AssemblyAI adds Claude 4.6 Sonnet, Opus models to LLM Gateway
What happened
Between the Mar 9, 2026 and Mar 16, 2026 captures of Assemblyai's pricing page, Pulse recorded one change: Added Claude 4.6 Sonnet model to LLM Gateway at $3.00/1m tokens (input), $15.00/1m tokens (output); Added Claude 4.6 Opus model to LLM Gateway at $5.00/1m tokens (input), $25.00/1m tokens (output); Added Claude 4.5 Opus model to LLM Gateway at $5.00/1m tokens (input), $25.00/1m tokens (output). Pulse files it as a packaging change (new add-on) with an upward direction. Pulse's latest capture (Aug 24, 2026) lists Voice Agent API at $4.5 per hour + $4.5 per hour, Universal-3 Pro at $0.21 per hour of audio, Universal-Streaming Multilingual at $0.15 per hour of audio, Universal-3 Pro Streaming at $0.45 per hour of audio and Universal-2 at $0.15 per hour of audio.
It lands 5 days after Assemblyai's previous change, "Assemblyai launches Universal-3 Pro Streaming at $0.45/hr for voice agents" (Mar 10, 2026). Before that Pulse recorded "Assemblyai rebrands Audio Intelligence as Speech Understanding" (Week 7, 2026), "Assemblyai unveils Gemini 2.5 Flash Lite model at competitive pricing" (Feb 9, 2026) and "Assemblyai Introduces Guardrails: New Product Category Consolidating Safety Features for Enhanced Transcription Security" (Jan 11, 2026). Assemblyai has been tracked since 2023-11-14.
In the same window Deepgram and Otter also changed their AI & Machine Learning pricing pages. Those moves are listed further down, and the Pulse Agent can compare them side by side.
- LLM Gateway · Add-onAdded
BeforeNo Claude 4.6 Sonnet model
AfterClaude 4.6 Sonnet model
| Plan | Field | Before | After | Change |
|---|---|---|---|---|
| LLM Gateway | Add-on | No Claude 4.6 Sonnet model | Claude 4.6 Sonnet model | Added |
Values as written on Assemblyai's public pricing page in the two captures Pulse compared; where the page states no number, the cells give the wording before and after.
Evidence
The two captures Pulse comparedFull-page captures of Assemblyai's pricing page (assemblyai.com) from Mar 9, 2026 and Mar 16, 2026; the change is marked around the middle of the page, where Claude 4.6 Sonnet model now appears.
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Assemblyai, the last 90 days
Full history- Apr 9, 2026improvedAssemblyai unifies audio limits with expanded 333h free allowance
- Apr 1, 2026packagingAssemblyai Launches Medical Mode for Healthcare Transcription
- Apr 4, 2026packagingAssemblyai cuts flagship STT price 22% with Universal-3 Pro rebrand
- Mar 16, 2026packagingAssemblyAI adds Claude 4.6 Sonnet, Opus models to LLM Gateway · this change
- Mar 10, 2026packagingAssemblyai launches Universal-3 Pro Streaming at $0.45/hr for voice agents
- Week 7, 2026packagingAssemblyai rebrands Audio Intelligence as Speech Understanding
- Feb 9, 2026packagingAssemblyai unveils Gemini 2.5 Flash Lite model at competitive pricing
- Jan 11, 2026packagingAssemblyai Introduces Guardrails: New Product Category Consolidating Safety Features for Enhanced Transcription Security
Across AI & Machine Learning in the same window
All AI & Machine Learning changes- DeepgramFeb 16Deepgram triples concurrency limits across all API tiers
- OtterJan 12Otter Decreases Pro Plan Price to $8.33/user/month and Increases Annual Billing Discount to 51%
- OtterJan 12Otter Reduces Video Replay Support to Zoom and Google Meet, Updates Enterprise Security Features to Include Upcoming HIPAA Compliance
- OtterJan 12Otter Reduces Enterprise Plan AI Chat Queries from 500 to 200 per User
- OtterJan 12Otter Expands OtterPilot for Sales Integration, Now Syncs Notes to Hubspot and Salesforce
Questions about this change
Did Assemblyai raise prices in March 2026?
No list-price increase was recorded between Mar 9, 2026 and Mar 16, 2026. The change Pulse detected was a packaging change: new add-on.
What changed on Assemblyai's pricing page between Mar 9, 2026 and Mar 16, 2026?
LLM Gateway add-on: No Claude 4.6 Sonnet model → Claude 4.6 Sonnet model, added. Pulse compared the captures it took on Mar 9, 2026 and Mar 16, 2026; the before/after table above lists each item as written on the page.
How often does Assemblyai change its pricing?
Pulse recorded 4 other pricing-page changes for Assemblyai in the 90 days before this one; the previous change was "Assemblyai launches Universal-3 Pro Streaming at $0.45/hr for voice agents" on Mar 10, 2026; Assemblyai has been tracked since 2023-11-14.