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How does the input and output token pricing model work for modern generative AI APIs, and why do long conversations get progressively more expensive?

ChatGPTgpt-61 query10/31/2026
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How does the input and output token pricing model work for modern generative AI APIs, and why do long conversations get progressively more expensive?
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official API pricing documentation input output tokens cached input tokens OpenAI Anthropic Google GeminiGoogle ↗
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ChatGPT1 real searches · gpt-6
official API pricing documentation input output tokens cached input tokens OpenAI Anthropic Google Gemini Google ↗

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official API pricing documentation input output tokens cached input tokens OpenAI Anthropic Google Gemini
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