OpenAI.fm AI Tool – Complete Details
🧠 What is OpenAI.fm?
OpenAI.fm is a live, browser-based demo created by OpenAI to showcase its latest Text-to-Speech (TTS) technology. It uses the advanced gpt-4o-mini-tts model to convert written text into human-like speech in real time. This tool is designed for:
Developers
Content creatorsEducators
Businesses needing voice-based applications
You can access it directly at www.openai.fm.
🎯 Key Features
| Feature | Description |
|---|---|
| Model Used | gpt-4o-mini-tts |
| Audio Quality | 48 kHz, realistic human voices |
| Languages Supported | 50+ (Best performance in English) |
| Customization | Natural prompts for tone, emotion, accent |
| Voices Available | 11 preset voices (e.g. Alloy, Ash, Ballad, Echo, etc.) |
| Speech Speed | Low latency, instant generation |
| Download Options | MP3/WAV download available |
| API Access | Yes, via OpenAI’s API |
| Speech-to-Text Support | Includes improved models like gpt-4o-transcribe |
🔧 How to Use OpenAI.fm
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Visit the Website: Go to www.openai.fm
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Paste Your Text: Up to ~5,000 characters
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Select a Voice: Choose from 11 voice presets
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Customize: Use natural prompts (e.g., “angry teacher”, “sad robot”) to control style
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Play or Download: Listen instantly or save audio for later use
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For Developers: Use OpenAI’s TTS API to integrate this in your apps
💰 Pricing (API)
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Around $0.015 per minute of generated speech.
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Cost-effective for high-quality voice applications.
📢 Use Cases
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🎬 YouTube voiceovers
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🎓 E-learning content
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📱 App voice assistants
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🧑🦯 Accessibility for visually impaired users
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📖 Audiobooks and storytelling
📝 Community Feedback
✅ Positives:
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Very natural voice output
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Instant results
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Free to test on browser
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Easy to use and developer friendly
❌ Limitations:
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Some minor artifacts at beginning/end of clips
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English works best; some other languages are less natural
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Slightly less expressive than premium tools like ElevenLabs in certain contexts
📺 Demo Video
Check this demo:
🔗 OpenAI FM | New Text-to-Speech AI Voice Generator
📌 Summary Table
| Category | Details |
|---|---|
| Website | openai.fm |
| Voices | 11 pre-defined (Ash, Alloy, Echo, etc.) |
| Supported Text | Up to 5,000 characters |
| Audio Quality | 48kHz high fidelity |
| Language Support | 50+ languages |
| API Available | Yes |
| Cost | $0.015/min (via API) |
| Use | Personal, Educational, Commercial |
| Download Option | Yes (MP3/WAV) |