ollama/docs/modelfile.md

Ollama Model File Reference

Ollama can build models automatically by reading the instructions from a Modelfile. A Modelfile is a text document that represents the complete configuration of the Model. You can see that a Modelfile is very similar to a Dockerfile.

Format

Here is the format of the Modelfile:

# comment
INSTRUCTION arguments

Nothing in the file is case-sensitive. However, the convention is for instructions to be uppercase to make it easier to distinguish from the arguments.

A Modelfile can include instructions in any order. But the convention is to start the Modelfile with the FROM instruction.

Although the example above shows a comment starting with a hash character, any instruction that is not recognized is seen as a comment.

FROM

FROM <image>[:<tag>]

This defines the base model to be used. An image can be a known image on the Ollama Hub, or a fully-qualified path to a model file on your system

PARAMETER

The PARAMETER instruction defines a parameter that can be set when the model is run.

PARAMETER <parameter> <parametervalue>

Valid Parameters and Values

Parameter	Description	Value Type	Value Range
NumCtx		int
NumGPU		int
MainGPU		int
LowVRAM		bool
F16KV		bool
LogitsAll		bool
VocabOnly		bool
UseMMap		bool
EmbeddingOnly		bool
RepeatLastN		int
RepeatPenalty		float
FrequencyPenalty		float
PresencePenalty		float
temperature	The temperature of the model. Higher temperatures result in more creativity in the response	float	0 - 1
TopK		int
TopP		float
TFSZ		float
TypicalP		float
Mirostat		int
MirostatTau		float
MirostatEta		float
NumThread		int

PROMPT

Prompt is a multiline instruction that defines the prompt to be used when the model is run. Typically there are 3-4 components to a prompt: System, context, user, and response.

PROMPT """
{{- if not .Context }}
### System:
You are a content marketer who needs to come up with a short but succinct tweet. Make sure to include the appropriate hashtags and links. Sometimes when appropriate, describe a meme that can be includes as well. All answers should be in the form of a tweet which has a max size of 280 characters. Every instruction will be the topic to create a tweet about.
{{- end }}
### Instruction:
{{ .Prompt }}

### Response:
"""