Using GPT-4 Turbo? It stops responding July 1 — migrate to GPT-4.1
- What happened
- OpenAI set a hard shutdown date for GPT-4 Turbo: all endpoints stop responding July 1, 2026.
- Why it matters
- Anything still pinning `gpt-4-turbo` — code or automation workflows — fails silently on that date.
- What to do
- Switch to GPT-4.1 now and convert legacy function-calling payloads to the tools format.
OpenAI has set a hard deprecation date for GPT-4 Turbo: all endpoints stop responding on July 1, 2026. Unlike previous soft deprecations, there is no extended sunset period for existing API keys.
For most chat and completion workloads, GPT-4.1 is a drop-in replacement — same request shape, comparable latency, lower per-token cost. The exception is function calling: GPT-4.1 rejects the legacy function_call parameter and requires the tools array format.
If you run automations through n8n, Make, or Zapier, check each OpenAI node — older workflow templates still pin gpt-4-turbo explicitly and will start failing silently on July 1.
What to do
- 1 Inventory every workflow and codebase reference pinning `gpt-4-turbo`
- 2 Switch model id to `gpt-4.1` and convert legacy `function_call` payloads to the `tools` format
- 3 Re-run critical automations once before the deadline — do not wait for July 1 failures
Affected tools & models
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