GPT-4o mini TTS
Speech and audio
gpt-4o-mini-tts
$0.60 text in, $12 audio out per 1M tokens
GPT-4o
Model idgpt-4o
Price$2.50 in, $10 out per 1M tokens
Checked15 October 2026
Knows up to October 2023
2,086events after its cutoff
98 historic, 504 major. 1,109 days of news.
It launched on 13 May 2024, already missing 19 of them. Coverage before 2026 is thin (24 entries for 2023, 34 for 2024 and 80 for 2025), so this count is a floor.
Its cutoff, October 2023, is before this chart starts: every mark here is news it has never seen.
How to call it
3 ways to use GPT-4o, with the model id each provider expects.
| Provider | Model id | Endpoint | Docs |
|---|---|---|---|
| OpenAI API | gpt-4o |
https://api.openai.com/v1/chat/completions |
developers.openai.com |
| Azure OpenAI (Microsoft Foundry) | gpt-4o |
learn.microsoft.com | |
| OpenRouter | openai/gpt-4o |
openrouter.ai |
Pricing
| Input | $2.50 per 1M tokens |
|---|---|
| Cached input | $1.25 per 1M tokens |
| Output | $10 per 1M tokens |
As published: “per 1M tokens (USD), standard tier”.
Source: developers.openai.com, checked 15 October 2026.
Specs
- Input
- Text and images
- Output
- Text
- Context window
- 128,000 tokens
- Max output
- 16,384 tokens
- Open weights
- No
- Licence
- Proprietary
- Training cutoff
- October 2023
- Released
- 13 May 2024
- Status
- Deprecated
- Type
- Multimodal model
What stands out
What its maker marketed at launch, and what people found later, each with its source.
Omni model
Natively multimodal “o” model; basis of the gpt-4o audio/realtime/transcribe/TTS variants.
Fine-tunable
Supports fine-tuning via v1/fine-tuning.
Four assistants, one scale
GPT-4o is added as a fifth row. Each row runs from what the model knows (graphite) through the months between its cutoff and its launch (hatched) to today (pink).
- GPT-6 Astra 271 at launch, 1,863 today
- Claude Opus 5.5 372 at launch, 1,795 today
- Gemini 4 Hydrogen 1,863 at launch, 1,889 today
- Grok 4.7 387 at launch, 1,829 today
- GPT-4o 19 at launch, 2,086 today
Show as a table
| Model | Cutoff | Released | Missing at launch | Missing today |
|---|---|---|---|---|
| GPT-6 Astra | April 2026 | 3 September 2026 | 271 | 1,863 |
| Claude Opus 5.5 | June 2026 | 22 September 2026 | 372 | 1,795 |
| Gemini 4 Hydrogen | March 2026 | 12 November 2026 | 1,863 | 1,889 |
| Grok 4.7 | May 2026 | 21 September 2026 | 387 | 1,829 |
| GPT-4o | October 2023 | 13 May 2024 | 19 | 2,086 |
Notes
Snapshots gpt-4o-2024-11-20, -2024-08-06, -2024-05-13 (the last deprecated, shutdown Oct 23 2026). chatgpt-4o-latest shut down Feb 17 2026. On 2026-10-14 OpenAI deprecated gpt-4o-2024-08-06, gpt-4o-2024-11-20 and gpt-4o-mini-2024-07-18 (shutdown Jan 14 2027, replacement gpt-6-luna; fine-tunes follow their base model). gpt-4o-mini was $0.15/$0.60.
curl https://api.openai.com/v1/responses \
-H "Authorization: Bearer $OPENAI_API_KEY" -H "Content-Type: application/json" \
-d '{"model":"gpt-4o","input":"Hello"}'
Sources: