🤖 AI Agents Weekly: Claude Sonnet 5, Grok Voice Agent Builder, LongCat-2.0, Hosted X MCP, Cursor for iOS, Claude Science, and More

Anthropic released Claude Sonnet 5, its most agentic model yet, capable of autonomous planning and tool use at near-Opus performance with lower pricing. xAI launched a no-code Voice Agent Builder for creating human-like voice agents at $0.05 per minute. Other major releases include Meituan's open-source LongCat-2.0, X's hosted MCP server, Cursor's always-on iOS agents, and Claude Science beta.

🤖 AI Agents Weekly: Claude Sonnet 5, Grok Voice Agent Builder, LongCat-2.0, Hosted X MCP, Cursor for iOS, Claude Science, and More Claude Sonnet 5, Grok Voice Agent Builder, LongCat-2.0, Hosted X MCP, Cursor for iOS, Claude Science, and More In today’s issue: Anthropic ships agentic Claude Sonnet 5 xAI launches no-code Voice Agent Builder Meituan open-sources 1.6T LongCat-2.0 X ships a hosted MCP server Cursor launches always-on iOS agents Claude Science app enters beta Anthropic brings Fable 5 back Z.ai ships ZCode for GLM-5.2 Google drops Nano Banana 2 Lite Vercel adds voice agents to AI Gateway WebKit ships a Safari MCP server Google introduces TabFM for tables Bridgewater fine-tunes an expert-judgment model OpenAI releases GeneBench-Pro NVIDIA splits a 30B diffusion model Claude Code steganography sparks debate Microsoft launches its $2.5B Frontier Company AutoMem makes memory a trainable skill ClawArena benchmarks subagent orchestration Qwen 3.6 wins local development And all the top AI dev news, papers, and tools. Top Stories Anthropic Launches Claude Sonnet 5 Anthropic released Claude Sonnet 5, its most agentic Sonnet yet, built to plan, use tools, and run autonomously at a level that recently required larger, more expensive models. Agentic core: Sonnet 5 makes plans, drives browsers and terminals, and completes complex tasks where previous Sonnets stopped short, checking its own output without being asked. Near-Opus at lower cost: Anthropic says performance is close to Opus 4.8 on reasoning, tool use, coding, and knowledge work, at a lower price point. Broad availability: Now the default on Free and Pro and available to Max, Team, and Enterprise, live across all Claude apps and the Claude Platform. Intro pricing: Ships with introductory pricing through August, aimed at high-volume agentic workloads. xAI Launches Grok Voice Agent Builder xAI introduced Voice Agent Builder, a no-code platform for creating human-like voice agents powered by Grok Voice. No-code creation: Build production voice agents without writing code, configuring behavior and voice through the builder. Grok Voice: Agents run on Grok Voice for low-latency, natural-sounding speech aimed at real-time conversational use cases. Usage pricing: Available today at 0.05 dollars per minute, positioning it for customer support, sales, and other high-volume voice workflows. Ecosystem play: Extends xAI’s push into agentic products alongside its hosted X MCP and Grok API tooling.