Field Notes for builders who actually ship.

ChatGPT Market Share Falls Below 50%: What Gemini and Claude's Surge Means for Developers (June 2026)

For the first time since ChatGPT launched in November 2022, OpenAI holds less than half the AI assistant market at 46.4%. Gemini is at 27.7%, Claude at 10.3% with a 13% paid conversion rate that leads the field. The single-platform era of AI development is over.

Jun 23

Tutorials7 min

Imagen 3 & 4 Shut Down June 24: Migrate to Gemini Image (2026)

All Imagen models on Firebase AI Logic shut down June 24, 2026. The replacement is gemini-2.5-flash-image — here are the exact API changes, updated code in Python, Node.js, Swift, and Kotlin, and the one Imagen capability with no replacement anywhere.

Jun 22

Agentjacking: How Fake Sentry Errors Hijack Claude Code and Cursor (2026)

One HTTP POST. No credentials required. 85% success rate against Claude Code, Cursor, and Codex simultaneously. Tenet Security disclosed agentjacking on June 12 — prompt injection at the observability layer — and the exposure math is ugly.

Jun 21

Tool Reviews8 min

Claude Opus 4.8 vs Gemini 3.5 Pro vs GPT-5.6: Developer Model Selection Guide (June 2026)

Three frontier models compete for production workloads in June 2026. Claude Opus 4.8 leads on coding (88.6% SWE-Bench), Gemini 3.5 Pro owns ultra-long context (2M tokens), and GPT-5.6 targets agentic tasks. Here's the decision framework.

Jun 21

SpaceX AI1 Orbital Data Center: 1 GW of Space AI Compute by 2027, Developer Guide

SpaceX revealed AI1 on June 9, 2026 — a 70-meter orbital data center satellite targeting 150 kW of AI compute per unit and 1 GW of total space capacity by late 2027. Here's what the physics says, what the economics don't, and what developers should actually do about it.

Jun 20

Gemini 3.5 Pro: 2M Context, Deep Think, and the Post-Fable-5 Frontier

Google’s Gemini 3.5 Pro hits GA in late June 2026 with a 2-million-token context window and Deep Think reasoning — stepping into the vacancy left by Claude Fable 5’s shutdown. Here’s what’s confirmed and what developers should do before launch day.

Jun 20

GPT-5.6 Preview: 1.5M Context, Agentic-First Design & Codex UltraFast

OpenAI's GPT-5.6 release candidate surfaced in Codex backend logs on June 12 under the codename kindle-alpha. Here's what the 1.5M token context, agentic-first training objective, and incoming Codex UltraFast mode mean before the official announcement.

Jun 19

Tool Reviews9 min

OpenCode: 160K Stars, Model-Agnostic, and It Beat Claude Code on Debugging

OpenCode is the most-starred open-source AI coding agent in history — and in a 38-task production benchmark, it beat Claude Code on debugging and documentation while losing on complex refactors. Here's the full breakdown, cost model, and who should actually switch.

Jun 19

AI12 min

Agent Orchestration Decision Matrix 2026: When to Script vs Model-Drive

The WOWHOW Orchestration Score gives you 6 weighted factors to decide whether your agent pipeline needs deterministic code or model-driven control — with a worked decision table for real-world scenarios.

Business11 min

The Whitespace Map: Find Topics Competitors Skip 2026

Most content teams chase the same crowded keywords. The Whitespace Map is a WOWHOW framework that identifies topics where demand is real but existing supply is thin, partial, or deliberately ignored by big publishers — giving you a defensible lane instead of a volume war.

AI12 min

Prompt Cache Orchestration: Beat the 5-Min TTL Miss 2026

The 5-minute prompt-cache TTL is a silent tax on every multi-agent pipeline. This post lays out the WOWHOW Cache-Warm Sequencing framework — a scheduling heuristic that batches subagent calls to keep the cache hot and your token bill predictable.

AI12 min

AI Agent Evaluation Framework: The Triangle 2026

Most agent benchmarks test only task completion. The WOWHOW Agent Evaluation Triangle scores three axes that actually predict real-world failure modes: Tool-Selection Accuracy, Planning Quality, and Rollback-ability.