xAI

Overview

AI research company founded by Elon Musk (2023). Develops the Grok model series. Leverages real-time data access to the X (Twitter) platform as a key strength. In 2026, expanding into agentic coding (Grok Build) and voice AI.

Key People

• Elon Musk — founder, CEO

Models & Products

• Grok 4.6 — Grok 4.6: released 2026-08-07 (reported; no first-party page read, and four write-ups say 2026-08-12 instead). 500K context, $2/$6 per M with the whole request re-pricing above 200K, Artificial Analysis Intelligence Index 61 at $0.84/task — all third-party, read 2026-08-16. Still no xAI model card and no parameter count: disputed at 2T announced 2026-07-18 against 1.5T on the V9 foundation in launch coverage.
• Grok 4.7 — first confirmed 2026-07-25 (Musk: "~4 weeks" from Jul 25 → ~Aug 22). No specs, benchmarks, or parameter count disclosed.
• Grok 4.5 — Grok 4.5 public launch 2026-07-08/09: V9 1.5T + Cursor-trained; $2/$6 per Mtok; Opus-class (wins 2/4 benchmarks vs Opus 4.8); default model in Grok Build + all Cursor plans; not yet in EU. (source)
• Grok V9-Medium — Grok V9-Medium shipped to consumers (Grok on X + SuperGrok) 2026-06-16: 1.5T parameters (3× the prior 500B V8-small), trained on Cursor workflow data — coding-specialized, targets Claude's coding lead. Not in xAI API docs as of 2026-06-19. Musk: "Much better at coding." (source)
• Grok 5 (in training): 6T-parameter MoE. Training on Colossus 2 (Memphis, 1GW, 550K GB200/GB300). Q2 (June 30) window closed without release; July now target.
• grok-4.3 — current production model (May 2026, consolidates the grok-4 line; grok-4/4-fast/4.1-fast deprecated → redirect targets)
• Grok 4.1 Fast (xAI) — best tool-calling model, 2M context, includes Agent Tools API ($0.20/$0.50 per 1M tokens)
• Grok Build — terminal-native agentic coding CLI (2026-05-14 early beta, SuperGrok Heavy)
• Grok Automations — scheduled AI tasks (all users) + email-triggered automations (SuperGrok); launched 2026-07-16
• Grok Connectors — Gmail, Drive, Notion, GitHub, Linear, SharePoint, Outlook integration + BYO MCP (2026-05-06)
• Grok Voice API — multi-step workflow voice agent, 25+ languages; engine is Grok Voice Think Fast 2.0 since 2026-07-29 (the grok-voice-latest alias moves to it 2026-08-05), previously grok-voice-think-fast-1.0
• Grok STT / TTS — standalone speech APIs
• Grok Imagine Image 2.0 — Grok Imagine Image 2.0, released 2026-08-07 as Quality Mode on grok.com/imagine and the mobile apps. Editing-first: region-level magic wand, segmentation, background removal, up to five reference images per generation. Claimed #2 on both Arena image tracks behind gpt-image-2. No API at launch. (source)
• Grok Imagine Quality Mode API — enhanced image generation

Recent Activity

• 2026-08-16: Grok 4.6's specification arrived nine days after the model did — from documentation sites, not from xAI — three rows that had read unknown since launch now have values: 500,000-token context, $2/M input · $6/M output, and an API. Above 200K tokens the entire request re-prices at $4.00/M input · $1.00/M cached input · $12.00/M output — a cliff, not a tier, so the marginal cost of crossing it applies to every token before it. Knowledge cutoff 2026-02-01; text and image in, text out; low/medium/high/xhigh effort levels. Artificial Analysis, absent Grok 4.6 on 08-09, now measures it at 61 on the Intelligence Index at $0.84 per task — level with GPT-5.6 Sol (max) and Claude Opus 5 (high), against $1.23 and $2.34 for the Anthropic rows. Why it matters: xAI's competitive claim has been cadence, and the price is now the sharper one — frontier-band parity at roughly a third of Opus 5 (max)'s measured cost per task. What has not changed is that no xAI model card, pricing page or benchmark table has been read from this environment, so all of the above is third-party; there is still no parameter count; and four of the sources read date the release to 2026-08-12 against the 2026-08-07 this wiki has published since 08-08. Both dates are third-party and the conflict is recorded, not resolved. → Grok 4.6 (source) (AA snapshot) (appwrite) (mem0)

• 2026-08-07: Grok Imagine Image 2.0 shipped the same day as Grok 4.6 — and the image line went app-first while the video line went API-first — xAI released Grok Imagine Image 2.0 on 2026-08-07, generally available as Quality Mode on grok.com/imagine and in the iOS and Android apps. The release is an editing tool rather than a generator refresh: a magic wand that changes only the region pointed at, segmentation for precise area selection, background removal with transparency, multi-reference editing accepting up to five input images in one generation, and smart resize across nine aspect ratios. xAI claims #2 in the world on both the Arena text-to-image and image-edit leaderboards as of 2026-08-07, behind OpenAI's gpt-image-2 in both — a claim relayed by reporting, since no first-party page and no leaderboard was readable this run, and this repo's own sources/evals/ snapshots carry no image-edit column to check it against. No API at launch, which is reported rather than inferred. Why it matters: xAI shipped a frontier text model and a top-two-claimed image model on the same day, but in opposite directions — Grok Imagine Video 1.5 (Preview) launched API-first at $0.08/second and this one launched app-first with no API, which reads as consumer capture rather than developer platform for the image line. → Grok Imagine Image 2.0 (source) (SpaceXAI) (Unite.AI)

• 2026-08-07: Grok 4.6 shipped on schedule — and the parameter count in the launch coverage is not the one Musk announced — Grok 4.6 is reported released on 2026-08-07, a day inside the ~August 8 target Musk gave on July 25 and consistent with his August 4 "likely next week". The cadence xAI has been claiming since June therefore holds for a second month: 4.5 on July 8, 4.6 on August 7, 4.7 targeted ~August 22. What does not hold is the specification: Musk announced 4.6 on 2026-07-18 as a 2T model, "33% larger" than Grok 4.5; launch coverage describes 1.5T on the same V9 foundation, with gains from improved SFT and RL instead of scale. Both are recorded on Grok 4.6 under ## Conflicting Reports rather than resolved. No first-party xAI launch page, model card or pricing was readable from this run — the egress proxy blocked every host attempted — so the release itself is carried on third-party reporting, and Context window, Pricing and Availability all remain unknown a day after launch. Why it matters: a monthly frontier cadence is xAI's central competitive claim, and it is being met. But the two releases this wiki can compare are a scale story that became a post-training story somewhere between announcement and ship — and with no model card behind either, there is nothing to check it against. → Grok 4.6 (source) (kie.ai) (AIToolsReview)

• 2026-07-29: Grok Voice Think Fast 2.0 released — and today it becomes the default for every grok-voice-latest caller — SpaceXAI released its next-generation speech-to-speech model on July 29, positioned on intelligence, transcription accuracy, conversational behaviour and tool use. The design claim is that it reasons in parallel with speech, holding latency down while handling harder queries: ~0.70 s to first audio response, against 1.25 s for the previous Think Fast model. Reported figures on Artificial Analysis' speech-to-speech benchmark, overall: 82.9%, up from 75.7% for Think Fast 1.0, ahead of GPT-Realtime-2.1 at 79.1% and Gemini 3.1 Flash at 69.5% — recorded as reported, since this repo holds no Artificial Analysis snapshot carrying a speech-to-speech column. Pricing $0.08/minute speech-to-speech plus $0.004 per text input. On 2026-08-05 the grok-voice-latest alias moves automatically from grok-voice-think-fast-1.0 to 2.0, with xAI stating the upgrade should improve almost all use cases without prompt edits. No parameter count, architecture or context window published. Why it matters: xAI's voice stack has until now been measured on its own tau-voice Bench (Think Fast 1.0 at a self-administered 67.3%); a third-party benchmark placing it ahead of OpenAI's realtime model is a different kind of claim, and the automatic alias flip means every existing integration inherits it without opting in. → Grok Voice Think Fast 2.0 (source) (SpaceXAI) (TestingCatalog)

• 2026-07-25: Grok 4.7 first confirmed — Musk gives explicit timelines for both 4.6 and 4.7 — Elon Musk publicly confirmed both Grok 4.6 and Grok 4.7 release timelines on July 25, 2026: Grok 4.6 is "~2 weeks" out (~August 8); Grok 4.7 is "~4 weeks" out (~August 22). This is the first public confirmation of Grok 4.7 as a distinct upcoming model. The July 25 statement also sharpens the previously ambiguous "~early August" window for Grok 4.6 to a specific ~Aug 8 target. The monthly cadence (Grok 4.5 Jul 8 → 4.6 ~Aug 8 → 4.7 ~Aug 22) is now publicly confirmed through at least August 2026. No specs, benchmarks, parameters, or pricing for Grok 4.7 have been disclosed. Why it matters: confirms SpaceXAI intends to ship two more frontier updates before end of August — both faster and more frequent than any other frontier lab's current confirmed release cadence. → Grok 4.6 (source) (NextBigFuture)

• 2026-07-24: Grok Google Workspace add-on launched — free integration in Sheets, Slides, and Docs — SpaceXAI launched a free Grok add-on for Google Workspace (install: Google Workspace Marketplace). Grok appears as a sidebar panel in each application. Capabilities by app: Sheets — read selected ranges, explain data with cell citations, write formulas, update values and rebuild financial scenarios; Slides — generate full presentations from an outline, add theme-matching slides, create charts from web or X data; Docs — transform rough notes into formatted documents, draft and refine content. Cross-platform context: one week earlier (July 17–18), SpaceXAI launched Microsoft Office add-ins (Excel, Word, PowerPoint). The two launches are a deliberate cross-platform productivity strategy — Grok as the AI layer spanning both major office suites. Why it matters: Grok's prior integration advantages were tied to X data and voice; the dual office-suite rollout extends Grok into knowledge-worker workflows where ChatGPT and Copilot are entrenched. Free pricing removes the adoption barrier. (source) (SpaceXAI) (Marketplace)

• 2026-07-18: Grok 4.6 training announced — 2T parameters, targeting ~early August launch (updated Jul 27: Musk posted Jul 24 "~2 weeks" → implies ~Aug 7) — Elon Musk announced on X (July 18) that xAI's next model, expected to be named Grok 4.6, will complete its initial training run the week of July 20, 2026. Key claims: 2T parameters (vs. Grok 4.5's 1.5T — 33% larger), "better than [Grok 4.5] in every way." Speed target: keeping token efficiency close to Grok 4.5. No benchmarks, pricing, context window, or launch date published. Musk framed it as a direct response to Moonshot AI's Kimi K3 (2.8T MoE, announced July 16). Updated (Jul 27): Musk posted on X (Jul 24) that Grok 4.6 is "~2 weeks" out — implying ~Aug 7 launch for 4.6 and ~Aug 21 for 4.7 if the monthly cadence holds. → Grok 4.6 → Grok 4.6 (source) (Dataconomy) (WION)

• 2026-07-16: Grok Automations launched — scheduled AI tasks and email triggers — xAI launched Grok Automations, a feature that lets users describe a recurring job once, set a schedule or trigger, and have Grok execute it automatically with a run history. Schedule types: once, daily, weekdays, weekly, monthly, yearly in the user's timezone. Email triggers (SuperGrok only): watches inbox for matching messages (filter by sender, recipient, or subject); when triggered, passes incoming email as context and Grok responds to the actual message. Execution model: each automation run is a fresh conversation (same instructions, current data); connectors and skills can be attached; results saved to run history with notification options (email, app, both, or none). Available across grok.com, iOS, and Android; email triggers require SuperGrok. Why it matters: extends Grok from a conversational interface to an always-on background agent. Email-triggered automations position Grok as an inbox agent competing with ChatGPT Work, Anthropic Cowork, and enterprise automation tools (n8n, Zapier). Combines with xAI's existing Voice Agent Builder and Grok Connectors to form a coherent ambient agent stack. (source) (xAI)

• 2026-07-16: Grok Build CLI open-sourced under Apache 2.0 — 844K lines of Rust — xAI released the full Grok Build CLI codebase under the Apache 2.0 license ~72 hours after the privacy breach reached Hacker News front page (July 14). Repository: github.com/xai-org/grok-build; 844,530 lines of Rust; covers the agent loop, all tool implementations (file edit, shell exec, web search, doc retrieval), terminal UI (TUI), and extension system (Agent Client Protocol / ACP). Concurrent announcements: usage limits removed for all Grok users; data storage defaults to off since July 12. Why it matters: first agentic coding CLI by a frontier lab (other than Claude Code) to be fully open-sourced under a permissive commercial license. The open-source release enables independent security audit of the agent loop and upload behavior — a direct response to the trust erosion from the breach. Apache 2.0 allows unrestricted commercial use; forks and derivatives are possible immediately. → Grok Build (source) (xAI) (github.com/xai-org/grok-build)

• 2026-07-12–14: Grok Build CLI v0.2.93 — full Git repository upload privacy breach disclosed — Security researcher cereblab published wire-level analysis proving that Grok Build CLI silently uploaded entire local Git repositories to a Google Cloud Storage bucket (grok-code-session-traces) managed by xAI — including full commit history, untracked files, and unredacted .env secrets (API keys, database passwords, SSH keys). One test: 5.1 GiB uploaded from an 11.2 GiB repo when only 192 KiB was needed — ~27,800× excess. xAI had marketed: "nothing from your codebase transmitted to xAI servers during a session." The wire data directly contradicts this. The /privacy toggle was ineffective — it only controlled post-upload data retention, not the upload itself. Story reached Hacker News front page July 14. xAI response: server-side flag disable_codebase_upload: true deployed (stopped new uploads); new /privacy command added. Elon Musk posted July 13: "all user data that was uploaded to SpaceXAI before now will be completely and utterly deleted." Deletion not independently verified as of July 14. Security advisory: any developer who ran Grok Build CLI before July 13, 2026 on a repo containing secrets in tracked files or Git history should treat those credentials as potentially compromised. → Grok Build (source) (The Hacker News) (Cybernews)

• 2026-07-06: 21 new multilingual Grok Voices launched — voice roster expands from 5 to 26 — SpaceXAI released 21 new flagship voices for Grok Voice on July 6, joining the original 5 (Ara, Eve, Leo, Rex, Sal — all enhanced with improved pacing and emphasis). Every voice is natively multilingual, supporting all of Grok Voice's 25+ languages (English, Hindi, Spanish, French, German, Japanese, Korean, Thai, and more). New voices include: Carina, Zagan, Helix, Orion, Luna, Iris, Altair, Zenith, Perseus, Helios, Lux, Kepler, Rigel, Cosmo, Celeste, Ursa, Sirius, Lumen, Castor, Naksh, Atlas. Additional feature: voice cloning from a reference audio clip up to 120 seconds. Available across the Realtime Voice Agent API, Text to Speech API, and Grok Voice Agent Builder. Use-case optimization: support, characters, commentary, advertising, education. Speech tags for delivery control also added. Why it matters: the 5→26 voice expansion, native multilingualism, and cloning capability positions Grok Voice as the most feature-complete voice API in the frontier-lab market — directly competing with ElevenLabs and OpenAI's TTS/Realtime stack. → (source) (xAI)

• 2026-07-08/09: Grok 4.5 public launch — Musk announced July 8; went live July 9. Available in Grok Build (now default), Cursor (all plans), and SpaceXAI console. Not yet in EU. Pricing: $2/$6 per Mtok. Published benchmarks vs Opus 4.8: DeepSWE 1.0 62% vs 55.75% (wins), DeepSWE 1.1 53% vs 59% (loses), Terminal Bench 2.1 83.3% vs 78.9% (wins), SWE-Bench Pro 64.7% vs 69.2% (loses). Token efficiency: 4.2× fewer output tokens per task than Opus 4.8. → Grok 4.5 (source)

• 2026-07-06: xAI rebrands to SpaceXAI — On July 6, 2026 xAI adopted the SpaceXAI name and logo, nesting the xAI identity visually inside the SpaceX brand. X handle changed to @SpaceXAI. Product names unchanged (Grok, Grok Build, Voice Agent Builder). Primary surface using the new brand is the SpaceXAI console (developer API dashboard). The rebrand formalizes xAI's deepening integration with SpaceX (Colossus data centers, Grok in Tesla vehicles, joint employee programs). Entity slug remains xai — slug changes break wikilinks. ⚠️ Note: already referenced as "SpaceXAI console" in the July 8/9 Grok 4.5 entry above. (source) (@SpaceXAI)

• 2026-07-06: Grok 4.5 web UI feature flag detected — consumer launch imminent — TestingCatalog discovered on July 6 that the Grok web client contains a feature flag with the account upgrade copy "Unlock the full power of Chat with Grok 4.5" — the consumer launch scaffolding is in place. The flag is dormant as of July 8, meaning only the flip remains before broader rollout. Based on the Grok 4.3 precedent, initial access is expected for paid SuperGrok Heavy ($300/month) subscribers. No official benchmarks, pricing details, or context window specs have been published. → Grok 4.5 (source)

• 2026-07-01: Voice Agent Builder — no-code voice agent platform in beta — xAI launched Voice Agent Builder, a no-code platform to build production voice agents on Grok Voice in under 2 minutes. Bundles telephony, knowledge retrieval, tool-calling, guardrails, MCPs, observability, and call recording in one speech-to-speech interface — replacing the fragmented STT+LLM+TTS three-vendor stack. Integrations: Gmail, Google Calendar, Outlook, Linear, Notion, OneDrive, Google Drive, custom APIs; human transfer support. Pricing: $0.05/min agent audio + $0.01/min telephony — undercutting ElevenLabs and Vapi. 80+ voices, 25+ languages, brand voice cloning from ~2 min of audio. Powered by Grok Voice Think Fast 1.0 (67.3% on internal tau-voice Bench; self-administered). Why it matters: MCP support baked in from day one makes this the first no-code voice agent tool with an open integration standard — any MCP server can be connected without writing glue code. (source) (xAI)

• 2026-06-30: Grok 5 misses Q2 (June 30) deadline — still in training on Colossus 2 as of June 30. Q2 window now closed. July is the next stated target. Monthly release cadence (Grok 4.5 → Grok 5) remains xAI's stated strategy. (felloai.com)

• 2026-06-28: Grok 4.5 enters private beta at Tesla and SpaceX — Elon Musk announced on X that Grok 4.5 — the enterprise deployment of xAI's V9-class model (1.5T parameters, Cursor-trained) — entered private beta at Tesla and SpaceX. Musk stated "early evals show performance close to, perhaps exceeding Opus" (i.e., Claude Opus 4.8). The 1.5T V9 foundation underlies both the consumer Grok V9-Medium (shipped 2026-06-16) and this enterprise-tuned variant. Musk also announced a monthly model release cadence for the remainder of 2026. Additionally, Musk stated: "My estimate of the probability of Grok 5 achieving AGI is now at 10% and rising" — a speculative CEO claim for the in-training 6T model, not Grok 4.5 itself. → Grok 4.5 (source)

• 2026-06-22: Grok Build /goal — long-running autonomous execution mode — xAI shipped /goal, a new autonomous execution mode inside Grok Build. The mode lets developers hand off a complex implementation task and step back entirely while the agent plans, executes, and self-verifies from start to finish. Implementation: two-model pipeline (Composer 2.5 for planning + Grok Build 0.1 for execution) with three-form verification (code review, webpage inspection, script execution). Users can still inject additional instructions mid-run; pause/resume/clear controls are available. Available now to SuperGrok ($30/month) or X Premium+ subscribers. Why it matters: the plan→execute→verify loop makes Grok Build competitive with Anthropic Managed Agents and OpenAI Codex Enterprise for long-running autonomous coding tasks, now on a consumer subscription model. → Grok Build (source) (xAI)

• 2026-06-03: Grok Imagine Video 1.5 Preview released — image-to-video model launched in preview on the xAI API. Took #1 on the Artificial Analysis Video Arena image-to-video leaderboard. 720p, 15 seconds, native audio sync. Built on the Aurora engine (autoregressive MoE, interleaving text/image/video/audio). $0.08/sec. Simultaneously announced a Vapi partnership — Grok adopted as the default engine for all 12 of Vapi's core voices (targeting 2.5M+ voice agents). → Grok Imagine Video 1.5 (Preview) (source)

• 2026-05-25 (captured 2026-06-01): Grok V9-Medium training declared complete — announced by Elon Musk on X. 1.5T parameters (3× V8's 500B). Fine-tuned on Cursor developer workflow data. RL starting imminently. Release target: ~2 weeks out (mid-June 2026). Grok 5 (6T MoE): training separately on Colossus 2 (Memphis 1GW supercluster). → (source)

• 2026-05-28: Grok Build 0.1 API public beta — the grok-build-0.1 model became available in public beta via the xAI API. Speed: 100+ tokens/sec. Pricing: $1/M input, $2/M output. Previously limited to the SuperGrok Heavy ($300/month) CLI or the Kilo Code IDE, but the API release enables direct use in third-party integrations and enterprise workflows. → Grok Build (source)

• 2026-05-27: Grok Build → Kilo Code integration — SuperGrok and X Premium+ subscribers can use grok-build-0.1 directly in Kilo Code (open-source VS Code agentic coding extension, 500+ models supported). No separate API key required (OAuth authentication). Expands the distribution channel from the terminal-only Grok Build CLI to the entire IDE ecosystem. Includes JetBrains IDE and terminal support. → Grok Build (source)

• 2026-05-22 (ingest): Grok 4.1 Fast + Agent Tools API — best tool-calling model (2M context, −50% hallucination vs Grok 4 Fast). Agent Tools API: web browsing, X post search, code execution, document retrieval — all run on xAI infrastructure (no need for developers to manage API keys/rate limits/sandboxes/pipelines). $0.20/$0.50 per 1M tokens. → Grok 4.1 Fast (xAI) (source)

• 2026-05-18 (ingest): Colossus deal captured

• 2026-05-15: Grok + Nous Research Hermes agent — SuperGrok subscribers can use their Grok account and subscription inside the Nous Research open-source self-improving Hermes agent

• 2026-05-06: Anthropic Colossus 1 compute partnership — exclusive lease of the Memphis data center (220,000+ GPUs, 300 MW). ~$5B/year scale. xAI has completed migration of its training workloads to Colossus 2. Musk: "No one set off my evil detector". SpaceX IPO context: monetizing idle assets as xAI is being absorbed into SpaceX. → Anthropic (source)

• 2026-05-17 (ingest): Grok Connectors + BYO MCP write-up

• 2026-05-15: legacy Grok API model retirement — grok-4, grok-4-fast, grok-4-1-fast, grok-code-fast-1 retired → auto-redirect to grok-4.3

• 2026-05-14: Grok Build early beta released — agentic coding CLI for SuperGrok Heavy subscribers (source)

• 2026-05-06: Grok Connectors + BYO MCP — deep integration with 6 platforms (Google Workspace, SharePoint, Outlook, Notion, GitHub, Linear) + support for connecting custom MCP servers (source)

• 2026-05: Grok Voice API + STT/TTS APIs announced — building out a voice agent ecosystem

• X platform real-time data integration — maintains a differentiator in real-time access to news/markets

Strategic Position

• Frontier competitors: Anthropic, OpenAI, Google DeepMind
• Differentiation: exclusive real-time access to X platform data, ties into the Musk ecosystem (Tesla, SpaceX). The Aurora engine is evolving into a unified multimodal stack across text, image, video, and audio
• 2026: coding agents (Grok Build) + voice AI — competing directly with OpenAI Codex / Claude Code
• Compute: Colossus 1 → leased to Anthropic (300 MW, $5B/yr). Own training concentrated on Colossus 2.
• SpaceXAI rebrand (2026-07-06): xAI adopted the SpaceXAI name and handle (@SpaceXAI on X), formally nesting the AI unit inside the SpaceX brand identity. A restructuring is underway to absorb xAI into SpaceX ahead of an IPO. The Colossus 1 lease should be read in this context.

Related

• Grok Imagine Video 1.5 (Preview) — image-to-video, Video Arena #1
• Grok Build
• Grok 4.1 Fast (xAI) — best tool-calling model, Agent Tools API
• Agents (LLM Agents) (coding agent category)

Conflicting Reports

None