# xAI: what I've logged

> xAI comes up in 9 posts of my AI log, from September 2025 to September 2026, and each item below links to the primary source. The releases I logged include Grok Imagine Video 1.5 Lite, Grok 4.7 and Grok Voice Transcribe 2.0, filed under frontier, agents and coding and open weights.

## Items

1. **Grok Imagine Video 1.5 Lite** (xAI, 28 Sept 2026): A lighter text-to-video and image-to-video model with native audio, 1 to 15 second clips and prices from $0.02 a second. [Primary source](https://docs.x.ai/developers/models/grok-imagine-video-1.5-lite) · [Post](https://heyaliasif.com/ai/2026-09-28-week-in-ai#item-7)
2. **Grok 4.7** (xAI, 21 Sept 2026): xAI's top coding and knowledge model, served at the same price and speed as Grok 4.6 and working longer on hard tasks. [Primary source](https://x.ai/news/grok-4-7) · [Post](https://heyaliasif.com/ai/2026-09-21-week-in-ai#item-3)
3. **Grok Voice Transcribe 2.0** (xAI, 14 Sept 2026): A speech-to-text model xAI says is twice as accurate as version 1.0 at the same price. [Primary source](https://x.ai/news/grok-voice-transcribe-2) · [Post](https://heyaliasif.com/ai/2026-09-14-week-in-ai#item-6)
4. **Grok 4.6** (xAI, 10 Aug 2026): Builds on Grok 4.5 with a focus on long-running agents and interactive, visual work, with a 500K window and effort settings up to xhigh. [Primary source](https://x.ai/news/grok-4-6) · [Post](https://heyaliasif.com/ai/2026-08-10-week-in-ai#item-1)
5. **Grok 4.5** (xAI, 13 Jul 2026): xAI's new flagship for coding and agentic work, trained alongside Cursor, with a 500K-token context and API pricing of $2 in and $6 out per million tokens. [Primary source](https://x.ai/news/grok-4-5) · [Post](https://heyaliasif.com/ai/2026-07-13-week-in-ai#item-1)
6. **Grok Build beta** (xAI, 11 May 2026): xAI's release notes record a coding agent that runs as a terminal app, headless in scripts, or behind the Agent Client Protocol. [Primary source](https://docs.x.ai/developers/release-notes) · [Post](https://heyaliasif.com/ai/2026-05-11-week-in-ai#item-3)
7. **Grok 4.3** (xAI, 27 Apr 2026): A 1M-token context taking text and images, five reasoning levels, and $1.25 in and $2.50 out per million tokens under 200K-token prompts. [Primary source](https://docs.x.ai/developers/models/grok-4.3) · [Post](https://heyaliasif.com/ai/2026-04-27-week-in-ai#item-1)
8. **Grok 4.1** (xAI, 17 Nov 2025): An update focused on emotional intelligence, creative writing and fewer hallucinations. [Primary source](https://x.ai/news/grok-4-1) · [Post](https://heyaliasif.com/ai/2025-11-17-week-in-ai#item-3)
9. **Grok 4 Fast** (xAI, 15 Sept 2025): A cheaper Grok 4 variant with a 2M-token context window that merges reasoning and non-reasoning in one model. [Primary source](https://x.ai/news/grok-4-fast) · [Post](https://heyaliasif.com/ai/2025-09-15-week-in-ai#item-2)

## Posts

- 2026-09-28 [Gemini 4 Argon debuts to cyber defenders, Sonnet 5.5, GPT-6.1 Sol](https://heyaliasif.com/ai/2026-09-28-week-in-ai)
- 2026-09-21 [Claude Opus 5.5 and GPT-6 Sol land, Claude finds a new enzyme](https://heyaliasif.com/ai/2026-09-21-week-in-ai)
- 2026-09-14 [Gemini 3.8 Live, open Qwen-Image-2.1 and Anthropic's Accenture pact](https://heyaliasif.com/ai/2026-09-14-week-in-ai)
- 2026-08-10 [Grok 4.6, Gemini 3.7 Flash and GLM-5.3 arrive in four days](https://heyaliasif.com/ai/2026-08-10-week-in-ai)
- 2026-07-13 [Grok 4.5 lands, Kimi K3 and Inkling open up huge models](https://heyaliasif.com/ai/2026-07-13-week-in-ai)
- 2026-05-11 [Claude Platform on AWS, Codex on your phone, Grok Build beta](https://heyaliasif.com/ai/2026-05-11-week-in-ai)
- 2026-04-27 [Grok 4.3, Mistral Medium 3.5 weights, and the Qwen3.6 family](https://heyaliasif.com/ai/2026-04-27-week-in-ai)
- 2025-11-17 [Gemini 3 Pro, Antigravity, Grok 4.1, Nano Banana Pro, SAM 3](https://heyaliasif.com/ai/2025-11-17-week-in-ai)
- 2025-09-15 [GPT-5-Codex, Grok 4 Fast, and Anthropic explains its bad month](https://heyaliasif.com/ai/2025-09-15-week-in-ai)

Canonical: https://heyaliasif.com/ai/topics/xai