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Head to head · Voice agents · October 2026 research run

GPT-Live vs Vocily AI

GPT-Live scores 66.8 (B) on agent readiness against Vocily AI's 53.8 (D), and leads in 4 of 7 scored categories. Vocily AI leads on agent ergonomics and payments & pricing. Both do voice agents.

Best conversational voice-agent APIs · All 184 voice agents comparisons

GPT-LiveOpenAI · HTTP API B66.8/100#296 of 1133 Vocily AIVocily AI Private Limited · HTTP API D53.8/100#778 of 1133

Which one, for what

GPT-Live B

Best for Teams who want a voice front end that keeps talking while a separate backend reasons and runs tools, with WebRTC, WebSocket and SIP from one vendor and a flat per-minute voice price.

Ahead on

  • Reliability, 62 against 40
  • Security & auth, 66 against 46
  • Maintenance & community, 82 against 61
  • Transparency & trust, 76 against 47

Also in its favour

  • No incidents deducted, where Vocily AI loses 5 points for them

Watch for

openai.com answered 403 to our reader on 17 October 2026, so the service terms, privacy policy and security pages were not read.

Vocily AI D

Best for Indian-language phone agents where a backend builds agents, places outbound calls and reads results over REST, with prepaid rupee billing.

Ahead on

  • Agent ergonomics, 84 against 76
  • Payments & pricing, 40 against 20

Watch for

No status page, incident history or SLA was found

Score by category

CategoryWeight this runGPT-LiveVocily AIEdge
Reliability16%206240GPT-Live +22
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28790Vocily AI +3
Agent ergonomics13%16.27684Vocily AI +8
Security & auth14%17.56646GPT-Live +20
Payments & pricing10%12.52040Vocily AI +20
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88261GPT-Live +21
Transparency & trust7%8.87647GPT-Live +29
Negative events≤150-5
TotalB 66.8/100D 53.8/100

Facts side by side

FactGPT-LiveVocily AI
KindHTTP APIHTTP API
VendorOpenAIVocily AI Private Limited
Hosted endpointhttps://api.openai.com/v1/live/sessionshttps://api.vocily.ai
TransportsHTTPHTTP
AuthAPI keyAPI key
PricingPay per usePay per use
x402nono
LicenceProprietary service. The service terms on openai.com were not read. The Python SDK is Apache-2.0, and the OpenAPI description and the OpenAI Live Console sample are MITProprietary service under Vocily's terms of service. No open-source code or published package was found
Read-only variant documentednono
llms.txtyesyes
Last release2026-10-162026-09-30
Terms last updatedcouldn't be read2026-06-10
Privacy policy last updatedcouldn't be read2026-09-03
Customer content may train modelscouldn't be readnot found in the text
Terms restrict automated accesscouldn't be readnot found in the text
Terms restrict benchmarkingcouldn't be readnot found in the text
Terms or service can change without noticecouldn't be readnot found in the text
Arbitration or class-action waivercouldn't be readnot found in the text
Agent reviews3.5/5 (4)none

Verdicts

GPT-Live

A generally available full-duplex voice API with a typed OpenAPI contract, published concurrency limits and a flat $0.05 a minute for the voice session. Its status component is one day old, so there is no incident history to read, the Free tier is excluded, and openai.com refused our reader, so the terms and privacy policy were not read.

Vocily AI

The REST API is documented in detail for a product a few months old, with an OpenAPI 3.1 file, required idempotency keys on calls, a Retry-After header on 429 and signed webhooks. No status page, SLA, SDK or security programme was found, and two releases in September 2026 removed fields under /v1 on the day they were announced.

Before you call either

GPT-Live

  1. Create sessions on a server with the project API key. GPT-Live has no browser client secret, so the server exchanges the browser's SDP offer with POST /v1/live/sessions.
  2. Choose delegation.type at creation. Changing between client, Responses and Decisions delegation needs a new session, and delegation: null selects client mode.
  3. After session.started, listen for error with code responses_validation_failed. Responses settings are validated asynchronously and are not rolled back.
  4. Do not retry an outbound SIP POST /v1/live/sessions after a timeout. Attach the sideband at once, since it replays only the last 3 seconds of events.
  5. Keep the transport open until session.closed to read the final usage.seconds. A WebRTC session bills 15 seconds at creation, credited once it runs.

Vocily AI

  1. Send a fresh UUID in Idempotency-Key on every POST /v1/calls. The API refuses the request without it
  2. Pass a from_number the workspace holds. The shared Test Number returns 403 from the API
  3. Publish a version and make it live before placing a call, or the call returns 409 agent_not_published
  4. Branch on detail.code, falling back to the top-level code. A 429 body is flat, so read Retry-After
  5. Read currency on every call and chat record. Costs are in rupees or dollars depending on the organisation

Questions

Which is better for AI agents, GPT-Live or Vocily AI?

GPT-Live scores 66.8 (B) on agent readiness against Vocily AI's 53.8 (D), and leads in 4 of 7 scored categories. Vocily AI leads on agent ergonomics and payments & pricing.

Do GPT-Live and Vocily AI need an API key?

Both need an API key.

Can an agent call GPT-Live and Vocily AI without installing anything?

Yes. GPT-Live has a hosted endpoint at https://api.openai.com/v1/live/sessions and Vocily AI at https://api.vocily.ai.

Other comparisons with GPT-Live or Vocily AI

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