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Articles about Tokens: setup guides, comparisons and fixes.
DeepSeek swapped the model behind deepseek-flash on 17 October: same name, same price, new release. What changed, what to check in your code, and where DeepSeek-V4-Flash 0731 fits.
Official DeepSeek API prices, peak hours and cache discounts, two monthly cost examples and when a fixed price wins.
Tokens are the pieces of text a model reads, writes and bills you for. A real tokenizer example, rules of thumb and a cost calculation.
Why agent bills are mostly input tokens, a formula to estimate a task and ways to spend less.