The "o" stands for omni: unlike GPT-4V which routed vision through a separate encoder, GPT-4o processes text, images, and audio through a single end-to-end neural network. It responds to audio input in roughly 320ms on average, runs 2x faster than GPT-4 Turbo at half the cost, and was the first model to bring GPT-4-class intelligence to ChatGPT's free tier.
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GPT-4o is available in ChatGPT's free tier with usage limits. Paid subscribers get higher rate limits and priority access. API pricing is $2.50 per million input tokens through OpenAI and inference providers.
GPT-4o ("omni") is OpenAI's natively multimodal successor to GPT-4, processing text, images, and audio in a single model. It is faster, cheaper, and more capable than GPT-4 across most benchmarks.
GPT-4o scores 88.7% on MMLU (5-shot) and 90.2% on HumanEval, surpassing GPT-4 (86.4% MMLU, 67.0% HumanEval) on the same sheet across both knowledge and code benchmarks. It runs at 2x the speed of GPT-4 Turbo at 50% lower cost while adding native audio and image processing. On multilingual tasks it significantly outperforms GPT-4 Turbo, particularly on Arabic, Hindi, and Mandarin.
Running GPT-4o through Telnyx Inference costs $2.50 per million input tokens and $10.00 per million output tokens. Processing 1,000,000 multimodal interactions at 1,500 tokens each would cost approximately $9,375, half the price of GPT-4 Turbo ($30,000) with faster speed and native audio/image support.
Yes, GPT-4o remains available in both ChatGPT and the API. It continues to be one of OpenAI's primary models alongside newer releases like GPT-4.1 and GPT-5, accessible through multiple inference platforms.
GPT-4o is accessible through ChatGPT (free and paid tiers), the OpenAI API, and third-party inference providers. API access requires an OpenAI account with billing configured.
GPT-4o excels at multimodal tasks combining text, vision, and audio understanding, making it particularly strong for real-time voice applications and document analysis. It also performs well on coding, reasoning, and creative writing tasks.
GPT-4o is priced at $2.50 per million input tokens and $10 per million output tokens through the API. This is significantly cheaper than the original GPT-4 while delivering better performance across most benchmarks.
GPT-4o outperforms GPT-4 on most benchmarks while being faster and approximately 50% cheaper. Its native multimodal capabilities for vision and audio processing represent a significant upgrade over GPT-4's text-first architecture.
