Migrating from chatgpt-4o-latest to gpt-5.1-chat-latest
What changes when you move from chatgpt-4o-latest to gpt-5.1-chat-latest: prices, limits, features and parameters, read from each company's own pages.
- Status
- Retired
- Shutdown
- Feb 17, 2026
- Time left
- —
- Status
- Retired
- Shutdown
- Jul 23, 2026
- Time left
- —
gpt-5.1-chat-latest is itself retired. Its replacement is gpt-5.6-sol.
Prices
USD per 1M tokens, standard tierNeither model has published per-token prices.
Limits
Tokens| Limit | chatgpt-4o-latest | gpt-5.1-chat-latest | Change |
|---|---|---|---|
| Context window | 128,000 tokensin place when tracking began (October 6, 2026) · source | 128,000 tokensin place when tracking began (October 6, 2026) · source | 0% |
| Max output tokens | 16,384 tokensin place when tracking began (October 6, 2026) · source | 16,384 tokensin place when tracking began (October 6, 2026) · source | 0% |
Features and parameters
Compare modelsSame on both
- Batch API: not supported on both.chatgpt-4o-latest: in place when tracking began (October 6, 2026) · source · gpt-5.1-chat-latest: in place when tracking began (October 6, 2026) · source
- Image input: supported on both.chatgpt-4o-latest: in place when tracking began (October 6, 2026) · source · gpt-5.1-chat-latest: in place when tracking began (October 6, 2026) · source
- Fine-tuning: not supported on both.chatgpt-4o-latest: in place when tracking began (October 6, 2026) · source · gpt-5.1-chat-latest: in place when tracking began (October 6, 2026) · source
Not published for chatgpt-4o-latest: Structured outputs, Function calling, Prompt caching, PDF input, Reasoning / thinking, Built-in web search, temperature parameter, top_p parameter, logprobs.
Not published for gpt-5.1-chat-latest: Prompt caching, PDF input, Reasoning / thinking, Built-in web search, temperature parameter, top_p parameter, logprobs.
Aliases
All aliasesNo aliases point at either model.
On cloud platforms
All platform dates| Model | Platform | Platform ID | Shutdown | Time left |
|---|---|---|---|---|
| gpt-5.1-chat-latest | Microsoft Foundryversion 2025-11-13 | gpt-5.1-chat | Jun 29, 2026Retired on June 29, 2026 |
Read daily from each platform's own pages. The status above uses each company's own date. Time left counts to 00:00 UTC on the shutdown date, which is the evening before in ET.
Checklist
- Change the model string from
chatgpt-4o-latesttogpt-5.1-chat-latest.
Compared from AIWire's published data when this page loaded. Each fact links to the page it came from. Model pages: chatgpt-4o-latest, gpt-5.1-chat-latest.