Pipecat
- Strength
- A 1.97s response time with 94.21% task completion across 242 scored calls.
- What can be improved
- Routing completed, but the returned route ID was omitted from the handoff.
STT, LLM and TTS
- nova-3-general
- gpt-4.1
- sonic-3.5
Pipecat vs Smallest AI
Pipecat is ahead on repeatable reliability, infrastructure reliability, interruption handling and response time, and Smallest AI on task completion and voice tone and clarity. The two tie on tool call accuracy.
Pipecat ranked 7 of 10 · Smallest AI ranked 9 of 10
Last updated Methodology by Luis Ojeda
Which to pick
Pick Pipecat for reliability across repeated runs (7.31 points higher), calls that connect and stay up (0.81 points higher), handling interruptions (0.06 higher) and fast replies (0.75s faster). Pick Smallest AI for completing the caller's task (0.10 points higher) and how the agent sounds (0.63 higher). They are level on accurate tool calls.
Every metric, side by side
Bars share one scale across all 10 platforms. The place next to each figure is its rank in the field.
Repeatable reliability
Share of the 82 scenarios that passed on all three runs.
- Pipecat
- 63.41%7th
- Smallest AI
- 56.10%9th
Pipecat, 7.31 points higher
Task completion
Calls where the expected outcome was fully reached.
- Pipecat
- 94.21%6th
- Smallest AI
- 94.31%5th
Smallest AI, 0.10 points higher
Infrastructure-clean calls
Calls with no connection, audio or platform failure.
- Pipecat
- 97.15%6th
- Smallest AI
- 96.34%7th
Pipecat, 0.81 points higher
Tool call accuracy
Mean score for calling the right tool with the right arguments.
- Pipecat
- 4.58/56th
- Smallest AI
- 4.58/56th
Level
Voice tone and clarity
Mean score for how clear and natural the agent sounds.
- Pipecat
- 3.74/59th
- Smallest AI
- 4.37/52nd
Smallest AI, 0.63 higher
Interruption handling
Mean score for yielding and recovering when the caller cuts in.
- Pipecat
- 4.97/54th
- Smallest AI
- 4.91/58th
Pipecat, 0.06 higher
Mean response time
Mean time for the agent to start replying after the caller stops.
- Pipecat
- 1.97s4th
- Smallest AI
- 2.71s8th
Pipecat, 0.75s faster
246 calls per platform: 82 scenarios, 3 runs each.
What each platform ran, and what we saw
Smallest AI
- Strength
- 94.31% task completion across all 246 calls, and 62.71% pass³ on the Appointment suite (37 of 59 scenarios).
- What can be improved
- Atoms tool parameters cannot be arrays, so Medicare list arguments arrive as comma-separated text; its tool accuracy reads that text as a list. With the standard check it scores 45.12% pass³.
STT, LLM and TTS
- pulse
- electron
- waves_lightning_v3_1_pro (chelsea)
Related comparisons
- Pipecat vs PolyAI
- Pipecat vs Retell
- Pipecat vs LiveKit
- Pipecat vs ElevenLabs
- Pipecat vs Telnyx
- Pipecat vs GPT Realtime
- Pipecat vs Vapi
- Pipecat vs Gemini Live
- Smallest AI vs PolyAI
- Smallest AI vs Retell
- Smallest AI vs LiveKit
- Smallest AI vs ElevenLabs
- Smallest AI vs Telnyx
- Smallest AI vs GPT Realtime
- Smallest AI vs Vapi
- Smallest AI vs Gemini Live
Pipecat vs Smallest AI FAQ
Is Pipecat or Smallest AI more reliable?
Pipecat is more reliable, by 7.31 points. Pipecat passed 63.41% of the 82 scenarios on all 3 runs and Smallest AI passed 56.10%. A scenario only counts when every run of it passed.
Pipecat is more reliable, by 7.31 points. Pipecat passed 63.41% of the 82 scenarios on all 3 runs and Smallest AI passed 56.10%. A scenario only counts when every run of it passed.
Pipecat starts replying sooner, 0.75s faster. Mean response time is 1.97s for Pipecat and 2.71s for Smallest AI.
Pipecat reached the expected outcome on 94.21% of calls and Smallest AI on 94.31%. Smallest AI is ahead on task completion.
Both ran the same Appointment and Medicare agents through the same 82 caller scenarios, 3 times each, with the same evaluators and mock tools. Only the platform and its speech and model components changed.
Test your voice agent the same way.
Cekura runs these simulated calls on your agent and scores every one.