitsAndBytesConfig
quantization_config = BitsAndBytesConfig(load_in_8bit=True,
llm_int8_skip_modules=["mamba"])
model = AutoModelForCausalLM.from_pretrained("ai21labs/AI21-Jamba-1.5-Mini",
torch_dtype=torch.bfloat16,
attn_implementation="flash_attention_2",
quantization_config=quantization_config)
```
Load the model on CPU
If you don't have access to a GPU, you can also load and run Jamba 1.5 Mini on a CPU. Note this will result in poor inference performance.
```python
from transformers import AutoModelForCausalLM
model = AutoModelForCausalLM.from_pretrained("ai21labs/AI21-Jamba-1.5-Mini",
use_mamba_kernels=False)
```
Tool usage example
```python
from transformers import AutoTokenizer
tokenizer = AutoTokenizer.from_pretrained("ai21labs/AI21-Jamba-1.5-Mini")
messages = [
{
"role": "user",
"content": "What's the weather like right now in Jerusalem and in London?"
}
]
tools = [
{
'type': 'function',
'function': {
'name': 'get_current_weather',
'description': 'Get the current weather',
'parameters': {
'type': 'object',
'properties': {
'location': {'type': 'string', 'description': 'The city and state, e.g. San Francisco, CA'},
'format': {'type': 'string', 'enum': ['celsius', 'fahrenheit'], 'description': 'The temperature unit to use. Infer this from the users location.'}
},
'required': ['location', 'format']
}
}
}
]
prompt = tokenizer.apply_chat_template(
messages,
tools=tools,
tokenize=False,
)
```
Output:
```
[
{"name": "get_current_weather", "arguments": {"location": "Jerusalem", "format": "celsius"}},
{"name": "get_current_weather", "arguments": {"location": "celsius", "format": "celsius"}}
]
```
Feeding back tool responses into the model
Now that the model has called the tools, we need to feed the tool responses back to the model. In the next call, send the assistant message with the `tool_messages` field, as shown below, along with additional `tool` messages (in the corresponding order) that contain the tool outputs.
The `arguments` field for each tool call can be either a dict or a JSON string.
```python
from transformers import AutoTokenizer
tokenizer = AutoTokenizer.from_pretrained("ai21labs/AI21-Jamba-1.5-Mini")
# Note that you must send the tool responses in the same order as the model called the tools:
messages = [
{
"role": "user",
"content": "What's the weather like right now in Jerusalem and in London?"
},
{
"role": "assistant",
"content": null,
"tool_calls": [
{
"name": "get_current_weather",
"arguments": "{\"location\": \"Jerusalem\", \"format\": \"celsius\"}"
},
{
"name": "get_current_weather",
"arguments": "{\"location\": \"London\", \"format\": \"celsius\"}"
}
]
},
{
"role": "tool",
"content": "The weather in Jerusalem is 18 degrees celsius."
},
{
"role": "tool",
"content": "The weather in London is 8 degrees celsius."
}
]
tool_use_prompt = tokenizer.apply_chat_template(
messages,
tools=tools,
tokenize=False,
)
```
example output:
```
The weather in Jerusalem is currently 18 degrees Celsius. In London, it is 8 degrees Celsius.
```
Ataching documents to Jamba 1.5 prompt
```python
from transformers import AutoTokenizer
tokenizer = AutoTokenizer.from_pretrained("ai21labs/AI21-Jamba-1.5-Mini")
messages = [
{
"role": "user",
"content": "Who wrote Harry Potter?"
}
]
documents = [
{
"text": "Harry Potter is a series of seven fantasy novels written by British author J. K. Rowling.",
"title": "Harry Potter"
},
{
"text": "The Great Gatsby is a novel by American writer F. Scott Fitzgerald.",
"title": "The Great Gatsby",
"country": "United States",
"genre": "Novel"
}
]
prompt = tokenizer.apply_chat_template(
messages,
documents=documents,
tokenize=False,
)
# Output: J. K. Rowling
```
Usage of JSON knob in Jamba 1.5
```python
from transformers import AutoTokenizer
tokenizer = AutoTokenizer.from_pretrained("ai21labs/AI21-Jamba-1.5-Mini")
messages = [
{'role':'user',
'content':'Describe the first American president. Include year of birth (number) and name (string).'}
]
prompt = tokenizer.apply_chat_template(messages,
tokenize=False,
add_generation_prompt=False,
knobs={"response_format": "json_object", "is_set": True})
#Output: "{ "year of birth": 1732, "name": "George Washington." }"
```