Cursor 3.5 (May 20) brings Automations into the Agents Window and adds multi-repo support — finally letting a single automation agent reason across multiple codebases. Five no-repo templates also ship, signalling that Cursor is expanding from coding IDE to general business automation platform.
Windsurf invented the agentic IDE — an editor where the AI reads files, writes code, runs terminal commands, and orchestrates multi-step workflows without leaving your development environment. It’s a genuine innovation. But as Cascade grows more capable and Windsurf absorbs Devin’s autonomous DNA, a structural tension is becoming impossible to ignore: the more agentic an IDE becomes, the more it strains against the architecture that makes it an IDE.
xAI shipped Grok 4.3 on May 4 with 40% lower prices, 1M token context, and 16-parallel-agent orchestration — then followed with Grok Skills on May 18, persistent cross-session expertise that replaces the system-prompt preamble you paste at the start of every chat. The strategy is clear: stop racing GPT-5.5 and Claude Opus 4.7 on raw benchmarks, and build the best cost-per-useful-task ratio on the market.
WWDC 2026 (June 8) is the most AI-dense developer conference in Apple’s history: Gemini-powered Siri 2.0, a Core AI framework replacing Core ML, and Siri Extensions letting users plug in Claude, ChatGPT, or Grok. The backstory no one is foregrounding: Anthropic’s Claude Code is already inside Apple building the very AI features being demoed on stage.
Mitiga Labs disclosed a stealth attack that rewrites Claude Code’s config file via malicious npm postinstall hooks to hijack OAuth tokens for every MCP-connected service — Jira, GitHub, internal databases. Token rotation doesn’t stop it. Anthropic classified the report out of scope.
Google launched Antigravity 2.0 at I/O on May 19 — a full rebuild with a standalone desktop app, a Go-based CLI, a public SDK, and Managed Agents API that spins up isolated Linux environments with one call. It scores 76.2% on SWE-bench Verified. It is Google’s most credible attempt yet at terminal-native agent infrastructure, and it still has three structural problems.
Anthropic acquired Stainless — the startup that generated SDKs for OpenAI, Google, Cloudflare, and Anthropic itself — for more than $300 million. All hosted Stainless products are being wound down. Competitors lose access; Anthropic gets the developer infrastructure layer.
Cursor Composer 2.5 hits 79.8% SWE-bench Multilingual and 69.3% Terminal-Bench 2.0 — essentially tying Claude Opus 4.7 — at roughly one-tenth the cost. Cursor also ships parallel agents and a new PR review experience the same week. The benchmark gap is closed. The autonomy gap is not.
Claude Code v2.1.145-146 ships /code-review (replacing /simplify) with optional effort levels, claude agents –json for scripting live session lists, and agent_id/parent_agent_id on OpenTelemetry spans — the missing link for tracing multi-agent executions end to end.
Gemini 3.5 Flash launched at Google I/O on May 19. Google calls it a Flash model — implying budget tier — but at $9/M output tokens it sits between Haiku and Sonnet pricing while hitting 76.2% on Terminal-Bench 2.1 and leading all competitors on MCP Atlas. It does not beat Claude Opus 4.7 on SWE-bench. The benchmark picture is more complicated than Google’s marketing suggests.