# GO AI Blog

> Hands-on guides and honest comparisons from the team behind [GO AI Chat](https://goaichat.app/chat) — the iOS app that ships GPT-5, Gemini, Grok 4, and DeepSeek in one place. We use these models all day, every day; these notes are what we learn.

## AI video generation

- [The Best AI Video Generator Apps for iPhone in 2026 — Tested](https://goaichat.app/blog/best-ai-video-generator-iphone): multi-model apps, provider apps, and social-first tools compared from daily use.
- [How to Generate an AI Video on iPhone in Under a Minute](https://goaichat.app/blog/how-to-make-ai-videos-on-iphone): from one-line description or photo to a shareable 15-second clip, with prompt patterns.
- [Generating Video with Grok: a Hands-On Guide](https://goaichat.app/blog/grok-video-generation): prompt structure, the 15-second ceiling, image-to-video, and the failure modes worth knowing.

## AI models, compared

- [Grok 4 vs GPT-5: We Use Both Every Day — Here's When Each Wins](https://goaichat.app/blog/grok-4-vs-gpt-5): qualitative, task-by-task comparison from daily side-by-side use — no invented benchmarks.
- [Which AI Model for Which Task? A Practical Cheat Sheet](https://goaichat.app/blog/which-ai-model-for-which-task): GPT-5 vs Gemini vs Grok 4 vs DeepSeek by task.
- [Why Pay for 4 AI Subscriptions? Multi-Model Apps Explained](https://goaichat.app/blog/all-ai-models-in-one-app): cost arithmetic, mid-thread switching, the feature-lag trade-off, and when going direct is still right.
- [GPT-5 vs Gemini: Strengths by Task](https://goaichat.app/blog/gpt-5-vs-gemini): GPT-5 for structure and instruction-following, Gemini for long documents — task by task, no invented benchmarks.

## Image generation

- [Imagen vs OpenAI vs Grok: Choosing an AI Image Model](https://goaichat.app/blog/imagen-4-vs-openai-vs-grok-images): which image family to reach for by job — photoreal, text-in-image, illustration, restyling.

## Guides & explainers

- [Custom System Prompts: Make Any Model Act Like Your Assistant](https://goaichat.app/blog/custom-system-prompts): anatomy of a good system prompt plus six copy-paste templates.
- [What Is MCP? Model Context Protocol in Plain English](https://goaichat.app/blog/what-is-mcp): the open standard that lets AI assistants use external tools, and how GO AI Chat's [MCP server](https://goaichat.app/mcp) uses it.

## Nutrition & calories

- [Can AI Count Calories from a Photo? How It Works and Where It's Wrong](https://goaichat.app/blog/ai-calorie-counting-photo): what photo estimation does, the four things that break it, and how to shoot a meal for a better answer.
- [Calorie Deficit, Explained Like a Human](https://goaichat.app/blog/calorie-deficit-explained): what a deficit is, how big it should be, why the scale lies, and why yours might look stalled.

## Plant care

- [How Plant ID by Photo Works — and When It Fails](https://goaichat.app/blog/plant-identification-by-photo): what identifiers match on, which photos help, and where confident answers still deserve checking.
- [Yellow Leaves: the Decision Tree (Water, Light, Roots, or Age)](https://goaichat.app/blog/yellow-leaves): which leaves, where, and how fast — the three questions that identify the cause.

## AI music

- [Describe a Song, Hear It Back: Text-to-Song in Practice](https://goaichat.app/blog/make-a-song-from-text): what the sentence must contain, which controls to leave on Auto, and how to iterate.

## Knowledge & research

- [What Is RAG? Source-Grounded AI Explained](https://goaichat.app/blog/what-is-rag): the four steps RAG runs, what grounding fixes, and where it still fails.

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