Assemblyai Reduces Streaming Speech-to-Text Pricing by 68% from $0.47/hr to $0.15/hr, Enhancing Accessibility for Users
What happened
Between the Apr 1, 2025 and Jul 6, 2025 captures of Assemblyai's pricing page, Pulse recorded 10 changes: Claude 3.7 Sonnet LLM model added to LeMUR offerings; BAA for HIPAA Compliance moved from Custom plan only to Pay-as-you-go and Custom plans (feature democratization); Streaming Speech-to-Text feature 'End of Utterance Detection' renamed to 'End of Turn Detection'; Keyterm Prompting feature added to Slam-1 model (supports up to 1000 domain-specific words or phrases); Streaming Speech-to-Text decreased from $0.47/hr to $0.15/hr (68% reduction); Free tier pre-recorded audio hours decreased from 416 hours to 185 hours; Streaming concurrency limit changed from '100 streams' to '5 new streams per minute' for Free tier, with Pay-as-you-go now starting at '100 concurrent streams with 10% ramp per minute'; Pre-recorded Speech-to-Text restructured from Best/Nano tiers to Slam-1/Universal models, both now priced at $0.27/hr (Best decreased from $0.37, Nano increased from $0.12); Free tier streaming audio hours limit added: Up to 333 hours; Claude 3.5 Haiku LLM model added to LeMUR offerings. Pulse files it as a pricing change (feature added, feature change, price decrease, limit decrease, package change, threshold added) with a downward 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.
Assemblyai's previous recorded change was "Assemblyai Expands EU Data Residency to Full Availability Across All Plans, Enhancing Compliance and Flexibility for Users" (Q1 2025). Assemblyai has been tracked since 2023-11-14.
In the same window Deepgram also changed their AI & Machine Learning pricing pages. Those moves are listed further down, and the Pulse Agent can compare them side by side.
- — · FeatureAdded
BeforeNo Claude 3.7 Sonnet LLM model
AfterClaude 3.7 Sonnet LLM model
- Custom · FeatureChanged
BeforeCustom plan only
AfterPay-as-you-go and Custom plans
- — · FeatureRenamed
BeforeStreaming Speech-to-Text feature 'End of Utterance Detection'
After'End of Turn Detection'
- — · FeatureAdded
BeforeNo Keyterm Prompting feature
AfterKeyterm Prompting feature
- — · Price−68%$0.47/hr$0.15/hr
- — · Limit−56%416 hours185 hours
- — · PackagingReworded100 streams5 new streams per minute
- Nano · PackagingChangedBest/Nano tiersSlam-1/Universal models
- — · LimitAdded
BeforeNot listed
AfterFree tier streaming audio hours limit
- — · FeatureAdded
BeforeNo Claude 3.5 Haiku LLM model
AfterClaude 3.5 Haiku LLM model
| Plan | Field | Before | After | Change |
|---|---|---|---|---|
| — | Feature | No Claude 3.7 Sonnet LLM model | Claude 3.7 Sonnet LLM model | Added |
| Custom | Feature | Custom plan only | Pay-as-you-go and Custom plans | Changed |
| — | Feature | Streaming Speech-to-Text feature 'End of Utterance Detection' | 'End of Turn Detection' | Renamed |
| — | Feature | No Keyterm Prompting feature | Keyterm Prompting feature | Added |
| — | Price | $0.47/hr | $0.15/hr | −68% |
| — | Limit | 416 hours | 185 hours | −56% |
| — | Packaging | 100 streams | 5 new streams per minute | Reworded |
| Nano | Packaging | Best/Nano tiers | Slam-1/Universal models | Changed |
| — | Limit | Not listed | Free tier streaming audio hours limit | Added |
| — | Feature | No Claude 3.5 Haiku LLM model | Claude 3.5 Haiku LLM 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 Apr 1, 2025 and Jul 6, 2025; the change is marked on the page, where price reads $0.47/hr and then $0.15/hr.
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Assemblyai, the last 90 days
Full history- 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
- Q2 2025packagingAssemblyai Reduces Streaming Speech-to-Text Pricing by 68% from $0.47/hr to $0.15/hr, Enhancing Accessibility for Users · this change
- Q1 2025improvedAssemblyai Expands EU Data Residency to Full Availability Across All Plans, Enhancing Compliance and Flexibility for Users
Across AI & Machine Learning in the same window
All AI & Machine Learning changes- DeepgramJan 11Deepgram Introduces Self-Service Rate Limit Requests for Aura TTS API in Pay As You Go and Growth Plans
- DeepgramJan 11Deepgram Introduces New Flux Model Pricing: $0.0077/min for Pay As You Go and $0.0065/min for Growth Plan After Free Promotional Period Ends
- DeepgramJan 11Deepgram Restructures Voice Agent API Pricing to Per-Minute Model, Introducing New Tiers and Significant Cost Savings
- DeepgramJan 11Deepgram Raises Enterprise Plan Pricing by 50% to $15k+ Annually Amid New Model Launch and Feature Additions
- DeepgramJan 11Deepgram Expands Aura TTS Growth Plan with Major Increase to 80 Concurrent WebSocket Connections
Questions about this change
Did Assemblyai raise prices in July 2025?
No — prices went down. Between Apr 1, 2025 and Jul 6, 2025 Assemblyai's pricing page showed 1 price cut: $0.47/hr → $0.15/hr (−68%).
What changed on Assemblyai's pricing page between Apr 1, 2025 and Jul 6, 2025?
Feature: No Claude 3.7 Sonnet LLM model → Claude 3.7 Sonnet LLM model, added; Custom feature: Custom plan only → Pay-as-you-go and Custom plans, changed; feature: Streaming Speech-to-Text feature 'End of Utterance Detection' → 'End of Turn Detection', renamed; feature: No Keyterm Prompting feature → Keyterm Prompting feature, added; price: $0.47/hr → $0.15/hr (−68%); limit: 416 hours → 185 hours (−56%); packaging: 100 streams → 5 new streams per minute, reworded; Nano packaging: Best/Nano tiers → Slam-1/Universal models, changed; limit: Not listed → Free tier streaming audio hours limit, added; feature: No Claude 3.5 Haiku LLM model → Claude 3.5 Haiku LLM model, added. Pulse compared the captures it took on Apr 1, 2025 and Jul 6, 2025; the before/after table above lists each item as written on the page.
How often does Assemblyai change its pricing?
Pulse recorded 1 other pricing-page change for Assemblyai in the 90 days before this one; the previous change was "Assemblyai Expands EU Data Residency to Full Availability Across All Plans, Enhancing Compliance and Flexibility for Users" in Q1 2025; Assemblyai has been tracked since 2023-11-14.