Langfa.st vs. MindVideo

Langfa.st

Langfa.st is a fast and minimal playground for testing and refining AI prompts. It supports over 50 large language models, including OpenAI, Anthropic, Mistral, Cohere, Google, and others — all available instantly without setup. You can insert variables, use Jinja2 templating, and compare outputs across models. There’s no need to sign up or bring your own API keys — it works out of the box. Langfa.st was built to eliminate the friction of existing tools: complicated UIs, required credentials, or overpriced subscriptions. It gives AI teams and prompt engineers a clean, disposable space to experiment, debug, and iterate — all in one tab. Free to use. You only pay if you need more volume or power features.

MindVideo

MindVideo is a powerful AI video generator that supports text to video and image to video functions. You can easily create wonderful video works here and experience Kiss, Hub, Morph and many other special effects to enhance creative performance. Based on popular models such as HaiLuo AI, Kling AI, Luma Ray and Seaweed, MindVideo makes video production easy and fun, and is completely free to use. Experience it now and unleash your creative potential!

Reviews

Reviews

Reviewed on 5/9/2025

Good AI tool!

Pros
ItemVotesUpvote
Works without login or API key1
Supports 50+ models out of the box1
Built-in support for variables and Jinja2 templating1
Instant response, no setup required1
Clean and distraction-free UI1
Cons
ItemVotesUpvote
No custom API key support (yet)1
Not ideal for running complex multi-turn chats1
Pros
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Cons
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