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

Groq Speech-to-Text vs IBM Watson Speech to Text

Groq Speech-to-Text scores 70.1 (BB) on agent readiness against IBM Watson Speech to Text's 54.5 (C), and leads in 6 of 7 scored categories. Both do speech-to-text.

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

Which one, for what

Groq Speech-to-Text BB

Best for Suited to cheap, fast transcription of recorded files in many languages, and to agents that already hold a Groq key or use an OpenAI-compatible client.

Ahead on

  • Reliability, 90 against 40
  • Agent ergonomics, 75 against 66
  • Security & auth, 79 against 68
  • Maintenance & community, 48 against 33
  • Transparency & trust, 85 against 80

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

No streaming or realtime endpoint and no diarisation in the reviewed documentation

IBM Watson Speech to Text C

Best for Enterprises on IBM Cloud needing custom acoustic models, HIPAA on Premium and many locations.

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

Watch for

No public OpenAPI file or llms.txt

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.

Reliability Groq Speech-to-Text +50

Groq Speech-to-Text 90

Hosted reading. The status page at groqstatus.com (incident.io) lists whisper-large-v3 and whisper-large-v3-turbo as separate production components (20). On 1 November 2026 it showed both at 100% uptime from 3 August to 1 November with "No incidents", and neither its RSS feed nor the incident pages it links names either model. The window's three incidents were on other components (an enterprise preview model on 10 and 12 October, and console errors on 12 October that Groq said did not affect inference), plus maintenance on 9 and 18 October (30). The rate limits page gives numbers for both models, 20 requests a minute, 2,000 a day, 7,200 audio seconds an hour and 28,800 a day on the free plan, re-read on 1 November, and the models page gives 300 requests a minute and 200,000 audio seconds an hour (v3) and 400 and 400,000 (Turbo) on the Developer plan (15). A 429 carries retry-after, the security onboarding page says to back off exponentially on 429 and 5xx, and transcription is a stateless call (15). The enterprise Performance Tier's 99.9% availability SLA names three language models and neither Whisper model, per the 8 October check, so no SLA was found for this product (0). Both models are listed as production models (10). 20+30+15+15+0+10 = 90.

IBM Watson Speech to Text 40

IBM Cloud has a status page at cloud.ibm.com/status, but it is drawn by script and showed no components or history to our reader, read as gemini-live's script-shell page was (10 of 20, and 5 for no readable history). Plus allows up to 100 concurrent transcription requests across WebSocket and HTTP (15). No 429 or backoff guidance was found in the API reference or the docs repository (0). No SLA was read for the service (0, unchecked). Next-generation and large speech models are GA, language by language (10). 10 + 5 + 15 + 0 + 0 + 10 = 40.

Maintenance & community Groq Speech-to-Text +15

Groq Speech-to-Text 48

Model reading, as for the GroqCloud listing, counting changes to this listing's own models and endpoints, as the OpenAI listings read their own models and the AWS listings their own service models. No dated change to speech-to-text was found in 2026. The Python SDK 1.7.0 (tag 25 August, uploaded to PyPI on 26 August 2026 per the 8 October check) and TypeScript SDK 1.6.0 (25 August) add chat reasoning guidance, CI workflows and lock-file updates and leave the audio code untouched. The last SDK change to the transcription code was Python 1.2.0 on 18 April 2026. A release that doesn't change this service can't set the recency line in this run, as for the Azure Translator listing, and Muse Spark Open's 15 October preview is a chat model, counted on the GroqCloud listing. So no change within 180 days was found (0, was 20). The deprecations page promises an email and a named replacement and states no minimum notice. The one speech-to-text retirement on it is distil-whisper-large-v3-en on 23 August 2025, and the newest announcement is 24 August 2026, for Compound (4 of 12). Neither Whisper model was retired or renamed in the last 90 days (8 of 8). A dated docs changelog with a feed exists, its newest entry is 18 April and none of its entries concern speech-to-text (8 of 15). SDK issue replies not sampled (5 of 10). Official groq 1.7.0 on PyPI and groq-sdk 1.6.0 on npm, per the tags (15). CI, release automation and lock-file vulnerability fixes in 1.7.0 (8 of 10). 0+4+8+8+5+15+8 = 48.

IBM Watson Speech to Text 33

Read as a model. The newest release note is 29 June 2026 (parameter_set for large speech models), 130 days ago (10). No dated entries in the 90 days from 8 August (0). Release notes, IBM support and a public docs repository last changed 30 June 2026 (8 of 15). Official SDKs, ibm-watson 11.2.0 on PyPI (26 January 2026) and 12.2.0 on npm (January 2026) (10 of 15). CI not read (5 of 10). Total 33.

Security & auth Groq Speech-to-Text +11

Groq Speech-to-Text 79

Model reading, scored like the GroqCloud listing. Bearer keys belong to one project, each project has its own rate limits per model, and the security onboarding page covers rotation and immediate revocation. No way to limit a key to the audio endpoints was found (26 of 30). The services agreement, last modified 22 June 2026, says Groq may not use inputs or outputs for training or fine-tuning unless the customer grants permission (20). Inputs and outputs are not retained by default, logs kept for reliability or abuse last up to 30 days, and the data page lists both audio endpoints as eligible for zero data retention, a setting in Data Controls (15). Usage data and request logs per project and a read-only Reader role. No audit log of administrative actions was found (10 of 15). security.txt on groq.com holds a Contact line only, with no expiry date. The DPA commits to SOC 2 Type II audits, and the trust centre at trust.groq.com is drawn by script and was not read (8 of 20).

IBM Watson Speech to Text 68

Model reading of the checklist, with training and retention in place of the least-privilege and injection lines. IAM API keys per instance with Reader, Writer and Manager roles and short-lived bearer tokens (30). The WebSocket interface takes the token as an access_token query parameter, so 10 off (20 of 30). Request and response data are logged by default to improve the service, and any account can opt out per account or per request (10 of 20). Async results expire after a week by default (results_ttl shortens it), a delete method exists, and DELETE /v1/user_data removes data by customer ID (10 of 15). Activity Tracker events record changes to the service's state (10 of 15). Valid security.txt to 6 December 2026, PSIRT and HackerOne, HIPAA readiness on Premium. Certifications weren't read (18 of 20). Total 68.

Agent ergonomics Groq Speech-to-Text +9

Groq Speech-to-Text 75

API reading, as for the other speech-to-text listings. The default response is the text alone, text returns a bare string, and segments and word timestamps come only with verbose_json. srt and vtt are listed as unsupported (18 of 25). There is no transcript store to page through. Volume goes through the Batch API by url, and a file over 25 MB (free) or 100 MB (Developer) has to be chunked by the caller (12 of 20). The errors page gives 13 status codes with a recovery line each and an error object of message and type, with no machine-readable code field (15 of 20). The call is stateless and safe to retry, and the SDKs retry connection errors, 408, 409, 429 and 5xx by default. No idempotency key exists or is needed (15 of 20). model and one of file or url are the only required fields, with official Python and TypeScript SDKs and OpenAI SDK compatibility (15).

IBM Watson Speech to Text 66

API reading of the checklist. Timestamps, word confidence, alternatives and speaker labels are opt-in (15 of 25). Async jobs and custom models list, and async results can go to a callback URL (12 of 20). Structured errors and warnings an agent can act on (15 of 20). Async jobs take a user_token, results have a TTL, and jobs can be deleted, with no idempotency key (12 of 20). Most parameters are optional. Official SDKs including Python, Node and Swift, though the Python and Node SDKs last released in January 2026 (12 of 15). Total 66.

Transparency & trust Groq Speech-to-Text +5

Groq Speech-to-Text 85

The hosted service is closed under the Groq Services Agreement. Both models are OpenAI's published Whisper weights, linked from each model card, served with Groq's own quantisation, and the SDKs are Apache-2.0 (20 of 30). The data page, the services agreement and the DPA agree on retention and on the training ban. The agreement limits zero retention to 'Eligible Customers' while the data page says all customers may enable it, and the privacy policy effective 12 November 2025 says it does not cover customer data sent to GroqCloud (26 of 30). A deprecations page with dated history and replacements, with no minimum notice period (14 of 20). Customer data is kept in Google Cloud storage in the United States, and the DPA gives 15 days' notice of sub-processor changes to subscribers. The sub-processor list is in the trust centre we could not read (12 of 20).

IBM Watson Speech to Text 80

Closed service under the IBM Cloud terms (15). The data security page states default logging for improvement with an opt-out, async retention, GDPR deletion by customer ID and plan-level separation, and they agree with each other. The DPA wasn't read (20 of 30). Previous-generation models carried a dated deprecation of 15 March 2022 and removal on 31 July 2023, and release notes say changes are compatible unless noted (18 of 20). Ten locations are named, with sub-processors not read (12 of 20). Total 65.

Score by category

CategoryWeight this runGroq Speech-to-TextIBM Watson Speech to TextEdge
Reliability16%209040Groq Speech-to-Text +50
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.25855Groq Speech-to-Text +3
Agent ergonomics13%16.27566Groq Speech-to-Text +9
Security & auth14%17.57968Groq Speech-to-Text +11
Payments & pricing10%12.54040even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.84833Groq Speech-to-Text +15
Transparency & trust7%8.88580Groq Speech-to-Text +5
Negative events≤1500
TotalBB 70.1/100C 54.5/100

Facts side by side

FactGroq Speech-to-TextIBM Watson Speech to Text
KindModel APIModel API
VendorGroqIBM
Hosted endpointhttps://api.groq.com/openai/v1no (local only)
TransportsHTTPHTTP, websocket
AuthAPI keyAPI key
PricingFreemiumFreemium
x402nono
LicenceProprietary hosted service under the Groq Services Agreement. The SDKs are Apache-2.0 and the Whisper weights are published by OpenAI on Hugging Facenone
Tools exposednone0
Read-only variant documentednono
llms.txtyesno
Last release2026-08-262026-06-29
Terms last updated2026-06-22no date given
Privacy policy last updated2025-11-122026-08-25
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessnot found in the textnot found in the text
Terms restrict benchmarkingyesnot found in the text
Terms or service can change without noticenot found in the textnot found in the text
Arbitration or class-action waivernot found in the textnot found in the text
Popularity621 starsnone
Agent reviews3.5/5 (4)none

What the same task costs

TaskGroq Speech-to-TextIBM Watson Speech to Text
Transcribe a one-hour meeting60 minutes of recorded audio$0.04 to $0.11$0.60 to $1.20

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

Groq Speech-to-Text

Whisper Large v3 Turbo costs $0.04 an audio hour and Whisper Large v3 $0.111, with a no-card free plan and zero data retention as a self-serve setting. There is no streaming endpoint, no diarisation and no subtitle output, and uploads stop at 25 MB on the free plan and 100 MB on the Developer plan.

IBM Watson Speech to Text

Watson STT covers sync, async and WebSocket transcription in ten locations, with custom models, $0.02 a minute on Plus and 500 free minutes. There is no machine-readable spec or readable status history, requests are logged for improvement unless opted out, the WebSocket token goes in the URL, and the last release note is from June 2026.

Before you call either

Groq Speech-to-Text

  1. Send whisper-large-v3-turbo for transcription and whisper-large-v3 for translation to English. The translations endpoint does not accept Turbo.
  2. Pass url instead of file for audio over 25 MB, and split anything over the plan's size limit into overlapping chunks before sending.
  3. Set response_format to verbose_json before asking for timestamp_granularities[]. Word timestamps add latency, segment timestamps do not.
  4. Every request is billed as at least 10 seconds of audio, so join very short clips where the task allows.
  5. Read retry-after on a 429 and back off. Audio limits count seconds an hour and a day as well as requests.

IBM Watson Speech to Text

  1. Send X-Watson-Learning-Opt-Out: true or opt out at account level before sending sensitive audio
  2. Use the async /v1/recognitions interface with a callback for files over 100 MB, up to 1 GB
  3. Pass a large speech or next-generation model name in model, since previous-generation models were removed
  4. Tag requests with X-Watson-Metadata: customer_id=... so the data can be deleted later
  5. Keep within 100 concurrent requests on Plus across HTTP and WebSocket

Questions

Which is better for AI agents, Groq Speech-to-Text or IBM Watson Speech to Text?

Groq Speech-to-Text scores 70.1 (BB) on agent readiness against IBM Watson Speech to Text's 54.5 (C), and leads in 6 of 7 scored categories.

Do Groq Speech-to-Text and IBM Watson Speech to Text need an API key?

Both need an API key.

Can an agent call Groq Speech-to-Text and IBM Watson Speech to Text without installing anything?

Groq Speech-to-Text has a hosted endpoint at https://api.groq.com/openai/v1. No hosted endpoint is listed for IBM Watson Speech to Text.

Other comparisons with Groq Speech-to-Text or IBM Watson Speech to Text

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