The latest Graph API version is:
These logs document versioned changes to the Graph API and Marketing API, and any products or services that rely on them. You can use the API Upgrade Tool to determine which version changes will affect your API calls.
Breaking changes are not listed here, but in our Breaking Changes log instead. Breaking changes are any changes that affect all API versions immediately. Although breaking changes can be released at any time (meaning they are not tied to specific release versions), they are rarely introduced.