Vigia

OpenAI API Models gpt-5.1 end of life (EOL) date and support status

Security fixes only Receives fixes until 2027-04-01 (in 175 days)

OpenAI API Models gpt-5.1 only receives security fixes until 2027-04-01; plan an upgrade to gpt-6.1-sol.

ProductOpenAI API Models
Version cyclegpt-5.1
StatusSecurity fixes only
Released2025-11-12
Active support until2026-10-01
End of life2027-04-01
Latest version—
Last verified2026-10-08

All OpenAI API Models versions → · Source: endoflife.date

Frequently asked questions

Is OpenAI API Models gpt-5.1 end of life?

Not yet, but active support has ended: OpenAI API Models gpt-5.1 only receives security fixes until 2027-04-01.

When does OpenAI API Models gpt-5.1 reach end of life?

OpenAI API Models gpt-5.1 reaches end of life on 2027-04-01.

When was OpenAI API Models gpt-5.1 released?

OpenAI API Models gpt-5.1 was first released on 2025-11-12.

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/openai-api-models/gpt-5.1