gpt-realtime-1.5 by OpenAI vs AssemblyAI: Which Should You Choose in 2026?
Choosing between gpt-realtime-1.5 by OpenAI and AssemblyAI comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
By Toolradar Team · Last updated February 28, 2026 · Methodology
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
gpt-realtime-1.5 by OpenAI
Enable low-latency, multimodal AI interactions for voice agents and real-time audio transcription.
Best for you if:
- • Enables low-latency speech-to-speech and multimodal AI interactions.
- • Supports building voice agents in browsers, server-side, and VoIP telephony.
AssemblyAI
Speech-to-text API with high accuracy transcription
Best for you if:
- • You want the higher-rated option (8.6/10 vs 0.0/10)
- • AssemblyAI provides AI models for speech-to-text, speaker detection, and audio intelligence
- • It transcribes audio with high accuracy and extracts insights like sentiment and topics
| At a Glance |  gpt-realtime-1.5 by OpenAI |  AssemblyAI |
|---|---|---|
Price | Paid | Paid |
Best For | Transcription | Transcription |
Rating | —/100 | 86/100 |
| Feature | gpt-realtime-1.5 by OpenAI | AssemblyAI |
|---|---|---|
| Pricing Model | Paid | Paid |
| Editorial Score | — | 86 |
| Community Rating | No ratings yet | No ratings yet |
| Total Reviews | 0 | 0 |
| Community Upvotes | 147 | 0 |
| Categories | TranscriptionAI Voice | TranscriptionAPI Tools |
How gpt-realtime-1.5 by OpenAI and AssemblyAI Compare
gpt-realtime-1.5 by OpenAI
Enable low-latency, multimodal AI interactions for voice agents and real-time audio transcription.
Paid
AssemblyAI
Speech-to-text API with high accuracy transcription
Paid · 86/100 score
Who Should Use What?
On a budget?
Both are paid. Compare plans on their websites.
Go with: AssemblyAI
Want the highest-rated option?
AssemblyAI scores 86/100. gpt-realtime-1.5 by OpenAI is unrated.
Go with: AssemblyAI
Value user reviews?
Neither has user reviews yet.
Go with: AssemblyAI
3 Questions to Help You Decide
What's your budget?
Both are paid. Pricing won't help you decide here.
What's your use case?
Both are transcription tools. Compare their specific features to decide.
How important are ratings?
Not all tools have been rated yet.
Key Takeaways
AssemblyAI
- Higher score: 86/100 vs unrated
- Our pick for this comparison
gpt-realtime-1.5 by OpenAI
- More community upvotes (147)
The Bottom Line
AssemblyAI (86/100) is our pick.
Frequently Asked Questions
Is gpt-realtime-1.5 by OpenAI or AssemblyAI better?
AssemblyAI scores 86/100 in our evaluation. Both are paid.
What are gpt-realtime-1.5 by OpenAI and AssemblyAI used for?
gpt-realtime-1.5 by OpenAI: Enable low-latency, multimodal AI interactions for voice agents and real-time audio transcription.. AssemblyAI: Speech-to-text API with high accuracy transcription.
What does gpt-realtime-1.5 by OpenAI cost vs AssemblyAI?
gpt-realtime-1.5 by OpenAI is a paid tool. AssemblyAI is a paid tool. Visit their websites for detailed pricing.