--- title: "xAI Releases Grok Skills and Updates Tool Calling Responses API" url: https://daily.dev/posts/xai-releases-grok-skills-and-updates-tool-calling-responses-api-70xrc56pd source_url: https://www.infoq.com/news/2026/05/xai-grok-skills type: article source: "InfoQ" published: 2026-05-22T10:28:45.201Z updated: 2026-08-24T07:03:28.311Z tags: ["llm", "ai-agents", "grok"] reading_time: 3 upvotes: 0 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # xAI Releases Grok Skills and Updates Tool Calling Responses API **[InfoQ](https://daily.dev/sources/infoq)** · 3 min read · 0 upvotes · 0 comments ## Summary xAI has launched Grok Skills, a persistent custom expertise system that lets users define reusable workflows, preferences, and document-handling routines once and have Grok apply them automatically across all future conversations. Built-in capabilities include generating and editing Word, PowerPoint, Excel, and PDF files. On the developer side, the Responses API for Grok 4.3 supports OpenAI-compatible tool calling with native server-side execution for built-in tools like web_search, x_search, and code_interpreter, plus custom function definitions via JSON schemas. The model handles up to 128 tools per request, supports parallel tool calls, and maintains a 1 million token context window. Compared to OpenAI Skills, Claude Skills, and Vercel Agent Skills, Grok Skills positions itself as a lightweight platform-native workflow layer tightly integrated with the X platform. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#llm](https://daily.dev/tags/llm), [#ai-agents](https://daily.dev/tags/ai-agents), [#grok](https://daily.dev/tags/grok) [View this post on daily.dev](https://daily.dev/posts/xai-releases-grok-skills-and-updates-tool-calling-responses-api-70xrc56pd)