Vigia

Qt 5.9 end of life (EOL) date and support status

End of life End of life since 2020-05-31 (2321 days ago)

Upgrade: Qt 5.9 no longer receives fixes. Supported cycles: 6.12.

ProductQt
Version cycle5.9
StatusEnd of life
Released2017-05-29
Active support until—
End of life2020-05-31
Latest version5.9.9 (2019-12-16)
Last verified2026-10-08

All Qt versions → · Source: endoflife.date

Frequently asked questions

Is Qt 5.9 end of life?

Yes. End of life since 2020-05-31 (2321 days ago). It no longer receives security or bug fixes.

When does Qt 5.9 reach end of life?

Qt 5.9 reached end of life on 2020-05-31.

When was Qt 5.9 released?

Qt 5.9 was first released on 2017-05-29.

What is the latest Qt 5.9 version?

The latest 5.9 release is 5.9.9, published on 2019-12-16.

Give your AI agent these facts

Vigia is a free MCP server: your coding agent checks versions, breaking changes and vulnerabilities before it writes code. No signup, no API key.

claude mcp add --transport http vigia https://vigia.coredls.cloud/mcp

Add to CursorAdd to VS Code★ Star on GitHub

Any other MCP client
{ "mcpServers": { "vigia": { "url": "https://vigia.coredls.cloud/mcp" } } }

Agent skill (SKILL.md): tells the agent when to use Vigia · GitHub Action for pull requests

For agents

GET https://vigia.coredls.cloud/v1/eol/qt/5.9