xAI Grok 4
Elon Musk's xAI frontier model — Grok 4 launched 2025-07. Trained on Colossus (100k+ GPU supercluster in Memphis). Deeply integrated with X/Twitter (real-time tweet data access). Grok 4 Heavy variant for premium tier. No frontier-tier open-weights — Grok 1 (314B MoE) is the only weight release. The x.ai site now brands itself SpaceXSI (page title, checked 2026-10-29).
Active · Verified 2026-10-31 · fresh as of 2026-10-31 · 38 cited facts, 2 with a third-party source · 2 recorded changes · Suggest a correction
At a glance
- Type
- Frontier foundation model from xAI (Grok 4) vendor fix
- Tier
- T1
- Created
- 2023-07 (xAI founded); 2023-11 (Grok 1); 2024-08 (Grok 2); 2025-02 (Grok 3); 2025-07 (Grok 4) vendor fix
- Latest release
- Grok 4.7 (2026-09-21) vendor fix
- License
- proprietary (Grok 4); older open weights: Grok-1 (Apache-2.0) and Grok 2 (Grok 2 Community License) registry fix
- Pricing
- API: Grok 4.7 $2 in / $6 out per 1M (prompts ‹200k tokens; $4 / $12 above); consumer via X / SuperGrok subscriptions third-party fix
- Funding
- xAI merged into SpaceX (announced 2026-02-02, combined ~$1T); prior $20B Series E (2026-01, ~$230B valuation) third-party fix
- Freshness
- 2026-10-31 fix
- Layer
- large-models repo fix
- Licensing
- commercial registry fix
- SDK languages
- python, rest repo fix
- Protocols
- mcp-client, openai-compatible vendor fix
When to use
Optimised for: real-time information (X firehose access); contrarian / less-filtered persona; benchmark frontier-tier reasoning
Anti-fit: X/Twitter integration is unique selling point but creates Musk-political-association risk; weights closed at Grok 4 tier; no on-prem; less polished tool-use than Claude/GPT
Pros & cons
Pros
Real-time X/Twitter data access (unique among frontier models); Colossus supercluster gives independent training capacity; ARC-AGI-2 leader (vendor-stated).
Cons
Owner Musk political controversy creates enterprise procurement headwind; closed weights at Grok 4; no on-prem; less mature ecosystem than Anthropic/OpenAI/Google.
Claims & capabilities
Grok 4 launched Jul-2025; Grok 4 Heavy multi-agent variant; trained on Colossus 100k+ H100 supercluster Memphis; real-time X/Twitter data integration; 256k context
Technical surface
- API surface
- REST + SDK (Python, TS); OpenAI-compatible
- Backend storage
- not applicable — substrate foundation model
- Deployment
- Managed-only — xAI API, grok.com, X apps; also via Amazon Bedrock, Microsoft Foundry, GitHub Copilot (older Grok-1 / Grok 2 weights downloadable)
- Embedding model
- not applicable — not a memory product
- Multi-tenancy
- not applicable — substrate foundation model
- MCP
- not applicable — substrate foundation model
- A2A
- not applicable — substrate foundation model
- OpenTelemetry
- not applicable — substrate foundation model
Compare xAI Grok 4 with…
Similar systems
Other foundation models (substrate reference) in the catalog, ranked by inbound references.
- Anthropic Claude (foundation models) T1
Claude family of frontier foundation models — Sonnet 4 (workhorse), Opus 4.5 (frontier capability), Haiku 4.5 (fast/cheap). Frontier model used as substrate by Claude Code, Anthropic Memory tool, Cline, Aider, Continue.dev, Cursor, Goose, and dozens of other catalog entries. Memory in Claude is parametric (in weights) — discrete episodic memory lives outside the model in the Claude Memory tool (see Platform-provider memory section).
- OpenAI GPT family (GPT-5 / GPT-4o / o3 / o4) T1
OpenAI's foundation model family — GPT-5 (2025-08 flagship), GPT-4o (multimodal workhorse), o3/o4 reasoning series. Substrate for ChatGPT, the OpenAI API, Microsoft Copilot, Azure OpenAI, and many downstream agents in this catalog (Devin, Codex CLI, Operator, Cursor mode). Parametric memory in weights; discrete user memory ships in ChatGPT Memory feature (separate row).
- Google Gemini 3 family T1
Google DeepMind's Gemini 3 frontier model family — Gemini 3 Pro (top tier), 3 Flash (fast), 3 Nano (on-device). Substrate for Google Workspace AI, Vertex AI Agent Platform, Gemini Code Assist, Project Mariner, and Project Astra. Multimodal-native; 1M-10M context window. Largest context window of any frontier model. Used by Gemini Enterprise Agent Platform Memory Bank (separate row).
- Mistral Large 2 / Mixtral family T1
French frontier-model lab (Paris). Family includes Mistral Large 2 (123B dense, Jul-2024), Mixtral 8x22B (open-weights MoE), Mistral Small 3 (24B, open-weights Jan-2025), Codestral (code specialist). EU-headquartered alternative to US/China model labs; GDPR-friendly data residency. Distinct from the Mistral Le Chat memory feature (already in catalog) — this row covers the model family itself as substrate.
- Cohere Command R+ / Command A T1
Toronto-based foundation-model lab (Aidan Gomez, ex-Google Brain 'Attention Is All You Need' co-author). Command family is enterprise / RAG-optimised: Command A (Mar-2025, 111B dense, 256k ctx), Command R+ (104B MoE), Command R7B (smallest tier). Announced merger with Aleph Alpha April-2026. Open weights via CC-BY-NC (non-commercial); Cohere-hosted for commercial.
- DeepSeek R1 / V3 family T1
DeepSeek (Hangzhou-based, Liang Wenfeng founder) — released DeepSeek-V3 671B MoE (37B active) Dec-2024, then R1 reasoning model Jan-2025 that matched o1 at ~3% of inference cost. Caused 'DeepSeek moment' in markets Jan-27-2025 — NVIDIA dropped 17%. MIT license. Substrate for cost-conscious OSS deployers and an active reasoning-research baseline.
Sources (37 cited facts, 2 third-party)
Each fact links to the page it came from; the badge says who published it (how to read sources).
- What it is Frontier foundation model from xAI (Grok 4) vendor
- What it does & what's distinct Elon Musk's xAI frontier model — Grok 4 launched 2025-07. Trained on Colossus (100k+ GPU… vendor
- Claims / benefits Grok 4 launched Jul-2025; Grok 4 Heavy multi-agent variant; trained on Colossus 100k+ H1… vendor
- Modalities text, image (vision); image generation via Aurora; voice-mode on X mobile app vendor
- Created 2023-07 (xAI founded); 2023-11 (Grok 1); 2024-08 (Grok 2); 2025-02 (Grok 3); 2025-07 (Gr… vendor
- Latest release Grok 4.7 (2026-09-21) vendor
- License proprietary (Grok 4); older open weights: Grok-1 (Apache-2.0) and Grok 2 (Grok 2 Communi… registry
- GitHub github.com/xai-org/grok-1 ~50k stars (older Grok 1 weights only) vendor
- Mindshare X Premium+ distribution → tens of millions of consumer users; rapidly growing API; LMSYS… vendor
- Funding xAI merged into SpaceX (announced 2026-02-02, combined ~$1T); prior $20B Series E (2026-… third-party
- Customers / scale X (Twitter) Premium+ subscribers; xAI API enterprise customers; Telegram (rumored); some… vendor
- Pricing API: Grok 4.7 $2 in / $6 out per 1M (prompts ‹200k tokens; $4 / $12 above); consumer via… third-party
- Compliance SOC 2 Type II; GDPR (X has EU presence); no HIPAA/FedRAMP yet vendor
- Data handling Trains on X/Twitter public data by default; enterprise API never-trains commitment vendor
- Deployment Managed-only — xAI API, grok.com, X apps; also via Amazon Bedrock, Microsoft Foundry, Gi… vendor
- HQ San Francisco, US (Memphis training facility) vendor
- Founders / pedigree Elon Musk (Founder/CEO; also Tesla/SpaceX/X); Igor Babuschkin (ex-DeepMind), Jimmy Ba (T… vendor
- Performance ARC-AGI-2: Grok 4 Heavy ~30%+ (vendor-stated, leading); MMLU-Pro ~80%; AIME 2025 ~90%; H… vendor
- Code/weights release Grok 4 weights closed; earlier Grok-1 (Apache-2.0) and Grok 2 (Grok 2 Community License)… registry
- API surface REST + SDK (Python, TS); OpenAI-compatible vendor
- LLM lock single-vendor (xAI-only family) vendor
- Runtimes any (HTTP API) vendor
- Validated verticals X/Twitter integration (consumer); financial services (real-time market data via X fireho… vendor
- Time to running <5min via xAI API key; <1min via X Premium+ vendor
- Anti-fit X/Twitter integration is unique selling point but creates Musk-political-association ris… vendor
- Optimised for real-time information (X firehose access); contrarian / less-filtered persona; benchmark… vendor
- Adjacent infrastructure X (Twitter); Tesla Optimus / FSD AI infrastructure (shared GPU); Colossus Memphis superc… vendor
- Pros Real-time X/Twitter data access (unique among frontier models); Colossus supercluster gi… vendor
- Cons Owner Musk political controversy creates enterprise procurement headwind; closed weights… vendor
- Project & sources x.ai/news/grok-4 vendor
- capability-benchmark-sources livecodebench: 80.0% (Grok 4 Fast, Jan–May 2025 window, pass@1; Grok 4 79.0%, 2025-09-19… vendor
- architecture-deployment-locus cloud vendor
- licensing-bucket commercial registry
- positioning-platform-vs-product both vendor
- taxonomy-three-layer-rollup large-models repo
- sdk-languages python,rest repo
- protocol-support mcp-client,openai-compatible vendor
What changed
Changes to this record's lifecycle, licence, release, pricing and hosting facts, from the catalog's git history. Subscribe (Atom)
- 2026-10-26
- Latest release “Grok 4 (2025-07); Grok 4 Heavy (2025)” → “Grok 4.7 (2026-09-21)” source
- Pricing “X Premium+ ($30+/mo includes Grok); API: Grok 4 $3/$15 per 1M (premium tier); Grok 4 Heavy $30/$150 per 1M” → “API: Grok 4.7 $2 in / $6 out per 1M (prompts ‹200k tokens; $4 / $12 above); consumer via X / SuperGrok subscriptions” source
- Funding / ownership “$12B+ total raised; $50B+ valuation 2024-25; Andreessen Horowitz, Sequoia, Valor, Vy Capital, Saudi PIF investors” → “xAI merged into SpaceX (announced 2026-02-02, combined ~$1T); prior $20B Series E (2026-01, ~$230B valuation)” source
- Deployment “Managed-only (xAI API + X Premium); no self-hosting at Grok 4 tier (Grok 1 314B MoE Apache 2.0)” → “Managed-only — xAI API, grok.com, X apps; also via Amazon Bedrock, Microsoft Foundry, GitHub Copilot (older Grok-1 / Grok 2 weights downloadable)” source
- 2026-10-23
- License “Apache 2.0 (Grok 1 only — 314B MoE older release); proprietary (Grok 2/3/4)” → “proprietary (Grok 4); older open weights: Grok-1 (Apache-2.0) and Grok 2 (Grok 2 Community License)” source
Related systems
Referenced by (31)
- Agent Router (formerly Envoy AI Gateway) integrates with — Agent Router supported-providers page lists xAI Grok. (verified 2026-10-29)
- agentgateway integrates with — agentgateway integrations docs have a xAI provider page. (verified 2026-10-29)
- AgentOps integrates with — AgentOps docs have a xAI Grok 4 integration page. (verified 2026-10-29)
- AutoGen / AG2 integrates with — AG2 model configuration docs list xAI Grok as a supported model provider with a config example. (verified 2026-10-29)
- Bifrost (Maxim AI) integrates with — Bifrost supported-providers docs have a provider page for xAI. (verified 2026-10-29)
- Braintrust integrates with — Braintrust docs have a xAI Grok 4 integration page. (verified 2026-10-29)
- Cloudflare AI Gateway integrates with — Cloudflare AI Gateway docs have a xAI (Grok) provider page. (verified 2026-10-29)
- Comet ML integrates with — Comet's Opik docs have a xAI Grok 4 integration page. (verified 2026-10-29)
- Grok Memory (xAI) depends on at runtime — adjacent-infrastructure cell: self-contained xAI / X
- Helicone integrates with — Helicone docs have a xAI Grok 4 integration page. (verified 2026-10-29)
- Inngest integrates with — Inngest AgentKit docs: AgentKit Grok model adapter (reference). (verified 2026-10-29)
- Inspect AI integrates with — Inspect AI model-providers page documents a Grok (xAI) provider. (verified 2026-10-29)
- Kong AI Gateway integrates with — Kong AI Gateway docs have a xAI AI-provider reference page. (verified 2026-10-29)
- LangChain (framework) integrates with — LangChain docs have a XAI integration provider page (xAI's Grok models for conversational AI). (verified 2026-10-29)
- Langflow integrates with — Langflow components bundle: xAI (Grok) language model component. (verified 2026-10-29)
- Langfuse integrates with — Langfuse's integrations directory has a xAI Grok 4 integration page. (verified 2026-10-29)
- Letta / MemGPT integrates with — Letta models docs list xAI in the supported model provider table. (verified 2026-10-29)
- LiteLLM integrates with — LiteLLM docs have an xAI provider page. (verified 2026-10-29)
- LiveKit Agents integrates with — LiveKit Agents docs have a xAI Grok 4 model plugin page. (verified 2026-10-29)
- Mem0 integrates with — Mem0 docs have an xAI Grok as LLM Provider LLM provider page for Mem0 open source. (verified 2026-10-29)
- n8n (AI agent flows) integrates with — n8n built-in AI cluster node: xAI Grok Chat Model node. (verified 2026-10-29)
- OpenRouter integrates with — OpenRouter lists xAI as an inference provider (providers API slug "xai"). (verified 2026-10-29)
- Phidata (now Agno) integrates with — Agno ships a xai model provider module (agno.models.xai). (verified 2026-10-29)
- Pipecat (Daily) integrates with — Pipecat docs have a xAI Grok 4 service page. (verified 2026-10-29)
- Portkey AI integrates with — Portkey docs have an xAI (Grok) LLM provider integration page. (verified 2026-10-29)
- Pydantic-AI integrates with — Pydantic AI docs have an xAI model provider page. (verified 2026-10-29)
- Strands Agents (AWS) integrates with — Strands Agents docs have a community xAI model provider integration page. (verified 2026-10-29)
- TrueFoundry AI Gateway integrates with — TrueFoundry AI Gateway docs have a xAI model-provider page. (verified 2026-10-29)
- Vapi integrates with — Vapi docs list xAI Grok 4 as a provider/integration. (verified 2026-10-29)
- Vercel AI SDK integrates with — AI SDK docs have an xAI Grok official AI SDK provider page. (verified 2026-10-29)
- Weaviate integrates with — Weaviate's integrations / model-provider docs list xAI Grok 4 as an integration. (verified 2026-10-29)