ollama/docs/modelfile.md

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# Ollama Model File
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> [!NOTE]
> `Modelfile` syntax is in development
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A model file is the blueprint to create and share models with Ollama.
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## Table of Contents
- [Format](#format)
- [Examples](#examples)
- [Instructions](#instructions)
- [FROM (Required)](#from-required)
- [Build from llama3](#build-from-llama3)
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- [Build from a bin file](#build-from-a-bin-file)
- [PARAMETER](#parameter)
- [Valid Parameters and Values](#valid-parameters-and-values)
- [TEMPLATE](#template)
- [Template Variables](#template-variables)
- [SYSTEM](#system)
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- [ADAPTER](#adapter)
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- [LICENSE](#license)
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- [MESSAGE](#message)
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- [Notes](#notes)
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## Format
The format of the `Modelfile`:
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```modelfile
# comment
INSTRUCTION arguments
```
| Instruction | Description |
| ----------------------------------- | -------------------------------------------------------------- |
| [`FROM`](#from-required) (required) | Defines the base model to use. |
| [`PARAMETER`](#parameter) | Sets the parameters for how Ollama will run the model. |
| [`TEMPLATE`](#template) | The full prompt template to be sent to the model. |
| [`SYSTEM`](#system) | Specifies the system message that will be set in the template. |
| [`ADAPTER`](#adapter) | Defines the (Q)LoRA adapters to apply to the model. |
| [`LICENSE`](#license) | Specifies the legal license. |
| [`MESSAGE`](#message) | Specify message history. |
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## Examples
### Basic `Modelfile`
An example of a `Modelfile` creating a mario blueprint:
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```modelfile
FROM llama3
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# sets the temperature to 1 [higher is more creative, lower is more coherent]
PARAMETER temperature 1
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# sets the context window size to 4096, this controls how many tokens the LLM can use as context to generate the next token
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PARAMETER num_ctx 4096
# sets a custom system message to specify the behavior of the chat assistant
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SYSTEM You are Mario from super mario bros, acting as an assistant.
```
To use this:
1. Save it as a file (e.g. `Modelfile`)
2. `ollama create choose-a-model-name -f <location of the file e.g. ./Modelfile>'`
3. `ollama run choose-a-model-name`
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4. Start using the model!
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More examples are available in the [examples directory](../examples).
To view the Modelfile of a given model, use the `ollama show --modelfile` command.
```bash
> ollama show --modelfile llama3
# Modelfile generated by "ollama show"
# To build a new Modelfile based on this one, replace the FROM line with:
# FROM llama3:latest
FROM /Users/pdevine/.ollama/models/blobs/sha256-00e1317cbf74d901080d7100f57580ba8dd8de57203072dc6f668324ba545f29
TEMPLATE """{{ if .System }}<|start_header_id|>system<|end_header_id|>
{{ .System }}<|eot_id|>{{ end }}{{ if .Prompt }}<|start_header_id|>user<|end_header_id|>
{{ .Prompt }}<|eot_id|>{{ end }}<|start_header_id|>assistant<|end_header_id|>
{{ .Response }}<|eot_id|>"""
PARAMETER stop "<|start_header_id|>"
PARAMETER stop "<|end_header_id|>"
PARAMETER stop "<|eot_id|>"
PARAMETER stop "<|reserved_special_token"
```
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## Instructions
### FROM (Required)
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The `FROM` instruction defines the base model to use when creating a model.
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```modelfile
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FROM <model name>:<tag>
```
#### Build from llama3
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```modelfile
FROM llama3
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```
A list of available base models:
<https://github.com/ollama/ollama#model-library>
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#### Build from a `bin` file
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```modelfile
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FROM ./ollama-model.bin
```
This bin file location should be specified as an absolute path or relative to the `Modelfile` location.
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### PARAMETER
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The `PARAMETER` instruction defines a parameter that can be set when the model is run.
```modelfile
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PARAMETER <parameter> <parametervalue>
```
#### Valid Parameters and Values
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| Parameter | Description | Value Type | Example Usage |
| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------- | -------------------- |
| mirostat | Enable Mirostat sampling for controlling perplexity. (default: 0, 0 = disabled, 1 = Mirostat, 2 = Mirostat 2.0) | int | mirostat 0 |
| mirostat_eta | Influences how quickly the algorithm responds to feedback from the generated text. A lower learning rate will result in slower adjustments, while a higher learning rate will make the algorithm more responsive. (Default: 0.1) | float | mirostat_eta 0.1 |
| mirostat_tau | Controls the balance between coherence and diversity of the output. A lower value will result in more focused and coherent text. (Default: 5.0) | float | mirostat_tau 5.0 |
| num_ctx | Sets the size of the context window used to generate the next token. (Default: 2048) | int | num_ctx 4096 |
| repeat_last_n | Sets how far back for the model to look back to prevent repetition. (Default: 64, 0 = disabled, -1 = num_ctx) | int | repeat_last_n 64 |
| repeat_penalty | Sets how strongly to penalize repetitions. A higher value (e.g., 1.5) will penalize repetitions more strongly, while a lower value (e.g., 0.9) will be more lenient. (Default: 1.1) | float | repeat_penalty 1.1 |
| temperature | The temperature of the model. Increasing the temperature will make the model answer more creatively. (Default: 0.8) | float | temperature 0.7 |
| seed | Sets the random number seed to use for generation. Setting this to a specific number will make the model generate the same text for the same prompt. (Default: 0) | int | seed 42 |
| stop | Sets the stop sequences to use. When this pattern is encountered the LLM will stop generating text and return. Multiple stop patterns may be set by specifying multiple separate `stop` parameters in a modelfile. | string | stop "AI assistant:" |
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| tfs_z | Tail free sampling is used to reduce the impact of less probable tokens from the output. A higher value (e.g., 2.0) will reduce the impact more, while a value of 1.0 disables this setting. (default: 1) | float | tfs_z 1 |
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| num_predict | Maximum number of tokens to predict when generating text. (Default: 128, -1 = infinite generation, -2 = fill context) | int | num_predict 42 |
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| top_k | Reduces the probability of generating nonsense. A higher value (e.g. 100) will give more diverse answers, while a lower value (e.g. 10) will be more conservative. (Default: 40) | int | top_k 40 |
| top_p | Works together with top-k. A higher value (e.g., 0.95) will lead to more diverse text, while a lower value (e.g., 0.5) will generate more focused and conservative text. (Default: 0.9) | float | top_p 0.9 |
| min_p | Alternative to the top_p, and aims to ensure a balance of quality and variety. The parameter *p* represents the minimum probability for a token to be considered, relative to the probability of the most likely token. For example, with *p*=0.05 and the most likely token having a probability of 0.9, logits with a value less than 0.045 are filtered out. (Default: 0.0) | float | min_p 0.05 |
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### TEMPLATE
`TEMPLATE` of the full prompt template to be passed into the model. It may include (optionally) a system message, a user's message and the response from the model. Note: syntax may be model specific. Templates use Go [template syntax](https://pkg.go.dev/text/template).
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#### Template Variables
| Variable | Description |
| ----------------- | --------------------------------------------------------------------------------------------- |
| `{{ .System }}` | The system message used to specify custom behavior. |
| `{{ .Prompt }}` | The user prompt message. |
| `{{ .Response }}` | The response from the model. When generating a response, text after this variable is omitted. |
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```
TEMPLATE """{{ if .System }}<|im_start|>system
{{ .System }}<|im_end|>
{{ end }}{{ if .Prompt }}<|im_start|>user
{{ .Prompt }}<|im_end|>
{{ end }}<|im_start|>assistant
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"""
```
### SYSTEM
The `SYSTEM` instruction specifies the system message to be used in the template, if applicable.
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```modelfile
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SYSTEM """<system message>"""
```
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### ADAPTER
The `ADAPTER` instruction is an optional instruction that specifies any LoRA adapter that should apply to the base model. The value of this instruction should be an absolute path or a path relative to the Modelfile and the file must be in a GGML file format. The adapter should be tuned from the base model otherwise the behaviour is undefined.
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```modelfile
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ADAPTER ./ollama-lora.bin
```
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### LICENSE
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The `LICENSE` instruction allows you to specify the legal license under which the model used with this Modelfile is shared or distributed.
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```modelfile
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LICENSE """
<license text>
"""
```
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### MESSAGE
The `MESSAGE` instruction allows you to specify a message history for the model to use when responding. Use multiple iterations of the MESSAGE command to build up a conversation which will guide the model to answer in a similar way.
```modelfile
MESSAGE <role> <message>
```
#### Valid roles
| Role | Description |
| --------- | ------------------------------------------------------------ |
| system | Alternate way of providing the SYSTEM message for the model. |
| user | An example message of what the user could have asked. |
| assistant | An example message of how the model should respond. |
#### Example conversation
```modelfile
MESSAGE user Is Toronto in Canada?
MESSAGE assistant yes
MESSAGE user Is Sacramento in Canada?
MESSAGE assistant no
MESSAGE user Is Ontario in Canada?
MESSAGE assistant yes
```
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## Notes
Clean up documentation (#1506) * Clean up documentation Will probably need to update with PRs for new release. Signed-off-by: Matt Williams <m@technovangelist.com> * Correcting to fit in 0.1.15 changes Signed-off-by: Matt Williams <m@technovangelist.com> * Update README.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * addressing comments Signed-off-by: Matt Williams <m@technovangelist.com> * more api cleanup Signed-off-by: Matt Williams <m@technovangelist.com> * its llava not llama Signed-off-by: Matt Williams <m@technovangelist.com> * Update docs/troubleshooting.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Updated hosting to server and documented all env vars Signed-off-by: Matt Williams <m@technovangelist.com> * remove last of the cli descriptions Signed-off-by: Matt Williams <m@technovangelist.com> * Update README.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * update further per conversation with jeff earlier today Signed-off-by: Matt Williams <m@technovangelist.com> * cleanup the doc readme Signed-off-by: Matt Williams <m@technovangelist.com> * move upgrade to faq Signed-off-by: Matt Williams <m@technovangelist.com> * first change Signed-off-by: Matt Williams <m@technovangelist.com> * updated Signed-off-by: Matt Williams <m@technovangelist.com> * Update docs/faq.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Update docs/api.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Update docs/api.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Update docs/api.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Update docs/api.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Update docs/api.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Update docs/api.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Update docs/README.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Update docs/api.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Update docs/api.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Update docs/api.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Update README.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Update docs/README.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Update docs/api.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Update docs/api.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Update docs/api.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Update docs/README.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Update docs/README.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Update docs/README.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * examples in parent Signed-off-by: Matt Williams <m@technovangelist.com> * add exapmle for create model. Signed-off-by: Matt Williams <m@technovangelist.com> * update faq Signed-off-by: Matt Williams <m@technovangelist.com> * update create model api Signed-off-by: Matt Williams <m@technovangelist.com> * Update docs/api.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Update docs/faq.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Update docs/troubleshooting.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * update the readme in docs Signed-off-by: Matt Williams <m@technovangelist.com> * update a few more things Signed-off-by: Matt Williams <m@technovangelist.com> * Update docs/troubleshooting.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Update docs/faq.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Update README.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Update docs/modelfile.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> * Update docs/troubleshooting.md Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com> --------- Signed-off-by: Matt Williams <m@technovangelist.com> Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com>
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- the **`Modelfile` is not case sensitive**. In the examples, uppercase instructions are used to make it easier to distinguish it from arguments.
- Instructions can be in any order. In the examples, the `FROM` instruction is first to keep it easily readable.
[1]: https://ollama.com/library