OpenAI Realtime API vs Thoughtly

as AI assistants see them, week of 2026-09-21

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OpenAI Realtime API edges out Thoughtly overall, with a score of 8 versus 6, and shows up more often too, at 9 of 60 answers compared to Thoughtly's 6 of 60. Head-to-head, OpenAI Realtime API was named more often in 6 questions, Thoughtly in 3, and they tied in 11. OpenAI Realtime API's strongest showing is on lowest latency, named in 2 of 3 answers, while Thoughtly's best spot is outbound sales calls, also 2 of 3. Both go unmentioned for call analytics and transcripts and for booking appointments questions vary between the two, with each also missing entirely from several other categories.

Head to head

metric	OpenAI Realtime API	Thoughtly
score	8	6
questions won	8	5

By assistant

OpenAI Realtime API

assistant	score	named in, this week	usual spot, this week
ChatGPT	3	5% of answers	#7.0
Claude	22	40% of answers	#6.5
Gemini	not sampled this week
Perplexity	0	0% of answers

Thoughtly

assistant	score	named in, this week	usual spot, this week
ChatGPT	0	0% of answers
Claude	3	5% of answers	#7.0
Gemini	not sampled this week
Perplexity	15	25% of answers	#5.4

Where they differ

Only OpenAI Realtime API gets named for

Which AI voice agent has the lowest latency?
What's the best AI voice agent for languages other than English?
Which voice AI platform sounds the most natural?
What are the best AI voice agents in 2026?
Which voice AI platform is best for developers?
What's the best AI voice agent for inbound customer support calls?

Only Thoughtly gets named for

What's the best AI agent for outbound sales calls?
What's the best voice AI that connects to my CRM?
What's the best no-code tool to build a voice AI agent?

More comparisons

Not sold on either?

Scores count how often each assistant names a product, weighted by position. How the score works · Full AI voice agents leaderboard