Goodcall vs OpenAI Realtime API

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

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Goodcall and OpenAI Realtime API both stay niche in AI answers, but for different reasons. Goodcall scores 6 overall (ChatGPT 9, Claude 7, Perplexity 3) and shows up in just 6 of 60 answers, mostly when the question is about small business phone agents or receptionists—it swept all 3 of 3 answers for "best AI phone agent for a small business." OpenAI Realtime API scores slightly higher overall at 8, driven almost entirely by Claude (22), and appears in 9 of 60 answers, most often tied to low-latency questions (2 of 3). Head-to-head, OpenAI Realtime API leads in 7 questions, Goodcall in 2, with 11 ties.

Head to head

metric	Goodcall	OpenAI Realtime API
score	6	8
questions won	3	8

By assistant

Goodcall

assistant	score	named in, this week	usual spot, this week
ChatGPT	9	10% of answers	#1.5
Claude	7	15% of answers	#8.0
Gemini	not sampled this week
Perplexity	3	5% of answers	#7.0

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

Where they differ

Only Goodcall gets named for

What's the best AI phone agent for a small business?
What's the best AI receptionist for answering calls?

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?
What are the best AI voice agent platforms?
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?

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