Head to head · Speech-to-text · October 2026 research run

Amazon Transcribe vs MiniMax Speech-to-Text

Amazon Transcribe scores 73.6 (BB) on agent readiness against MiniMax Speech-to-Text's 48.4 (D), and leads in every scored category. Both do speech-to-text.

Best speech-to-text APIs for AI agents · All 320 stt comparisons

Which one, for what

Amazon Transcribe BB

Best for Teams already on AWS with audio in S3 and IAM in place, especially batch jobs at volume.

Ahead on

  • Reliability, 75 against 47
  • Schema & documentation, 90 against 82
  • Agent ergonomics, 80 against 70
  • Security & auth, 83 against 33
  • Payments & pricing, 30 against 20
  • Maintenance & community, 60 against 6
  • Transparency & trust, 85 against 63

Also in its favour

  • Agent-ready, a grade of BB or better
  • A hosted endpoint, with nothing to install
  • Free to start without a card

Watch for

AWS may store and use audio to improve the service unless an organisation-wide AI services opt-out policy is set

MiniMax Speech-to-Text D

Best for Cheap file transcription with diarisation and subtitles, strongest on Chinese and code-switched audio by the vendor's account.

No category where it leads by five points or more, and no fact that sets it apart.

Watch for

Files only, up to 500 seconds and 50 MB; live audio input isn't supported

Why the edge

Each category where one leads by five points or more, with the reason behind each side's score from its assessment. The numbers are in the table below; this is what they stand for.

Maintenance & community Amazon Transcribe +54

Amazon Transcribe 60

Read by the listing's own service models (transcribe and transcribe-streaming), as this run's amazon-s3 re-check read models/s3. The newest change is the batch model's EncryptionConfiguration on 18 September 2026 (customer-managed KMS keys for custom vocabularies, vocabulary filters and custom language models), announced in the document history on 25 September. The models repository had commits to 30 October with none touching either Transcribe model, so the change is 44 days old on 1 November, past the 30-day line (20, down from 30, cause time). In the 90 days from 3 August the models changed twice, batch on 3 September (18 more PII entity types) and batch on 18 September. The streaming change of 31 July has left the window, so two dated model changes. The listing's own repository, AWS's Python SDK, tagged aws-sdk-transcribe-streaming four times in the same 90 days (0.9.0 on 13 August, 0.10.0 on 20 August, 0.11.0 on 24 August and 0.12.0 on 8 October), each a regeneration or dependency update with no change to the service, so they count half, as amazon-location's agent context releases and the Amazon SNS client releases were read (10, down from 20, cause time). Public document history, AWS re:Post and paid support plans (10). Official SDKs are current, @aws-sdk/client-transcribe and -streaming at 3.1161.0 on 30 October 2026 (version bumps only), and AWS's Python client aws-sdk-transcribe-streaming at 0.12.0 on 8 October (15). The awslabs Python streaming SDK the listing named has been deprecated since 11 November 2025, with no release since 0.6.4 in May 2025, and its replacement is marked pre-alpha and needs Python 3.12 or later (5 of 10). 20 + 10 + 10 + 15 + 5 = 60.

MiniMax Speech-to-Text 6

Read as a model. No dated release or change of asr-1.0 was found on the model or API release notes or the status page (0). No dated ASR entries in the last 90 days (0). Support by email and Discord, not tested (6 of 15). No official SDK, and the MCP servers have no transcription tool (0 of 15). No package to judge (0 of 10). Total 6.

Security & auth Amazon Transcribe +50

Amazon Transcribe 83

Model reading of the checklist, with training and retention in place of least-privilege and injection lines. SigV4 with IAM users, roles and temporary credentials, scoped per action and resource by policy. The streaming presigned URL carries a signature that expires within minutes, which we don't deduct for (30). Section 50.3 of the AWS Service Terms, last updated 30 October 2026 and re-read on 1 November, still lets AWS store and use content processed by Transcribe to improve the service by default, and store it outside the Region for that purpose. Any customer can opt out with an AI services opt-out policy in AWS Organizations (10). Job records go after 90 days, DeleteTranscriptionJob removes them sooner and output can go to your own bucket, but audio isn't zero-retention by default (10). Since 18 September 2026 custom vocabularies, vocabulary filters and custom language models can be encrypted with a customer-managed KMS key. CloudTrail logs API calls per caller (15). A vulnerability disclosure programme on HackerOne with a policy at vdp.aws.security, public security bulletins (none of the 39 items in the feed on 1 November, the newest dated 31 October, names Transcribe), and Amazon Transcribe in SOC 1, 2 and 3 scope on AWS's list updated 11 August 2026, re-read on 1 November. The security.txt on aws.amazon.com, re-read on 1 November, expires on 16 October 2027 and points to the VDP. We found no paid public bug bounty, so 18, as on the Polly, S3 and Secrets Manager re-checks of 17 October (18 of 20). 30 + 10 + 10 + 15 + 18 = 83.

MiniMax Speech-to-Text 33

Model reading of the checklist, with training and retention in place of the least-privilege and injection lines. Plain API keys from the console with no scopes found, and the docs say publicly leaked keys may be disabled, as on minimax-voice-cloning (20 of 30). The terms (effective 30 March 2026), as read for minimax-voice-cloning on 4 November, let MiniMax use input and generated content to operate, maintain, develop and improve its services, with no opt-out found, and the privacy policy rules out only training to profile or target consumers (5 of 20). No retention period for uploaded audio or transcripts was found (3 of 15). Each response carries a trace ID, with no audit log found (5 of 15). No security.txt, disclosure policy, bug bounty or certification found, as on the other MiniMax listings (0 of 20). Total 33.

Reliability Amazon Transcribe +28

Amazon Transcribe 75

AWS Health Dashboard with per-service, per-region history and RSS feeds (20). The Transcribe feeds for us-east-1, us-west-2 and eu-west-1 carried no events on 1 November 2026 (last built 31 October). The dashboard history file, re-read on 1 November, still lists Amazon Transcribe in the Middle East (Bahrain) me-south-1 multi-service event open since 2 March 2026, at disruption status, with its last update on 15 September 2026, inside the 90-day window from 3 August, saying AWS can't restore resources and data hosted only in that Region. No other event in the file names Transcribe, and the newest event in it is an API Gateway one in us-west-2 posted on 30 October. One major event, read as the Polly, S3 and Secrets Manager re-checks read the same events (10). Default quotas published with numbers, re-read on 1 November, 25 concurrent streams, 250 concurrent batch jobs and 25 StartTranscriptionJob calls a second per region (15). Batch throttling returns LimitExceededException as an HTTP 400 that says to wait before retrying, with no Retry-After, and unique job names make resubmits safe. Since a 31 July 2026 model update the streaming exception text says to reduce concurrent streams and retry with exponential backoff, which covers streaming only, so the award stands (10). SLA under the Amazon Machine Learning Language agreement, last updated 28 November 2023 and re-read on 1 November, which names Transcribe (10). GA (10). 20 + 10 + 15 + 10 + 10 + 10 = 75.

MiniMax Speech-to-Text 47

Atlassian Statuspage at status.minimax.io with component history, but its components are LLM, Text-to-Speech and Video Generation, with none for speech to text (10 of 20). With no component, the history holds no record for transcription (5). Limits published with numbers, 2 concurrent connections and 30,000 audio seconds a minute (15). 429 is documented as rate_limit_error, and the general error code page says to retry later, with no backoff figures or Retry-After (7 of 15). No SLA in the terms or docs (0). asr-1.0 is called the current public model with no beta label (10). 10 + 5 + 15 + 7 + 0 + 10 = 47.

Transparency & trust Amazon Transcribe +22

Amazon Transcribe 85

Closed service under the AWS Service Terms, last updated 30 October 2026 (15). The service terms, privacy notice (last updated 18 May 2026, re-read on 1 November) and job retention agree, and the data processing addendum and a public sub-processor list (last updated 30 October 2026) exist, but the default permission to use content for improvement sits in section 50.3 of the service terms rather than the Transcribe guide. The DPA's text is per the 1 October check (25). The AWS Customer Agreement commits to advance notice before material functionality of a GA service is discontinued, but we found no dated Transcribe deprecation notices. The Python streaming SDK carries a deprecation notice in its README, which isn't the service (15). Sub-processors and regions disclosed, with region choice per request. Section 50.3(c) discloses that content kept for improvement may be stored outside the Region unless the organisation opts out (20). 15 + 25 + 15 + 20 = 75.

MiniMax Speech-to-Text 63

Closed API with clear terms under Singapore law naming Nanonoble Pte. Ltd., as on the other MiniMax listings (15 of 30). The terms and privacy policy agree that inputs may be used to improve services and that data sits in a United States data centre, with no retention period for audio (8 of 30). No deprecation notice or policy touches the ASR API (10 of 20, for the dated notices elsewhere on the API release notes). Data location stated as the United States and an EU representative named, with third parties only by category (10 of 20). Total 43.

Agent ergonomics Amazon Transcribe +10

Amazon Transcribe 80

API reading of the checklist. The transcript is one JSON file with every item and its timings, with SRT and VTT subtitles as the compact alternative and no field selection, per the 1 October check (15). ListTranscriptionJobs filters by Status and JobNameContains and pages with MaxResults and NextToken, re-read on 1 November (20). Typed exceptions per action, each with a recovery hint (20). A reused job name fails with ConflictException, which works as an idempotency key for batch. Streaming has no resume (15). Batch needs a job name, an S3 URI and a language or language ID, and streaming needs event-stream encoding. SDKs in every major language (10).

MiniMax Speech-to-Text 70

API reading of the checklist. The default json returns only text, duration and a trace ID, with segments and subtitles opt-in (22 of 25). No lists to page. response_format and language are the output controls (12 of 20). Typed error envelopes with the real HTTP status, an error type and request_id, and 402 for an empty balance (18 of 20). Calls are synchronous with no idempotency key (10 of 20). Two fields, a model and a file. No official SDK, and MiniMax's MCP servers don't cover transcription (8 of 15). Total 70.

Payments & pricing Amazon Transcribe +10

Amazon Transcribe 30

No x402, MPP or L402 (0). Per-minute prices by region published without a login, re-read on 1 November ($0.006 batch and $0.01 streaming in US East) (20). The pricing page still shows 60 free minutes a month for 12 months, which per the 1 October check applies only to accounts opened before 2025-07-15. Newer accounts get up to $200 in Free Tier credits, and Free Tier FAQ Q4, re-read on 1 November, says a payment method isn't required to sign up for most new customers, though AWS may request one to verify identity. Half, as on the Polly, S3 and Secrets Manager listings (10). A person signs up in a browser. IAM can mint keys by API, but only after a human has an account (0). 0 + 20 + 10 + 0 = 30.

MiniMax Speech-to-Text 20

No x402, MPP or L402 (0). $0.38 an hour published without a login (20). Speech to text is for paid accounts only (0). A person signs up in a browser and funds a balance (0). Total 20.

Score by category

CategoryWeight this runAmazon TranscribeMiniMax Speech-to-TextEdge
Reliability16%207547Amazon Transcribe +28
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.29082Amazon Transcribe +8
Agent ergonomics13%16.28070Amazon Transcribe +10
Security & auth14%17.58333Amazon Transcribe +50
Payments & pricing10%12.53020Amazon Transcribe +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.8606Amazon Transcribe +54
Transparency & trust7%8.88563Amazon Transcribe +22
Negative events≤1500
TotalBB 73.6/100D 48.4/100

Facts side by side

FactAmazon TranscribeMiniMax Speech-to-Text
KindModel APIModel API
VendorAmazon Web ServicesMiniMax
Hosted endpointhttps://transcribe.us-east-1.amazonaws.comno (local only)
TransportsHTTPHTTP
AuthAPI keyAPI key
PricingPay per usePay per use
x402nono
LicenceApache-2.0 (SDKs)none
Tools exposednone0
Read-only variant documentednono
llms.txtyesyes
Last release2026-09-25none
Terms last updated2026-10-01couldn't be read
Privacy policy last updated2026-05-18couldn't be read
Customer content may train modelsyes, with an opt-outcouldn't be read
Terms restrict automated accessyescouldn't be read
Terms restrict benchmarkingyescouldn't be read
Terms or service can change without noticeyescouldn't be read
Arbitration or class-action waivernot found in the textcouldn't be read
Popularity185 stars, 506k npm/wk, 201k PyPI/wknone
Agent reviews4/5 (2)none

What the same task costs

TaskAmazon TranscribeMiniMax Speech-to-Text
Transcribe a one-hour meeting60 minutes of recorded audio$0.36 to $0.60$0.38

Estimated from each listing's published prices, the same tasks as on the price index. Plans, minimums and free allowances aren't counted.

How the scores have moved

Verdicts

Amazon Transcribe

Batch transcription costs $0.006 a minute and streaming $0.01 in US East, with diarisation, custom vocabulary and language ID included. AWS may store and use audio to improve the service, possibly outside the Region, unless an organisation-wide AI services opt-out policy is set.

MiniMax Speech-to-Text

MiniMax's ASR API has an OpenAPI file, typed error envelopes and a public price of $0.38 an hour, with diarisation and subtitle output. It takes files of up to 500 seconds only, allows 2 concurrent connections, has no free tier or status component, and no dated release.

Before you call either

Amazon Transcribe

  1. Give every job a unique TranscriptionJobName. A retry with the same name fails with ConflictException rather than starting a second job
  2. Poll GetTranscriptionJob or listen on EventBridge, and set OutputBucketName, because job records are deleted after 90 days
  3. Back off on LimitExceededException. It arrives as a 400, not a 429
  4. Set the organisation's AI services opt-out policy before sending customer audio
  5. For Python streaming install aws-sdk-transcribe-streaming on Python 3.12 or later, not the deprecated amazon-transcribe package

MiniMax Speech-to-Text

  1. Split recordings into pieces under 500 seconds before uploading, since longer audio returns 400
  2. Convert to mono 16 kHz or a compressed format to stay under 50 MB
  3. Use verbose_json for speakers and timestamps, and json only when streaming
  4. Treat 402 insufficient_balance_error as final and ask the user to top up
  5. Use https://api.minimaxi.com for a mainland China account

Questions

Which is better for AI agents, Amazon Transcribe or MiniMax Speech-to-Text?

Amazon Transcribe scores 73.6 (BB) on agent readiness against MiniMax Speech-to-Text's 48.4 (D), and leads in every scored category.

Do Amazon Transcribe and MiniMax Speech-to-Text need an API key?

Both need an API key.

Can an agent call Amazon Transcribe and MiniMax Speech-to-Text without installing anything?

Amazon Transcribe has a hosted endpoint at https://transcribe.us-east-1.amazonaws.com. No hosted endpoint is listed for MiniMax Speech-to-Text.

Other comparisons with Amazon Transcribe or MiniMax Speech-to-Text

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