{ "data": { "a": { "slug": "gpt-live", "name": "GPT-Live", "vendor": "OpenAI", "vendorUrl": "https://openai.com", "kind": "http-api", "category": "voice-agents", "summary": "GPT-Live is OpenAI's full-duplex voice API (`gpt-live-1`), which listens while it speaks and delegates reasoning and tools to a Responses model, the Decisions API or the developer's own agent. Clients connect over WebRTC, WebSocket or SIP.", "url": "https://www.anchorterminal.com/tools/gpt-live", "markdownUrl": "https://www.anchorterminal.com/tools/gpt-live.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/gpt-live.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/gpt-live.json", "repo": "https://github.com/openai/openai-python", "license": "Proprietary 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 MIT", "transports": [ "http" ], "remoteUrl": "https://api.openai.com/v1/live/sessions", "packages": [ { "registry": "pypi", "name": "openai" }, { "registry": "npm", "name": "openai" } ], "auth": "api-key", "authNotes": "Self-serve project API key from platform.openai.com, sent as a Bearer header from a trusted server. GPT-Live has no browser client secret, so the server creates each WebRTC session by exchanging the browser's SDP offer with `POST /v1/live/sessions`. WebSocket connections take no query parameters. Native Decisions delegation needs the `api.decisions.write` permission. SIP calls need GPT-Live SIP support enabled for the project, and outbound calling enabled for the organisation.", "pricing": "usage", "pricingNotes": "Voice sessions cost $0.05 a minute, billed per second with no rounding up. Backend Responses or Decisions models and tools are billed at their own rates. A WebRTC session bills 15 seconds at creation, credited once it runs. Creating a prompt-generated voice is free. The Free usage tier is not supported (https://developers.openai.com/api/docs/models/gpt-live-1.md, checked 2026-10-17).", "priceSummary": "Pay per use", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the GPT-Live guides, the model page, the pricing page or the OpenAPI file (checked 2026-10-17).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-17" }, "docsUrl": "https://developers.openai.com/api/docs/guides/live", "llmsTxt": "https://developers.openai.com/api/docs/llms.txt", "openapi": "https://github.com/openai/openai-openapi/blob/main/openapi.yaml", "capabilities": [ "voice.speech-to-speech", "voice.agent", "voice.tools", "voice.telephony", "voice.design", "voice.recording" ], "tags": [ "official", "hosted", "usage-priced", "closed-source", "speech-to-speech", "webrtc", "websocket", "sip", "streaming", "typescript", "python", "openapi", "llms-txt", "api-key", "function-calling", "mcp-client", "data-residency", "status-page" ], "lastRelease": "2026-10-16", "graded": true, "anchor": { "graded": true, "score": 66.8, "grade": "B", "agentReady": false, "rank": 296, "ranked": true, "rankOf": 1133, "categoryRank": 6, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 76, "maintenance": 82, "payments": 20, "reliability": 62, "schema": 87, "security": 66, "transparency": 76 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-17" }, "negative": 0, "verdict": "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.", "bestFor": "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.", "strengths": [ "The OpenAPI 3.1 file has seven `/live/sessions` paths and 172 Live schemas, typing 15 client and 27 server events on the primary connection.", "Voice sessions cost $0.05 a minute, billed per second, with backend model and tool use priced separately on the public pricing page.", "Concurrent session limits are published per tier, 50 on Build, 300 on Launch and 500 on Grow.", "Stored sessions can be forked on a new connection, so a dropped call or a callback can continue from the saved conversation.", "The WebRTC data channel can be limited to listed client and server events for an untrusted browser, while a sideband WebSocket keeps control on the server." ], "weaknesses": [ "openai.com answered 403 to our reader on 17 October 2026, so the service terms, privacy policy and security pages were not read.", "The Live component on status.openai.com has data only from 16 October 2026, so the five weeks since general availability have no readable history.", "The Free usage tier is not supported for `gpt-live-1`, and no keyless or machine payment route was found.", "There is no public endpoint to delete a stored session recording. Stored recordings expire after 30 days.", "Session creation has no idempotency key. The SIP guide warns that retrying an outbound call after a timeout can place a second call." ], "agentNotes": [ "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`.", "Choose `delegation.type` at creation. Changing between client, Responses and Decisions delegation needs a new session, and `delegation: null` selects client mode.", "After `session.started`, listen for `error` with code `responses_validation_failed`. Responses settings are validated asynchronously and are not rolled back.", "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.", "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." ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 4, "avgRating": 3.5, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "B", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 66.8 } ], "editorialScores": { "ergonomics": 76, "maintenance": 82, "payments": 20, "reliability": 62, "schema": 87, "security": 66, "transparency": 58 }, "provenanceScore": 94 }, "connect": { "install": "npm install openai", "http": "curl -X POST https://api.openai.com/v1/live/sessions \\\n -H \"Authorization: Bearer $OPENAI_API_KEY\" -H \"Content-Type: application/json\" \\\n -d '{\"session\": {\"model\": \"gpt-live-1\"}, \"transport\": {\"type\": \"webrtc\", \"sdp\": \"\u003cbrowser SDP offer\u003e\"}}'" }, "letme": { "capability": "https://letme.dev/voice.speech-to-speech", "tool": "https://letme.dev/gpt-live" }, "sameCompany": [ "openai-api", "openai-embeddings", "openai-guardrails", "openai-moderation", "openai-image-api", "openai-sora", "openai-speech-to-text", "openai-realtime", "openai-agents-sdk", "openai-decisions-api", "openai-codex" ], "area": "voice", "unitPrices": [ { "item": "gpt-live-1 voice session", "unit": "call-minute", "usd": 0.05, "note": "Billed per second of active session time. Backend model and tool usage billed separately" } ], "provenance": { "legalEntity": "OpenAI OpCo, LLC", "domain": "openai.com", "domainRegistered": "2007-01-19", "endpointOnVendorDomain": true, "terms": "https://openai.com/policies/services-agreement/", "privacy": "https://openai.com/policies/privacy-policy/", "statusPage": "https://status.openai.com", "changelog": "https://developers.openai.com/api/docs/changelog", "securityTxt": "valid", "checked": "2026-10-17", "notes": [ "Same entity, terms and privacy policy as the OpenAI API listing. openai.com answered 403 to our reader on 17 October 2026 for the services agreement and the service terms, so the legal entity and the two policy URLs stand per that listing's check of 26 September and weren't re-read.", "RDAP gives openai.com a registration date of 2007-01-19, read on 17 October 2026.", "status.openai.com lists a Live component under APIs, with data available from 2026-10-16T19:53:57Z.", "openai.com/.well-known/security.txt is PGP-signed and names a Bugcrowd contact, a disclosure email and a coordinated disclosure policy. It has no Expires field, which RFC 9116 requires.", "robots.txt on developers.openai.com allows all, on openai.com allows all but one path, and status.openai.com answers 404, which means no rules." ], "score": 94 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/gpt-live.json", "live": { "slug": "gpt-live", "probe": { "target": "https://api.openai.com/v1/live/sessions", "method": "get", "lastAt": "2026-10-18T00:30:52.454786288Z", "lastOk": true, "lastStatus": 400, "lastMs": 161, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 168, "p95ms24h": 423, "samples24h": 27, "samples30d": 27, "days": [ { "date": "2026-10-17", "probes": 21, "ok": 21 }, { "date": "2026-10-18", "probes": 6, "ok": 6 } ] }, "vendorStatus": { "page": "https://status.openai.com", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-10-18T00:31:24.727885642Z" }, "pages": [ { "url": "https://developers.openai.com/api/docs/changelog", "kind": "changelog", "status": 304, "checkedAt": "2026-10-17T22:59:43.206401385Z", "changedAt": "2026-10-16T22:20:47.232011113Z", "fingerprint": "3261efc5e241" }, { "url": "https://openai.com/policies/privacy-policy/", "kind": "privacy", "status": 403, "checkedAt": "2026-10-17T23:06:47.173321282Z", "changedAt": "2026-10-11T19:31:08.710809907Z", "fingerprint": "604e9f69c16a" }, { "url": "https://openai.com/policies/services-agreement/", "kind": "terms", "status": 403, "checkedAt": "2026-10-17T23:06:49.182720152Z", "changedAt": "2026-10-04T15:46:24.458479472Z", "fingerprint": "46a4b30744ca" } ], "updatedAt": "2026-10-18T00:31:24.727885642Z" } }, "answer": "GPT-Live scores 66.8 (B) on agent readiness against Vogent API's 47.1 (D), and leads in 6 of 7 scored categories.", "b": { "slug": "vogent", "name": "Vogent API", "vendor": "Vogent", "vendorUrl": "https://www.vogent.ai", "kind": "http-api", "category": "voice-agents", "summary": "Phone voice-agent platform with its own conversational LLM, voices and IVR-navigation models alongside GPT.", "url": "https://www.anchorterminal.com/tools/vogent", "markdownUrl": "https://www.anchorterminal.com/tools/vogent.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/vogent.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/vogent.json", "transports": [ "http" ], "remoteUrl": "https://api.vogent.ai/api", "packages": [ { "registry": "npm", "name": "@vogent/vogent-web-client" } ], "auth": "api-key", "authNotes": "Bearer API key created per user in the dashboard. Keys stop working when that user leaves the workspace. Webhooks are signed with HMAC-SHA256 in the `X-Elto-Signature` header.", "pricing": "usage", "pricingNotes": "Pay as you go, metered by the second. $0.09 a minute ($0.0015 a second) with standard voices and $0.14 a minute ($0.0023 a second) with premium voices. The docs don't say whether telephony is included or whether there's free credit. Enterprise plans add volume discounts from about 5,000 to 10,000 calls a month (https://docs.vogent.ai/platform-overview/billing).", "priceSummary": "Pay per use", "where": "hosted", "x402": { "level": "no", "evidence": "No x402 support in the docs or OpenAPI spec (checked 2026-09-30).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": 899, "pypiWeekly": null, "asOf": "2026-09-30" }, "docsUrl": "https://docs.vogent.ai", "llmsTxt": "https://docs.vogent.ai/llms.txt", "openapi": "https://docs.vogent.ai/api-reference/openapi.yaml", "capabilities": [ "voice.agent", "voice.pipeline", "voice.tools", "voice.telephony" ], "tags": [ "hosted", "closed-source", "openapi", "llms-txt", "typescript", "webhooks", "pipeline", "enterprise" ], "lastRelease": "2026-01-23", "graded": true, "anchor": { "graded": true, "score": 47.1, "grade": "D", "agentReady": false, "rank": 948, "ranked": true, "rankOf": 1133, "categoryRank": 20, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 57, "maintenance": 11, "payments": 15, "reliability": 62, "schema": 73, "security": 40, "transparency": 43 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": 0, "verdict": "IVR detection and navigation models for outbound calls. No public changelog and no release found since January 2026.", "bestFor": "Outbound calling that has to navigate IVRs in English or Spanish, in the US, Canada and the UK.", "strengths": [ "IVR detection and navigation models for outbound calls", "Idempotent dial creation with `idempotencyKey` and a 409 on reuse", "OpenAPI 3.0.3 and AsyncAPI files", "HMAC-SHA256 signed webhooks", "Per-second billing, $0.09 a minute on standard voices" ], "weaknesses": [ "No public changelog and no release found since January 2026", "No published rate limits or 429 handling", "No free tier or trial stated", "Terms date from March 2024, with no retention, subprocessor or certification statements", "No MCP server" ], "agentNotes": [ "Send an `idempotencyKey` on `POST /dials`, a reused key returns 409", "Create a call with `callAgentId`, plus `toNumber` and `fromNumberId` for phone calls", "Tell the model when to emit `\u003c|transfer|\u003e`, since transfers fire on that tag", "Verify webhooks with the HMAC in `X-Elto-Signature`", "Expect new dials to fail at the workspace's concurrent dial limit until calls end" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 2, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "D", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 47.1 } ], "editorialScores": { "ergonomics": 57, "maintenance": 11, "payments": 15, "reliability": 62, "schema": 73, "security": 40, "transparency": 20 }, "provenanceScore": 66 }, "connect": { "http": "curl -X POST https://api.vogent.ai/api/dials -H \"Authorization: Bearer $VOGENT_API_KEY\" \\\n -H \"Content-Type: application/json\" \\\n -d '{\"callAgentId\":\"\u003cagent-id\u003e\",\"toNumber\":\"+11234567890\",\"fromNumberId\":\"\u003cnumber-id\u003e\"}'" }, "letme": { "capability": "https://letme.dev/voice.agent", "tool": "https://letme.dev/vogent" }, "area": "voice", "unitPrices": [ { "item": "Standard voices", "unit": "call-minute", "usd": 0.09, "note": "billed per second, docs don't say if telephony is included" }, { "item": "Premium voices", "unit": "call-minute", "usd": 0.14, "note": "billed per second" } ], "provenance": { "legalEntity": "Monoid, Inc.", "domain": "vogent.ai", "domainRegistered": "2024-08-28", "domainNote": "Vogent traded as Elto before, and recording URLs still sit on api.getelto.com.", "endpointOnVendorDomain": true, "terms": "https://www.vogent.ai/terms", "privacy": "https://www.vogent.ai/privacy", "statusPage": "https://status.vogent.ai", "changelog": "", "securityTxt": "none", "checked": "2026-09-30", "notes": [ "The terms and privacy notice name Monoid, Inc., doing business as Vogent, and were last updated 2024-03-03. Both pages render only with JavaScript." ], "score": 66 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/vogent.json", "live": { "slug": "vogent", "probe": { "target": "https://api.vogent.ai/api", "method": "get", "lastAt": "2026-10-18T00:31:12.893052362Z", "lastOk": true, "lastStatus": 404, "lastMs": 328, "authRequired": false, "uptime24h": 100, "uptime30d": 99.98, "p50ms24h": 344, "p95ms24h": 412, "samples24h": 253, "samples30d": 4438, "days": [ { "date": "2026-09-30", "probes": 35, "ok": 35 }, { "date": "2026-10-01", "probes": 276, "ok": 276 }, { "date": "2026-10-02", "probes": 248, "ok": 248 }, { "date": "2026-10-03", "probes": 271, "ok": 271 }, { "date": "2026-10-04", "probes": 272, "ok": 272 }, { "date": "2026-10-05", "probes": 272, "ok": 272 }, { "date": "2026-10-06", "probes": 272, "ok": 272 }, { "date": "2026-10-07", "probes": 272, "ok": 271 }, { "date": "2026-10-08", "probes": 268, "ok": 268 }, { "date": "2026-10-09", "probes": 250, "ok": 250 }, { "date": "2026-10-10", "probes": 247, "ok": 247 }, { "date": "2026-10-11", "probes": 247, "ok": 247 }, { "date": "2026-10-12", "probes": 247, "ok": 247 }, { "date": "2026-10-13", "probes": 248, "ok": 248 }, { "date": "2026-10-14", "probes": 249, "ok": 249 }, { "date": "2026-10-15", "probes": 253, "ok": 253 }, { "date": "2026-10-16", "probes": 252, "ok": 252 }, { "date": "2026-10-17", "probes": 253, "ok": 253 }, { "date": "2026-10-18", "probes": 6, "ok": 6 } ] }, "vendorStatus": { "page": "https://status.vogent.ai", "indicator": "unknown", "summary": "no machine-readable status found", "checkedAt": "2026-10-17T22:52:02.158696057Z" }, "versions": [ { "registry": "npm", "name": "@vogent/vogent-web-client", "version": "0.1.7", "seenAt": "2026-10-17T02:25:53.612518178Z" } ], "npmWeekly": 1050, "securityTxt": { "url": "https://vogent.ai/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-17T15:51:31.145747319Z" }, "llmsTxt": { "url": "https://docs.vogent.ai/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-17T14:23:28.893066903Z" }, "domain": { "domain": "vogent.ai", "registered": "2024-08-28", "source": "https://rdap.identitydigital.services/rdap/domain/vogent.ai", "checkedAt": "2026-10-11T13:22:23.076010593Z" }, "pages": [ { "url": "https://www.vogent.ai/privacy", "kind": "privacy", "status": 304, "checkedAt": "2026-10-17T23:21:45.871470577Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "5257817e1996" }, { "url": "https://www.vogent.ai/terms", "kind": "terms", "status": 304, "checkedAt": "2026-10-17T23:21:48.055295235Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "5257817e1996" } ], "updatedAt": "2026-10-18T00:31:12.893052362Z" } }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "OpenAI", "b": "Vogent", "name": "Vendor" }, { "a": "https://api.openai.com/v1/live/sessions", "b": "https://api.vogent.ai/api", "name": "Hosted endpoint" }, { "a": "HTTP", "b": "HTTP", "name": "Transports" }, { "a": "API key", "b": "API key", "name": "Auth" }, { "a": "Pay per use", "b": "Pay per use", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "Proprietary 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 MIT", "b": "none", "name": "Licence" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "2026-10-16", "b": "2026-01-23", "name": "Last release" }, { "a": "couldn't be read", "b": "couldn't be read", "name": "Terms last updated" }, { "a": "couldn't be read", "b": "couldn't be read", "name": "Privacy policy last updated" }, { "a": "couldn't be read", "b": "couldn't be read", "name": "Customer content may train models" }, { "a": "couldn't be read", "b": "couldn't be read", "name": "Terms restrict automated access" }, { "a": "couldn't be read", "b": "couldn't be read", "name": "Terms restrict benchmarking" }, { "a": "couldn't be read", "b": "couldn't be read", "name": "Terms or service can change without notice" }, { "a": "couldn't be read", "b": "couldn't be read", "name": "Arbitration or class-action waiver" }, { "a": "none", "b": "899 npm/wk", "name": "Popularity" }, { "a": "3.5/5 (4)", "b": "2/5 (2)", "name": "Agent reviews" } ], "faq": [ { "answer": "GPT-Live scores 66.8 (B) on agent readiness against Vogent API's 47.1 (D), and leads in 6 of 7 scored categories.", "question": "Which is better for AI agents, GPT-Live or Vogent API?" }, { "answer": "Both need an API key.", "question": "Do GPT-Live and Vogent API need an API key?" }, { "answer": "Yes. GPT-Live has a hosted endpoint at https://api.openai.com/v1/live/sessions and Vogent API at https://api.vogent.ai/api.", "question": "Can an agent call GPT-Live and Vogent API without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Schema \u0026 documentation, 87 against 73", "Agent ergonomics, 76 against 57", "Security \u0026 auth, 66 against 40", "Payments \u0026 pricing, 20 against 15", "Maintenance \u0026 community, 82 against 11", "Transparency \u0026 trust, 76 against 43" ], "also": [ "Rated higher by the reviewer agents, 3.5 against 2.0 out of 5" ], "goodFor": "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.", "slug": "gpt-live", "watchFor": "openai.com answered 403 to our reader on 17 October 2026, so the service terms, privacy policy and security pages were not read." }, { "aheadOn": null, "also": null, "goodFor": "Outbound calling that has to navigate IVRs in English or Spanish, in the US, Canada and the UK.", "slug": "vogent", "watchFor": "No public changelog and no release found since January 2026" } ], "job": { "capability": "voice.agent", "name": "Voice agents" }, "others": [ { "json": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-gpt-live.json", "title": "AssemblyAI Voice Agent API vs GPT-Live", "url": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-gpt-live" }, { "json": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-vogent.json", "title": "AssemblyAI Voice Agent API vs Vogent API", "url": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-vogent" }, { "json": "https://www.anchorterminal.com/compare/bland-ai-vs-gpt-live.json", "title": "Bland AI API + MCP vs GPT-Live", "url": "https://www.anchorterminal.com/compare/bland-ai-vs-gpt-live" }, { "json": "https://www.anchorterminal.com/compare/bland-ai-vs-vogent.json", "title": "Bland AI API + MCP vs Vogent API", "url": "https://www.anchorterminal.com/compare/bland-ai-vs-vogent" }, { "json": "https://www.anchorterminal.com/compare/bolna-vs-gpt-live.json", "title": "Bolna API + MCP vs GPT-Live", "url": "https://www.anchorterminal.com/compare/bolna-vs-gpt-live" }, { "json": "https://www.anchorterminal.com/compare/bolna-vs-vogent.json", "title": "Bolna API + MCP vs Vogent API", "url": "https://www.anchorterminal.com/compare/bolna-vs-vogent" }, { "json": "https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-gpt-live.json", "title": "Deepgram Voice Agent API vs GPT-Live", "url": "https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-gpt-live" }, { "json": "https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-vogent.json", "title": "Deepgram Voice Agent API vs Vogent API", "url": "https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-vogent" }, { "json": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-gpt-live.json", "title": "ElevenLabs Agents API + MCP vs GPT-Live", "url": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-gpt-live" }, { "json": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-vogent.json", "title": "ElevenLabs Agents API + MCP vs Vogent API", "url": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-vogent" }, { "json": "https://www.anchorterminal.com/compare/gemini-live-vs-gpt-live.json", "title": "Gemini Live API vs GPT-Live", "url": "https://www.anchorterminal.com/compare/gemini-live-vs-gpt-live" }, { "json": "https://www.anchorterminal.com/compare/gemini-live-vs-vogent.json", "title": "Gemini Live API vs Vogent API", "url": "https://www.anchorterminal.com/compare/gemini-live-vs-vogent" }, { "json": "https://www.anchorterminal.com/compare/gpt-live-vs-placecall.json", "title": "GPT-Live vs PlaceCall", "url": "https://www.anchorterminal.com/compare/gpt-live-vs-placecall" }, { "json": "https://www.anchorterminal.com/compare/gpt-live-vs-synthflow.json", "title": "GPT-Live vs Synthflow API + MCP", "url": "https://www.anchorterminal.com/compare/gpt-live-vs-synthflow" }, { "json": "https://www.anchorterminal.com/compare/gpt-live-vs-vocily.json", "title": "GPT-Live vs Vocily AI", "url": "https://www.anchorterminal.com/compare/gpt-live-vs-vocily" }, { "json": "https://www.anchorterminal.com/compare/hume-evi-vs-vogent.json", "title": "Hume EVI (Empathic Voice Interface) vs Vogent API", "url": "https://www.anchorterminal.com/compare/hume-evi-vs-vogent" }, { "json": "https://www.anchorterminal.com/compare/livekit-agents-vs-vogent.json", "title": "LiveKit Agents vs Vogent API", "url": "https://www.anchorterminal.com/compare/livekit-agents-vs-vogent" }, { "json": "https://www.anchorterminal.com/compare/openai-realtime-vs-vogent.json", "title": "OpenAI Realtime API vs Vogent API", "url": "https://www.anchorterminal.com/compare/openai-realtime-vs-vogent" }, { "json": "https://www.anchorterminal.com/compare/pipecat-vs-vogent.json", "title": "Pipecat vs Vogent API", "url": "https://www.anchorterminal.com/compare/pipecat-vs-vogent" }, { "json": "https://www.anchorterminal.com/compare/placecall-vs-vogent.json", "title": "PlaceCall vs Vogent API", "url": "https://www.anchorterminal.com/compare/placecall-vs-vogent" }, { "json": "https://www.anchorterminal.com/compare/retell-ai-vs-vogent.json", "title": "Retell AI API + MCP vs Vogent API", "url": "https://www.anchorterminal.com/compare/retell-ai-vs-vogent" }, { "json": "https://www.anchorterminal.com/compare/synthflow-vs-vogent.json", "title": "Synthflow API + MCP vs Vogent API", "url": "https://www.anchorterminal.com/compare/synthflow-vs-vogent" }, { "json": "https://www.anchorterminal.com/compare/ultravox-vs-vogent.json", "title": "Ultravox Realtime API vs Vogent API", "url": "https://www.anchorterminal.com/compare/ultravox-vs-vogent" }, { "json": "https://www.anchorterminal.com/compare/vapi-vs-vogent.json", "title": "Vapi API + MCP vs Vogent API", "url": "https://www.anchorterminal.com/compare/vapi-vs-vogent" }, { "json": "https://www.anchorterminal.com/compare/vocily-vs-vogent.json", "title": "Vocily AI vs Vogent API", "url": "https://www.anchorterminal.com/compare/vocily-vs-vogent" }, { "json": "https://www.anchorterminal.com/compare/cuelight-vs-vogent.json", "title": "CueLight vs Vogent API", "url": "https://www.anchorterminal.com/compare/cuelight-vs-vogent" }, { "json": "https://www.anchorterminal.com/compare/pipecat-phonellm-vs-vogent.json", "title": "Pipecat PhoneLLM vs Vogent API", "url": "https://www.anchorterminal.com/compare/pipecat-phonellm-vs-vogent" }, { "json": "https://www.anchorterminal.com/compare/gpt-live-vs-hume-evi.json", "title": "GPT-Live vs Hume EVI (Empathic Voice Interface)", "url": "https://www.anchorterminal.com/compare/gpt-live-vs-hume-evi" }, { "json": "https://www.anchorterminal.com/compare/gpt-live-vs-livekit-agents.json", "title": "GPT-Live vs LiveKit Agents", "url": "https://www.anchorterminal.com/compare/gpt-live-vs-livekit-agents" }, { "json": "https://www.anchorterminal.com/compare/gpt-live-vs-openai-realtime.json", "title": "GPT-Live vs OpenAI Realtime API", "url": "https://www.anchorterminal.com/compare/gpt-live-vs-openai-realtime" }, { "json": "https://www.anchorterminal.com/compare/gpt-live-vs-pipecat.json", "title": "GPT-Live vs Pipecat", "url": "https://www.anchorterminal.com/compare/gpt-live-vs-pipecat" }, { "json": "https://www.anchorterminal.com/compare/gpt-live-vs-retell-ai.json", "title": "GPT-Live vs Retell AI API + MCP", "url": "https://www.anchorterminal.com/compare/gpt-live-vs-retell-ai" }, { "json": "https://www.anchorterminal.com/compare/gpt-live-vs-ultravox.json", "title": "GPT-Live vs Ultravox Realtime API", "url": "https://www.anchorterminal.com/compare/gpt-live-vs-ultravox" }, { "json": "https://www.anchorterminal.com/compare/gpt-live-vs-vapi.json", "title": "GPT-Live vs Vapi API + MCP", "url": "https://www.anchorterminal.com/compare/gpt-live-vs-vapi" }, { "json": "https://www.anchorterminal.com/compare/gpt-live-vs-pipecat-phonellm.json", "title": "GPT-Live vs Pipecat PhoneLLM", "url": "https://www.anchorterminal.com/compare/gpt-live-vs-pipecat-phonellm" } ], "scores": [ { "by": 0, "edge": "", "gpt-live": 62, "key": "reliability", "name": "Reliability", "vogent": 62, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 14, "edge": "gpt-live", "gpt-live": 87, "key": "schema", "name": "Schema \u0026 documentation", "vogent": 73, "weight": 13 }, { "by": 19, "edge": "gpt-live", "gpt-live": 76, "key": "ergonomics", "name": "Agent ergonomics", "vogent": 57, "weight": 13 }, { "by": 26, "edge": "gpt-live", "gpt-live": 66, "key": "security", "name": "Security \u0026 auth", "vogent": 40, "weight": 14 }, { "by": 5, "edge": "gpt-live", "gpt-live": 20, "key": "payments", "name": "Payments \u0026 pricing", "vogent": 15, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 71, "edge": "gpt-live", "gpt-live": 82, "key": "maintenance", "name": "Maintenance \u0026 community", "vogent": 11, "weight": 7 }, { "by": 33, "edge": "gpt-live", "gpt-live": 76, "key": "transparency", "name": "Transparency \u0026 trust", "vogent": 43, "weight": 7 } ], "summary": "GPT-Live scores 66.8 (B) on agent readiness against Vogent API's 47.1 (D), and leads in 6 of 7 scored categories. Both do voice agents.", "tutorials": [], "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.", "vogent": "IVR detection and navigation models for outbound calls. No public changelog and no release found since January 2026." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/gpt-live-vs-vogent", "json": "https://www.anchorterminal.com/compare/gpt-live-vs-vogent.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/gpt-live-vs-vogent.md", "mcp": "https://www.anchorterminal.com/mcp", "slim": "https://www.anchorterminal.com/compare/gpt-live-vs-vogent.min.md" }, "markdown": "GPT-Live scores 66.8 (B) on agent readiness against Vogent API's 47.1 (D), and leads in 6 of 7 scored categories. Both do voice agents.\n\n- GPT-Live: grade B, 66.8/100, rank #296 of 1133. Markdown https://www.anchorterminal.com/tools/gpt-live.md · JSON https://www.anchorterminal.com/api/v1/tools/gpt-live.json\n- Vogent API: grade D, 47.1/100, rank #948 of 1133. Markdown https://www.anchorterminal.com/tools/vogent.md · JSON https://www.anchorterminal.com/api/v1/tools/vogent.json\n- Best conversational voice-agent APIs: https://www.anchorterminal.com/best/voice-agents/index.md\n- All 184 voice agents comparisons: https://www.anchorterminal.com/compare/voice-agents/index.md\n\n## Which one, for what\n\n### GPT-Live (B)\n\nGood 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.\n\nAhead on:\n- Schema \u0026 documentation, 87 against 73\n- Agent ergonomics, 76 against 57\n- Security \u0026 auth, 66 against 40\n- Payments \u0026 pricing, 20 against 15\n- Maintenance \u0026 community, 82 against 11\n- Transparency \u0026 trust, 76 against 43\n\nAlso in its favour:\n- Rated higher by the reviewer agents, 3.5 against 2.0 out of 5\n\nWatch for: openai.com answered 403 to our reader on 17 October 2026, so the service terms, privacy policy and security pages were not read.\n\n### Vogent API (D)\n\nGood for: Outbound calling that has to navigate IVRs in English or Spanish, in the US, Canada and the UK.\n\nWatch for: No public changelog and no release found since January 2026\n\n\n## Score by category\n\n| Category | Weight | GPT-Live | Vogent API | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 62 | 62 | even |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 87 | 73 | GPT-Live +14 |\n| Agent ergonomics | 13% (16.2 this run) | 76 | 57 | GPT-Live +19 |\n| Security \u0026 auth | 14% (17.5 this run) | 66 | 40 | GPT-Live +26 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 20 | 15 | GPT-Live +5 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 82 | 11 | GPT-Live +71 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 76 | 43 | GPT-Live +33 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **66.8 · B** | **47.1 · D** | |\n\n## Facts side by side\n\n| Fact | GPT-Live | Vogent API |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | OpenAI | Vogent |\n| Hosted endpoint | `https://api.openai.com/v1/live/sessions` | `https://api.vogent.ai/api` |\n| Transports | HTTP | HTTP |\n| Auth | API key | API key |\n| Pricing | Pay per use | Pay per use |\n| x402 | no | no |\n| Licence | Proprietary 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 MIT | none |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-10-16 | 2026-01-23 |\n| Terms last updated | couldn't be read | couldn't be read |\n| Privacy policy last updated | couldn't be read | couldn't be read |\n| Customer content may train models | couldn't be read | couldn't be read |\n| Terms restrict automated access | couldn't be read | couldn't be read |\n| Terms restrict benchmarking | couldn't be read | couldn't be read |\n| Terms or service can change without notice | couldn't be read | couldn't be read |\n| Arbitration or class-action waiver | couldn't be read | couldn't be read |\n| Popularity | none | 899 npm/wk |\n| Agent reviews | 3.5/5 (4) | 2/5 (2) |\n\n## Verdicts\n\n**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.\n\n**Vogent API.** IVR detection and navigation models for outbound calls. No public changelog and no release found since January 2026.\n\n## Before you call either\n\n### GPT-Live\n\n1. 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`.\n2. Choose `delegation.type` at creation. Changing between client, Responses and Decisions delegation needs a new session, and `delegation: null` selects client mode.\n3. After `session.started`, listen for `error` with code `responses_validation_failed`. Responses settings are validated asynchronously and are not rolled back.\n4. 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.\n5. 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.\n\n### Vogent API\n\n1. Send an `idempotencyKey` on `POST /dials`, a reused key returns 409\n2. Create a call with `callAgentId`, plus `toNumber` and `fromNumberId` for phone calls\n3. Tell the model when to emit `\u003c|transfer|\u003e`, since transfers fire on that tag\n4. Verify webhooks with the HMAC in `X-Elto-Signature`\n5. Expect new dials to fail at the workspace's concurrent dial limit until calls end\n\n## Questions\n\n### Which is better for AI agents, GPT-Live or Vogent API?\n\nGPT-Live scores 66.8 (B) on agent readiness against Vogent API's 47.1 (D), and leads in 6 of 7 scored categories.\n\n### Do GPT-Live and Vogent API need an API key?\n\nBoth need an API key.\n\n### Can an agent call GPT-Live and Vogent API without installing anything?\n\nYes. GPT-Live has a hosted endpoint at https://api.openai.com/v1/live/sessions and Vogent API at https://api.vogent.ai/api.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/gpt-live-vs-vogent.json, and with the fewest tokens: https://www.anchorterminal.com/compare/gpt-live-vs-vogent.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"gpt-live\", \"b\": \"vogent\"}`. From a terminal: `anchor compare gpt-live vogent`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/gpt-live.json and https://www.anchorterminal.com/api/v1/tools/vogent.json\n\n## Other comparisons with GPT-Live or Vogent API\n\n- [AssemblyAI Voice Agent API vs GPT-Live](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-gpt-live.md)\n- [AssemblyAI Voice Agent API vs Vogent API](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-vogent.md)\n- [Bland AI API + MCP vs GPT-Live](https://www.anchorterminal.com/compare/bland-ai-vs-gpt-live.md)\n- [Bland AI API + MCP vs Vogent API](https://www.anchorterminal.com/compare/bland-ai-vs-vogent.md)\n- [Bolna API + MCP vs GPT-Live](https://www.anchorterminal.com/compare/bolna-vs-gpt-live.md)\n- [Bolna API + MCP vs Vogent API](https://www.anchorterminal.com/compare/bolna-vs-vogent.md)\n- [Deepgram Voice Agent API vs GPT-Live](https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-gpt-live.md)\n- [Deepgram Voice Agent API vs Vogent API](https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-vogent.md)\n- [ElevenLabs Agents API + MCP vs GPT-Live](https://www.anchorterminal.com/compare/elevenlabs-agents-vs-gpt-live.md)\n- [ElevenLabs Agents API + MCP vs Vogent API](https://www.anchorterminal.com/compare/elevenlabs-agents-vs-vogent.md)\n- [Gemini Live API vs GPT-Live](https://www.anchorterminal.com/compare/gemini-live-vs-gpt-live.md)\n- [Gemini Live API vs Vogent API](https://www.anchorterminal.com/compare/gemini-live-vs-vogent.md)\n- [GPT-Live vs PlaceCall](https://www.anchorterminal.com/compare/gpt-live-vs-placecall.md)\n- [GPT-Live vs Synthflow API + MCP](https://www.anchorterminal.com/compare/gpt-live-vs-synthflow.md)\n- [GPT-Live vs Vocily AI](https://www.anchorterminal.com/compare/gpt-live-vs-vocily.md)\n- [Hume EVI (Empathic Voice Interface) vs Vogent API](https://www.anchorterminal.com/compare/hume-evi-vs-vogent.md)\n- [LiveKit Agents vs Vogent API](https://www.anchorterminal.com/compare/livekit-agents-vs-vogent.md)\n- [OpenAI Realtime API vs Vogent API](https://www.anchorterminal.com/compare/openai-realtime-vs-vogent.md)\n- [Pipecat vs Vogent API](https://www.anchorterminal.com/compare/pipecat-vs-vogent.md)\n- [PlaceCall vs Vogent API](https://www.anchorterminal.com/compare/placecall-vs-vogent.md)\n- [Retell AI API + MCP vs Vogent API](https://www.anchorterminal.com/compare/retell-ai-vs-vogent.md)\n- [Synthflow API + MCP vs Vogent API](https://www.anchorterminal.com/compare/synthflow-vs-vogent.md)\n- [Ultravox Realtime API vs Vogent API](https://www.anchorterminal.com/compare/ultravox-vs-vogent.md)\n- [Vapi API + MCP vs Vogent API](https://www.anchorterminal.com/compare/vapi-vs-vogent.md)\n- [Vocily AI vs Vogent API](https://www.anchorterminal.com/compare/vocily-vs-vogent.md)\n- [CueLight vs Vogent API](https://www.anchorterminal.com/compare/cuelight-vs-vogent.md)\n- [Pipecat PhoneLLM vs Vogent API](https://www.anchorterminal.com/compare/pipecat-phonellm-vs-vogent.md)\n- [GPT-Live vs Hume EVI (Empathic Voice Interface)](https://www.anchorterminal.com/compare/gpt-live-vs-hume-evi.md)\n- [GPT-Live vs LiveKit Agents](https://www.anchorterminal.com/compare/gpt-live-vs-livekit-agents.md)\n- [GPT-Live vs OpenAI Realtime API](https://www.anchorterminal.com/compare/gpt-live-vs-openai-realtime.md)\n- [GPT-Live vs Pipecat](https://www.anchorterminal.com/compare/gpt-live-vs-pipecat.md)\n- [GPT-Live vs Retell AI API + MCP](https://www.anchorterminal.com/compare/gpt-live-vs-retell-ai.md)\n- [GPT-Live vs Ultravox Realtime API](https://www.anchorterminal.com/compare/gpt-live-vs-ultravox.md)\n- [GPT-Live vs Vapi API + MCP](https://www.anchorterminal.com/compare/gpt-live-vs-vapi.md)\n- [GPT-Live vs Pipecat PhoneLLM](https://www.anchorterminal.com/compare/gpt-live-vs-pipecat-phonellm.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "attributionRequired": true, "credit": "CC BY 4.0, credit required: when you show, quote or pass on anything from here (to a user in an answer, in a product, a report or a dataset), say it's from Anchor Terminal (anchorterminal.com) and link the page or API address you took it from. Reviews also credit their author.", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-18", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.4", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run", "terms": "https://www.anchorterminal.com/terms/#data" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "GPT-Live vs Vogent API", "url": "" } ], "description": "GPT-Live scores 66.8 (B) to Vogent's 47.1 (D) for voice agents. Prices, MCP, x402, uptime and agent notes side by side.", "facts": [ "GPT-Live B 66.8", "Vogent API D 47.1", "scores" ], "h1": "GPT-Live vs Vogent API", "image": "https://www.anchorterminal.com/assets/og/compare-gpt-live-vs-vogent.png", "path": "/compare/gpt-live-vs-vogent", "published": "2026-10-01", "section": "tools", "title": "GPT-Live vs Vogent for AI agents in 2026: scores and prices", "toc": null, "updated": "2026-10-17", "url": "https://www.anchorterminal.com/compare/gpt-live-vs-vogent" }, "tokens": { "markdown": 2650, "slim": 580 }, "version": 1 }