Premium museum expansion · Provider catalog
xAI
Grok — chat and API models from xAI, integrated with X (Twitter) for subscribers in many regions. Known for “spicy” branding and rapid iteration; Grok-2 open-weight releases made headlines. See xAI (company) and Grok (chatbot), March 2026 snapshot.
Architecture & training (overview)
Public technical detail is sparse vs OpenAI/Google. Grok models are large-scale Transformer stacks; Grok-1 weights were open-sourced (Apache 2.0) in 2024 as a 314B-parameter MoE (per announcement). Later generations emphasize real-time X data access and multimodal features in product.
Official: x.ai
Tiers & naming
- Grok-1 — first open-weights milestone (MoE).
- Grok-1.5 / 2 / 3 / 4 — sequential generations; higher numbers = frontier capability in xAI messaging.
- Modes — Normal vs Fun / persona toggles in consumer UI (not separate models).
- Heavy — some menus expose a higher-compute / reasoning path (product naming varies).
Launch & benchmarks (selected)
Grok-1 (2023) launched as a ChatGPT competitor for X Premium+. Grok-2 (2024) added image generation and stronger benchmarks; portions released as open weights. Grok-3 (early 2025) claimed SOTA narratives in public demos. Grok-4 (2025–2026) appears in frontier IDE pickers alongside GPT-5.x and Claude 4.x.
Model versions
| Name | Era | Status | Notes |
|---|---|---|---|
| Grok-1 | 2023 | Superseded | 314B MoE open release (2024); Grok-1 open weights. |
| Grok-1.5 | 2024 | Superseded | Longer context; faster iteration. |
| Grok-2 | Aug 2024 | GA | Multimodal + image gen; open-weight components. |
| Grok-3 | Feb 2025 | GA | Reasoning demos; “DeepSearch” agentic features in press. |
| Grok-4 | 2025–2026 | GA | Q1 2026 flagship tier in frontier tool menus. |
Technical notes
| Topic | Public detail |
|---|---|
| Grok-1 open | 314B MoE, Apache 2.0 — enables community forks and research. |
| Real-time data | X integration for current events (subject to product policy). |
| Parameters (Grok-3+) | Mostly undisclosed; rely on xAI marketing and third-party benchmarks. |
Selected timeline (2024–2026)
- 2024: Grok-2; open-weights story; image capabilities.
- 2025: Grok-3; agentic search narratives.
- 2026: Grok-4 in premium IDE lineups; competition with GPT-5.x, Claude 4.5, Gemini 3.x.
References
xAI (company) · Grok (chatbot) · x.ai
Museum compilation — not an official xAI model sheet.