GPT-4o (Mar 2025)

Published

Mar 27, 2025

GPT-4o (Mar 2025) is an AI model developed by OpenAI (United States), first published in March 2025. It works in the multimodal, language, audio and 2 more domain, on tasks such as chat, image generation, audio generation and 6 more. It counts among the frontier models: the systems trained with the most compute of their moment.

Epoch AI has no training-compute estimate for this model.

Access: API access. Its weights are not openly released. It is built on top of GPT-4o (Jan 2025). Epoch AI rates the confidence of this record as speculative.

Full record

Organization: OpenAI
Country of organization: United States
Domain: Multimodal, Language, Audio, Speech, Vision
Task: Chat, Image generation, Audio generation, Vision-language generation, Table tasks, Language modeling/generation, Question answering, Speech recognition (ASR), Speech-to-text
Compute estimation method: Benchmarks
Model accessibility: API access
Open weights: No
Base model: GPT-4o (Jan 2025)
Epoch confidence: Speculative