OpenTofu and Terraform Version Compatibility Table

Supported OpenTofu Versions

The officially supported versions are:

OpenTofu Version	Terragrunt Version
1.11.x	>= 0.95.0
1.10.x	>= 0.82.0
1.9.x	>= 0.72.0
1.8.x	>= 0.66.0
1.7.x	>= 0.58.0
1.6.x	>= 0.52.0

Supported Terraform Versions

The officially supported versions are:

Terraform Version	Terragrunt Version
1.14.x	>= 0.94.0
1.13.x	>= 0.86.0
1.12.x	>= 0.80.0
1.11.x	>= 0.75.0
1.10.x	>= 0.74.0
1.9.x	>= 0.60.0
1.8.x	>= 0.57.0
1.7.x	>= 0.56.0
1.6.x	>= 0.53.0
1.5.x	>= 0.48.0
1.4.x	>= 0.45.0
1.3.x	>= 0.40.0
1.2.x	>= 0.38.0
1.1.x	>= 0.36.0
1.0.x	>= 0.31.0
0.15.x	>= 0.29.0
0.14.x	>= 0.27.0
0.13.x	>= 0.25.0
0.12.x	0.19.0 - 0.24.4
0.11.x	0.14.0 - 0.18.7

Note 1: Terragrunt lists support for BSL versions of Terraform (>= 1.6.x) and core IaC functionality will work as expected. However, support for BSL Terraform-specific features is not guaranteed even if that version is in this table.

Note 2: This table lists versions that are officially tested in the CI process. In practice, the version compatibility is more relaxed than documented above. For example, we’ve found that Terraform 0.13 works with any version above 0.19.0, and we’ve also found that terraform 0.11 works with any version above 0.19.18 as well.

If you wish to use Terragrunt against an untested Terraform version, you can use the terraform_version_constraint (introduced in Terragrunt v0.19.18) attribute to relax the version constraint.

Compatibility API

Version compatibility data is available via JSON API:

Endpoint	Description
`/api/v1/compatibility`	All entries
`/api/v1/compatibility?tool=opentofu`	OpenTofu only
`/api/v1/compatibility?tool=terraform`	Terraform only

Example:

curl https://terragrunt.gruntwork.io/api/v1/compatibility?tool=opentofu

Response format:

[
  {
    "tool": "opentofu",
    "version": "1.11.x",
    "terragrunt_min": "0.95.0",
    "terragrunt_max": null
  }
]

Field	Description
`tool`	IaC tool name: `opentofu` or `terraform`
`version`	Tool version pattern (e.g., `1.11.x`)
`terragrunt_min`	Minimum compatible Terragrunt version
`terragrunt_max`	Maximum compatible version, or `null` for open-ended support