# ai-info

> Independent answers on AI models, tools, APIs and pricing — every figure traceable to its source, dated, and written so the short answer comes first.

## Pages

- [What Is MCP? Model Context Protocol Explained (2026)](https://ai-info.fastget.link/guides/what-is-mcp.html): MCP is an open protocol that lets AI apps call external tools and read external data. What it actually defines, the three things a server offers, and what changed in the July 2026 rewrite.
- [Call DeepSeek V4 in 3 Minutes with the OpenAI SDK](https://ai-info.fastget.link/deepseek/deepseek-v4-openai-sdk-3min.html): Port any OpenAI-SDK script to DeepSeek V4 in three minutes: two strings, a thinking mode that's on by default, and the model-ID trap most tutorials skip.
- [I Rewrote a Years-Old Java Blog with CodeBuddy and GLM-5.3-Flash](https://ai-info.fastget.link/ai-coding/codebuddy-blog-rewrite.html): A years-old Java blog rewritten in a weekend with CodeBuddy and GLM-5.3-Flash — Rust backend, hand-rolled HTML, no frameworks. What held up and what needed me.
- [DeepSeek V4 Flash vs Pro — What's Actually Different (and How to Choose)](https://ai-info.fastget.link/deepseek/flash-vs-pro.html): Flash and Pro share the same 1M context and features. Real differences: concurrency, price, build cadence — plus how to test which quality tier you need.
- [Cheapest DeepSeek V4 API — 4 Options Compared](https://ai-info.fastget.link/deepseek/cheapest-api-provider.html): DeepSeek V4 Flash costs $9–$77 a month depending on where you run it. We compared all four options — and why most price quotes you'll find are wrong.
- [DeepSeek Off-Peak Pricing Explained](https://ai-info.fastget.link/deepseek/off-peak-pricing.html): DeepSeek charges half price outside peak hours — peak is UTC 01:00–04:00 and 06:00–10:00, Mon–Fri. See those windows in your timezone and what it saves.
- [DeepSeek V4 API Cost Calculator](https://ai-info.fastget.link/deepseek/v4-api-cost-calculator.html): Compare what DeepSeek V4 costs per month across OpenRouter, Novita AI and the official DeepSeek API, using your own token volume.

## Notes

- Machine-readable index for AI crawlers. Full text is not bundled: fetch any URL above directly.