# GPT-4o

GPT-4o is a model from OpenAI, released on 13 May 2024. The context window is 128,000 tokens. The maximum output is 16,384 tokens. Pricing is $2.50 per million input tokens and $10.00 per million output tokens.

- Developer: OpenAI
- Id: gpt-4o
- Released: 2024-05-13T00:00:00.000Z
- Sighting: 2026-10-07T16:22:11.205Z
  - [evidence link](https://github.com/truefoundry/models/blob/main/providers/microsoft-foundry/gpt-4o.yaml)
- Status: Released
- API availability: 2024-05-13
  - [evidence link](https://developers.openai.com/api/docs/changelog)
- Product update: 2024-05-13
  - [evidence link](https://openai.com/index/gpt-4o-and-more-tools-to-chatgpt-free)
- Canonical: https://alexgetman.com/models/openai/gpt-4o/

## Questions

### What is the context window of GPT-4o?

The context window is 128,000 tokens. The maximum output is 16,384 tokens.

### How much does GPT-4o cost?

Pricing is $2.50 per million input tokens and $10.00 per million output tokens. Cached input is $1.25 per million.

### When was GPT-4o released?

On 13 May 2024.

## Timeline

**Confirmed use**
- 2026-11-14T02:21:52.804Z · [OpenAI · official articles · Introducing 4o Image Generation](https://openai.com/index/introducing-4o-image-generation)
**Confirmed use**
- 2026-11-14T03:46:10.496Z · [OpenAI · official articles · Introducing Verdi, an AI dev platform powered by GPT-4o](https://openai.com/index/mercado-libre)

## Evidence links

- [Artificial Analysis · benchmarks](https://artificialanalysis.ai/models)
- [openai-api-changelog](https://developers.openai.com/api/docs/changelog)
- [review](https://developers.openai.com/api/docs/models/gpt-4o)
- [openai-pricing](https://developers.openai.com/api/docs/pricing)
- [truefoundry-azure](https://github.com/truefoundry/models/blob/main/providers/microsoft-foundry/gpt-4o.yaml)
- [Azure Foundry · lifecycle](https://learn.microsoft.com/en-us/azure/foundry/concepts/model-lifecycle-retirement?view=azureml-api-2)
- [models.dev · catalogue](https://models.dev/#gpt-4o)
- [openai-news](https://openai.com/index/gpt-4o-and-more-tools-to-chatgpt-free)
- [OpenAI · official articles · Introducing 4o Image Generation](https://openai.com/index/introducing-4o-image-generation)
- [OpenAI · official articles · Introducing Verdi, an AI dev platform powered by GPT-4o](https://openai.com/index/mercado-libre)
- [OpenCode · discovery](https://opencode.ai/data/openai/gpt-4o)
- [Vercel AI Gateway](https://vercel.com/ai-gateway)

## Signals

- [GPT-4o: Provider API status update](https://alexgetman.com/signals/2026/09/24/gpt-4o/)