The shift from session-based prompting to sustained, event-driven agent orchestration became concrete this month – across tooling, models, infrastructure, and supply chain security.

Claude Sonnet 4.6 + March API Platform Changes – Sonnet displaces Opus as the practical daily driver

Claude Sonnet 4.6 is Anthropic’s most capable Sonnet release yet – a full upgrade across coding, computer use, long-context reasoning, and agent planning – while pricing stays at $3/$15 per million tokens. The benchmark shifts here are material, not marketing: developers with early access preferred Sonnet 4.6 over Sonnet 4.5 approximately 70% of the time in Claude Code testing, and it was even preferred over Opus 4.5 – November 2025’s flagship – 59% of the time. At Sonnet pricing, that rewrites the model selection calculus for most agentic pipelines.

Now I have comprehensive research across all the major items. Let me compile the report.

Agentic Coding: Monthly Intelligence Brief — April 2026

The infrastructure gap between prototyping and shipping agents closed this month, while the attack surface for agentic IDEs came into sharp focus.

Claude Opus 4.7 + New Effort Model — Same price, materially better coding, one breaking tokeniser

Anthropic launched Claude Opus 4.7 on April 16, 2026.

I’ll research the major developments from May 2026 across the agentic coding landscape. Let me run multiple searches simultaneously.

Good data from those searches. Let me now search for a few more specific items — Cursor’s security vulnerability, Claude’s Managed Agents / self-hosted sandbox update, and the Google Antigravity launch.

Excellent — I now have comprehensive data across all the major stories. Let me compile the brief.

Agentic Coding: Monthly Intelligence Brief — May 2026

May was defined by two parallel themes: multi-agent execution becoming a mainstream primitive, and the attack surface of agentic IDEs finally receiving serious security scrutiny.