GPT-5.5 leaves ChatGPT/Work/Codex Oct 14 - API stays, Copilot follows Oct 19

What happened

What happened (verified 2026-10-12 on learn.chatgpt.com/docs/models): On October 14, 2026 GPT-5.5 retires from ChatGPT, ChatGPT Work, and Codex on all plans (consumer, Business, Enterprise, Edu). OpenAI's explicit carve-out: this retirement does not apply to the OpenAI API; the model card still says GPT-5.5 remains available on the API. For Codex with ChatGPT sign-in, paid plans are pointed to GPT-6 Sol (gpt-6-sol) when available; Free/Go to GPT-6 Luna (gpt-6-luna) in the desktop app when available. Update workspace defaults, saved settings, custom agents, scheduled tasks, and scripts that still select gpt-5.5. Separately, GitHub Changelog 2026-09-18 drops GPT-5.5 from Copilot on October 19, 2026 (suggested alternative GPT-5.6 Sol). Tool impact: pinned Codex/Work agents break on the 14th while API-only callers feel nothing; Copilot pins have five more days but Pro may not get Sol.

Tool impact

chatgpt github-copilot cursor

Switch or not?

Try: if you pin gpt-5.5 in Codex (ChatGPT sign-in), Work defaults, custom agents, or scheduled tasks, switch before Oct 14 - paid to gpt-6-sol (or gpt-6.1-sol when that is your Sol), Free/Go desktop to gpt-6-luna when available. Search configs for the literal string gpt-5.5 this week. Avoid: treating this as an OpenAI API shutdown; assuming Sol/Luna appear in ChatGPT Chat (docs: Work and Codex only); waiting for Copilot's Oct 19 drop if your break is Codex/Work on the 14th. Next: (1) ChatGPT/Codex pins by Oct 14; (2) Copilot GPT-5.5 → GPT-5.6 Sol by Oct 19 (Pro: verify Terra if Sol is unavailable); (3) Business/Enterprise Copilot admins confirm model policy enables the replacement; (4) re-verify learn.chatgpt.com/docs/models and the GitHub 2026-09-18 changelog on ship day. last-verified 2026-10-12.

Money / risk

Two clocks: ChatGPT/Work/Codex Oct 14 vs Copilot Oct 19 - miss the earlier one and agents/scripts fail while API users feel nothing. Replacement availability is plan + client gated. Copilot Pro may not get GPT-5.6 Sol (family launch put Sol on Pro+/Max/Business/Enterprise) - verify Terra/Luna instead of blindly following the Sol row. API carve-out is real today; watch API deprecations separately.

Sources (multi-channel)

GitHub, docs, blogs, video — not a single-platform dump.

docs OpenAI Models - GPT-5.5 retirement Oct 14 + API carve-out
Verified 2026-10-12: retires ChatGPT/Work/Codex all plans Oct 14; does not apply to OpenAI API; Codex ChatGPT-sign-in replacements gpt-6-sol (paid) / gpt-6-luna (Free/Go desktop) when available.
docs GitHub Changelog - Copilot GPT-5.5 deprecation Oct 19 → GPT-5.6 Sol
Verified 2026-10-12: GPT-5.5 deprecated across Copilot experiences Oct 19 2026; suggested alternative GPT-5.6 Sol; Business/Enterprise default enablement caveat for admins.
docs OpenAI API - GPT-5.5 model card still listed
API model card still present; supports the product-vs-API carve-out. Not an API EOL notice.

Source

OpenAI - Models (GPT-5.5 retires ChatGPT/Work/Codex Oct 14; API carve-out) · verify independently