(l-onnx-doc-MatMul)=

# MatMul


(l-onnx-op-matmul-13)=

## MatMul - 13

### Version

- **name**: [MatMul (GitHub)](https://github.com/onnx/onnx/blob/main/docs/Operators.md#MatMul)
- **domain**: `main`
- **since_version**: `13`
- **function**: `False`
- **support_level**: `SupportType.COMMON`
- **shape inference**: `True`

This version of the operator has been available
**since version 13**.

### Summary

Matrix product that behaves like [numpy.matmul](https://numpy.org/doc/stable/reference/generated/numpy.matmul.html).

### Inputs

- **A** (heterogeneous) - **T**:

  N-dimensional matrix A
- **B** (heterogeneous) - **T**:

  N-dimensional matrix B

### Outputs

- **Y** (heterogeneous) - **T**:

  Matrix multiply results from A * B

### Type Constraints

* **T** in ( `tensor(bfloat16)`, `tensor(double)`, `tensor(float)`, `tensor(float16)`, `tensor(int32)`, `tensor(int64)`, `tensor(uint32)`, `tensor(uint64)` ):

  Constrain input and output types to float/int tensors.

```{toctree}
text_diff_MatMul_9_13
```

(l-onnx-op-matmul-9)=

## MatMul - 9

### Version

- **name**: [MatMul (GitHub)](https://github.com/onnx/onnx/blob/main/docs/Operators.md#MatMul)
- **domain**: `main`
- **since_version**: `9`
- **function**: `False`
- **support_level**: `SupportType.COMMON`
- **shape inference**: `True`

This version of the operator has been available
**since version 9**.

### Summary

Matrix product that behaves like [numpy.matmul](https://numpy.org/doc/stable/reference/generated/numpy.matmul.html).

### Inputs

- **A** (heterogeneous) - **T**:

  N-dimensional matrix A
- **B** (heterogeneous) - **T**:

  N-dimensional matrix B

### Outputs

- **Y** (heterogeneous) - **T**:

  Matrix multiply results from A * B

### Type Constraints

* **T** in ( `tensor(double)`, `tensor(float)`, `tensor(float16)`, `tensor(int32)`, `tensor(int64)`, `tensor(uint32)`, `tensor(uint64)` ):

  Constrain input and output types to float/int tensors.

```{toctree}
text_diff_MatMul_1_13
text_diff_MatMul_1_9
```

(l-onnx-op-matmul-1)=

## MatMul - 1

### Version

- **name**: [MatMul (GitHub)](https://github.com/onnx/onnx/blob/main/docs/Operators.md#MatMul)
- **domain**: `main`
- **since_version**: `1`
- **function**: `False`
- **support_level**: `SupportType.COMMON`
- **shape inference**: `True`

This version of the operator has been available
**since version 1**.

### Summary

Matrix product that behaves like [numpy.matmul](https://numpy.org/doc/stable/reference/generated/numpy.matmul.html).

### Inputs

- **A** (heterogeneous) - **T**:

  N-dimensional matrix A
- **B** (heterogeneous) - **T**:

  N-dimensional matrix B

### Outputs

- **Y** (heterogeneous) - **T**:

  Matrix multiply results from A * B

### Type Constraints

* **T** in ( `tensor(double)`, `tensor(float)`, `tensor(float16)` ):

  Constrain input and output types to float tensors.