# GPT-4o release date

entity: /record/gpt-4o.md  
predicate: model_release  
page: /record/gpt-4o/model_release  
as_of: 2026-11-04  

As of November 4, 2026, the AsOf record says GPT-4o was released on May 13, 2024, from a primary source (developers.openai.com). The record holds 1 claim on GPT-4o's release, 1 still open and 0 superseded, each dated and sourced; a replaced value is closed with an end date, never deleted.

## Current release date

What the record asserts on 2026-11-04.

- [GPT-4o](/record/gpt-4o.md) | model_release | GPT-4o | valid 2024-05-13 to present | conf 0.95 | valid | [clm_842D6855DED0](/claim/clm_842D6855DED0.md)
  sources: https://developers.openai.com/api/docs/changelog#2024-05-13

## Every dated value

One claim per line, oldest first. Superseded claims stay visible.

- [GPT-4o](/record/gpt-4o.md) | model_release | GPT-4o | valid 2024-05-13 to present | conf 0.95 | valid | [clm_842D6855DED0](/claim/clm_842D6855DED0.md)
  sources: https://developers.openai.com/api/docs/changelog#2024-05-13

## Questions this record answers

### When was GPT-4o released?

On May 13, 2024, from a primary source (developers.openai.com) (status valid, confidence 0.95).


## Get this data

- JSON: /v1/entities/gpt-4o/model_release (this fact) · /v1/entities/gpt-4o?predicates=model_release (with the entity's coverage; add as_of=YYYY-MM-DD for a date)
- MCP: timeline(entity: "gpt-4o", predicates: ["model_release"]) for every dated value · fetch(id: "/record/gpt-4o/model_release.md") for this page
- Entity twin: /record/gpt-4o.md · timeline: /timelines/gpt-4o.md

---

AsOf is a temporal fact ledger: a structured, dated, sourced record of what is true and what changed, built for AI retrieval.