Migrating from gpt-4o-mini-tts to gpt-realtime-2.1-mini
What changes when you move from gpt-4o-mini-tts to gpt-realtime-2.1-mini: input price 0%, output price −80%.
- From
- gpt-4o-mini-tts
- Status
- Deprecated
- Shutdown
- Jan 6, 2027
- Time left
- 74 days
- Status
- Active
- Shutdown
- none announced
- Time left
- —
Prices
USD per 1M tokens, standard tier| Type | gpt-4o-mini-tts | gpt-realtime-2.1-mini | Change |
|---|---|---|---|
| Input | $0.60first seen October 1, 2026 · source | $0.60first seen October 1, 2026 · source | 0% |
| Cached input | Not published | $0.06first seen October 1, 2026 · source | — |
| Output | $12.00first seen October 1, 2026 · source | $2.40first seen October 1, 2026 · source | −80% |
At 1M input and 250K output tokens a month: $3.60 on gpt-4o-mini-tts, $1.20 on gpt-realtime-2.1-mini (−66.7%).
Other tiers, prompt-size bands and modalities are on each model's page.
Limits
Tokens| Limit | gpt-4o-mini-tts | gpt-realtime-2.1-mini | Change |
|---|---|---|---|
| Context window | Not published | 128,000 tokensin place when tracking began (October 7, 2026) · source | — |
| Max output tokens | Not published | 32,000 tokensin place when tracking began (October 7, 2026) · source | — |
Features and parameters
Compare modelsSame on both
- Batch API: not supported on both.gpt-4o-mini-tts: in place when tracking began (October 6, 2026) · source · gpt-realtime-2.1-mini: in place when tracking began (October 7, 2026) · source
- Fine-tuning: not supported on both.gpt-4o-mini-tts: in place when tracking began (October 6, 2026) · source · gpt-realtime-2.1-mini: in place when tracking began (October 7, 2026) · source
Not published for gpt-4o-mini-tts: Structured outputs, Function calling, Prompt caching, Image input, PDF input, Reasoning / thinking, Built-in web search, temperature parameter, top_p parameter, logprobs, Context window, Max output tokens.
Not published for gpt-realtime-2.1-mini: Structured outputs, Image input, PDF input, 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-4o-mini-tts | Microsoft Foundryversion 2025-03-20 | gpt-4o-mini-tts | Oct 15, 2026Retired on October 15, 2026 | |
| gpt-4o-mini-tts | Microsoft Foundryversion 2025-12-15 | gpt-4o-mini-tts | Jun 15, 2027Active | 234 days |
| gpt-realtime-2.1-mini | Microsoft Foundryversion 2026-07-07 | gpt-realtime-2.1-mini | Jun 25, 2027Active | 244 days |
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
gpt-4o-mini-ttstogpt-realtime-2.1-mini.
Time until shutdown
gpt-4o-mini-ttsCounting to 7:00 pm ET on January 5, 2027, which is 00:00 UTC on January 6, 2027.
Compared from AIWire's published data when this page loaded. Each fact links to the page it came from. Model pages: gpt-4o-mini-tts, gpt-realtime-2.1-mini.