OpenAI has announced the release of fine-tuning capabilities for its GPT-4o model, providing one million free training tokens per day for every organization until September 23. In addition, OpenAI revealed the pricing details for its new o1-preview and o1-mini models. The o1-preview model is priced at $15 per million input tokens and $60 per million output tokens, making it significantly more expensive than GPT-4o. The o1-mini model is priced at $3 per million input tokens and $12 per million output tokens. The new pricing structure, which includes hidden 'reasoning tokens' at a 4:1 ratio, makes the o1-preview model approximately 8 times more expensive compared to GPT-4o. The context window for the o1 model is 128k tokens with a maximum output of 32,768 tokens. The o1-preview model is also 6 times the cost of GPT-4o, while the o1-mini model is about 20 times more expensive than GPT-4o-mini. The o1 output token pricing matches the original GPT-3 pricing.