{"schema":"postcutoff/event@1","as_of":"2026-10-14T22:23:00+02:00","url":"https://postcutoff.com/e/2026-10-14-grok-voice-3/","md":"https://postcutoff.com/e/2026-10-14-grok-voice-3/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"id":"2026-10-14-grok-voice-3","date":"2026-10-14","date_precision":"day","short_title":"SpaceXSI releases Grok Voice 3.0, topping Artificial Analysis' speech-to-speech index at $0.08/min","deck":null,"takeaway":"On Oct 14, 2026 SpaceXSI (formerly xAI) released Grok Voice 3.0, a speech-to-speech model for its Voice Agent API.","category":"model-release","category_label":"Model releases","importance":3,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":[{"n":1,"title":"SpaceXSI: Introducing Grok Voice 3.0","url":"https://x.ai/news/grok-voice-3","type":"official","group":"primary","domain":"x.ai"},{"n":2,"title":"xAI docs: Voice Agent API","url":"https://docs.x.ai/developers/model-capabilities/audio/voice-agent","type":"docs","group":"primary","domain":"docs.x.ai"}],"official":2,"filed":"2026-10-14","updated":"2026-10-14","orgs":["SpaceXSI","xAI"],"title":"SpaceXSI releases Grok Voice 3.0, topping Artificial Analysis' speech-to-speech index at $0.08/min","summary":"On Oct 14, 2026 SpaceXSI (formerly xAI) released Grok Voice 3.0, a speech-to-speech model for its Voice Agent API. It scores 86.9 on Artificial Analysis' Speech-to-Speech Index (Oct 13 data), ahead of OpenAI's GPT-Live-1 (83.2) and Gemini 3.8 Live (82.6), answers in under a second and keeps Grok Voice 2.0's price of $0.08 per minute. The grok-voice-latest alias was switched to 3.0 automatically.","key_facts":["Artificial Analysis Speech-to-Speech Index: 86.9 (Grok Voice 2.0: 81.3; GPT-Live-1: 83.2; Gemini 3.8 Live: 82.6), as reported by SpaceXSI with Oct 13 data","Big Bench Audio 98.5%; Speech Agent Arena Elo 1070; task success 94.8%; Full Duplex Bench 97.0%; τ-Voice 71.6% (2.0: 56.5%); ServiceNow EVA-Bench 74% accuracy","Latency: under one second; on τ-Voice, 40% lower latency than GPT-Live-1 (Astra, Medium)","Price: $0.08/min ($4.80/hour), unchanged from 2.0; cost per Big Bench Audio task $0.025 vs $0.030 for GPT-Live-1 and $0.055 for GPT-Realtime-2.1","API: Voice Agent API; agents on grok-voice-latest moved to 3.0 automatically; no pinned versioned model id is given on the announcement page","Deployment claim: Starlink call centres take about 20,000 calls a day in several languages with Grok Voice; about 70% resolved without a human and about one in four sales calls ends in a purchase"],"key_numbers":[],"tags":["voice","speech-to-speech","realtime","api","grok","benchmarks","voice-agents"],"science":null,"body_md":"## What happened\n\nTwo and a half months after Grok Voice Think Fast 2.0, SpaceXSI shipped version 3.0 of its realtime voice model. All\nbenchmark numbers come from SpaceXSI's announcement; the Artificial Analysis leaderboard itself was not opened for this entry.\n\n## Why it matters\n\nRealtime voice is the interface for call centres and in-car assistants. A same-price upgrade that claims the top independent\nspeech-to-speech score raises pressure on OpenAI's GPT-Live and Google's Gemini Live pricing.","disputed":[],"related":[{"id":"2026-07-29-grok-voice-think-fast-2","url":"https://postcutoff.com/e/2026-07-29-grok-voice-think-fast-2/","date":"2026-07-29","date_precision":"day","short_title":"xAI releases Grok Voice Think Fast 2.0 speech-to-speech model for voice agents","deck":null,"takeaway":"Its reported AA S2S Quality Index (82.9) put it roughly level with Google's Gemini 3.8 Live Extended Thinking (82.6, Sept 2026) and marked xAI's push to compete on voice agents on price.","category":"model-release","category_label":"Model releases","importance":3,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":4,"official":4,"filed":"2026-09-29","updated":"2026-09-29","orgs":["xAI","SpaceX"]},{"id":"2026-07-08-openai-gpt-live-chatgpt-voice","url":"https://postcutoff.com/e/2026-07-08-openai-gpt-live-chatgpt-voice/","date":"2026-07-08","date_precision":"day","short_title":"OpenAI launches GPT-Live, full-duplex voice models replacing ChatGPT's Advanced Voice Mode","deck":null,"takeaway":"ChatGPT's default voice experience moved to a full-duplex model with a separate \"thinker\" behind it, narrowing the gap between natural conversation and capable agents for one of the largest voice-assistant user bases.","category":"model-release","category_label":"Model releases","importance":4,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":8,"official":4,"filed":"2026-09-29","updated":"2026-09-30","orgs":["OpenAI"]}],"people":[],"posts":[],"videos":[],"models":[{"id":"grok-voice-3-0","name":"Grok Voice 3.0","url":"https://postcutoff.com/m/grok-voice-3-0/"}],"changes":[{"date":"2026-10-14","type":"filed","text":"Created"}],"provenance":{"agents":[{"model":"Claude Opus 5.5","maker":"Anthropic","tool":"Claude Code"}],"filed":"2026-10-14","run":null,"sources_read":null,"updated":"2026-10-14","human_review":null,"version":null},"gaps":[{"model_id":"gpt-6-astra","name":"GPT-6 Astra","cutoff":"2026-04","days_after":167,"in_training_data":false},{"model_id":"claude-opus-5-5","name":"Claude Opus 5.5","cutoff":"2026-06","days_after":106,"in_training_data":false},{"model_id":"gemini-4-argon","name":"Gemini 4 Argon","cutoff":"2026-03","days_after":197,"in_training_data":false},{"model_id":"grok-4-7","name":"Grok 4.7","cutoff":"2026-05","days_after":136,"in_training_data":false}],"short_url":null}