CekuraBench
Book a demo

ElevenLabs vs Smallest AI

All comparisonsLeaderboardTest your agent

ElevenLabs is ahead on repeatable reliability, infrastructure reliability, voice tone and clarity, interruption handling and response time, and Smallest AI on task completion and tool call accuracy.

ElevenLabs ranked 4 of 10 · Smallest AI ranked 9 of 10

Last updated Methodology by Luis Ojeda

Which to pick

Pick ElevenLabs for reliability across repeated runs (13.41 points higher), calls that connect and stay up (3.66 points higher), how the agent sounds (0.10 higher), handling interruptions (0.05 higher) and fast replies (1.44s faster). Pick Smallest AI for completing the caller's task (2.85 points higher) and accurate tool calls (0.15 higher).

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.

ElevenLabs
69.51%4th
Smallest AI
56.10%9th

ElevenLabs, 13.41 points higher

Task completion

Calls where the expected outcome was fully reached.

ElevenLabs
91.46%9th
Smallest AI
94.31%5th

Smallest AI, 2.85 points higher

Infrastructure-clean calls

Calls with no connection, audio or platform failure.

ElevenLabs
100.00%1st
Smallest AI
96.34%7th

ElevenLabs, 3.66 points higher

Tool call accuracy

Mean score for calling the right tool with the right arguments.

ElevenLabs
4.43/58th
Smallest AI
4.58/56th

Smallest AI, 0.15 higher

Voice tone and clarity

Mean score for how clear and natural the agent sounds.

ElevenLabs
4.47/51st
Smallest AI
4.37/52nd

ElevenLabs, 0.10 higher

Interruption handling

Mean score for yielding and recovering when the caller cuts in.

ElevenLabs
4.96/57th
Smallest AI
4.91/58th

ElevenLabs, 0.05 higher

Mean response time

Mean time for the agent to start replying after the caller stops.

ElevenLabs
1.27s1st
Smallest AI
2.71s8th

ElevenLabs, 1.44s faster

246 calls per platform: 82 scenarios, 3 runs each.

What each platform ran, and what we saw

ElevenLabs

Strength
Fastest response at 1.27s, highest Voice Tone + Clarity at 4.47/5, and 100% infrastructure-clean calls.
What can be improved
The agent narrated a tool call and continued with an invented result.
STT, LLM and TTS
  • scribe_realtime
  • qwen35-397b-a17b
  • eleven_flash_v2
Open example All ElevenLabs calls

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)
Open example All Smallest AI calls

Related comparisons

ElevenLabs vs Smallest AI FAQ

  • ElevenLabs is more reliable, by 13.41 points. ElevenLabs passed 69.51% of the 82 scenarios on all 3 runs and Smallest AI passed 56.10%. A scenario only counts when every run of it passed.

  • ElevenLabs starts replying sooner, 1.44s faster. Mean response time is 1.27s for ElevenLabs and 2.71s for Smallest AI.

  • ElevenLabs reached the expected outcome on 91.46% 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.

Book a demoStart free