When it launched in July 2024, GPT-4o mini was the first model to outperform GPT-4 on LMSYS chat preference while costing less than GPT-3.5 Turbo, a roughly 100x cost reduction versus GPT-4 at comparable quality. It scores 82.0% on MMLU with 128K context and supports text and image input, function calling, and JSON mode at $0.15/$0.60 per million tokens.
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GPT-4o is the full multimodal model with maximum capability, while GPT-4o mini is a smaller, faster variant optimized for cost-efficient production tasks. GPT-4o mini scores 82% on MMLU while costing a fraction of GPT-4o.
GPT-4o mini is available in ChatGPT's free tier with usage limits. Through the API, it requires a paid account with pricing at $0.15 per million input tokens, accessible through .
GPT-4o mini scores 82.0% on MMLU (5-shot), surpassing GPT-3.5 Turbo (70.0%) by 12 points and approaching GPT-4 (86.4%) territory at less than 1% the cost. On LMSYS chat preference it outperforms GPT-4 despite the 4-point MMLU gap, suggesting stronger conversational quality than raw knowledge scores indicate. It is the highest quality-per-dollar model on the sheet.
Running GPT-4o mini through Telnyx Inference costs $0.15 per million input tokens and $0.60 per million output tokens. Processing 10,000,000 classification tasks at 500 tokens each would cost approximately $3,750, more than 60% cheaper than GPT-3.5 Turbo and roughly 100x cheaper than GPT-4 at comparable chat quality.
GPT-4o is a natively multimodal model that processes text, images, and audio jointly, while GPT-4 is text-only (with separate vision capabilities). GPT-4o is also faster and cheaper than GPT-4, making it the recommended successor for most applications.
"4o mini" refers to the small, fast variant of GPT-4o (the "o" stands for "omni" indicating multimodal capability). It is ChatGPT's default model for everyday tasks where speed and cost efficiency are prioritized over maximum reasoning depth.
Yes, GPT-4o mini is the default free model in ChatGPT. It is also available through the API at $0.15 per million input tokens, making it one of OpenAI's most affordable options.
GPT-4.1 mini currently offers the strongest performance among OpenAI's mini models, followed by GPT-4o mini and GPT-5 mini. The best choice depends on your task: GPT-4.1 mini leads on structured output, while GPT-5 mini is stronger on reasoning.
GPT-4o mini is priced at $0.15 per million input tokens and $0.60 per million output tokens through the API. Infrastructure providers offer access with additional benefits like co-located inference for lower latency.
