This model is over 2 years old. A newer version of it has since shipped: GPT-5.6-Cyber (2026-08-10). The details below are still accurate for this model — it just is not what we would recommend today.
GPT-4o
Version History
GPT-4o December snapshot with improved real-time audio mode quality and enhanced JSON schema structured output compliance.
GPT-4o October snapshot with vision improvements and better performance on document understanding tasks.
GPT-4o August 2025 snapshot with improved structured output reliability and expanded multilingual performance.
November snapshot with improved instruction following and reduced verbosity.
GPT-4o August snapshot adds structured outputs (JSON Schema) and improved function calling accuracy.
OpenAI released GPT-4o, a multimodal model delivering 2x faster inference than GPT-4 Turbo at 50% lower cost with 128K context window and improved non-English language capabilities.