#2026

Braintrust costs $249/mo vs LangSmith's $99/mo. Is the $150/mo premium justified? Break-even math for solo devs, small teams, and scaling AI products.

Across 9 engineering blogs and benchmarks from May 2026, the failure modes of Claude Code, Cursor, Copilot, and Codex now have names and fixes.

Cursor Pro is $20/mo flat; Claude Code via API runs $6.60–$660/mo by workload. We ran the math across 3 usage tiers to find the exact crossover point.

Skip the allowlist queue. Five production-ready defensive AI tools — open weights, hosted APIs, and self-hostable stacks — that protect real apps today, with cost and integration notes.

The GPT-5.5-Cyber capability profile beyond OpenAI's marketing: Simon Willison's evals, the Trusted Access Program scope, and what the Five Eyes briefings actually covered.

Mythos and GPT-Cyber are locked. Open-source alternatives (CodeLlama Guard, Llama Guard 3, Cisco AI defense) are not. We compared both stacks on 4 defensive tasks—the honest results.

Claude Sonnet costs $3.00/1M input tokens; Cursor Composer 2 costs $0.50/1M. Switching saves $275/mo at Heavy workload, recovering migration cost in ~1 month.

We compared what Anthropic Mythos and OpenAI GPT-5.5-Cyber actually do on offensive testing tasks. Capabilities, refusal patterns, evals, and where each model breaks down.

The LLM observability category has 4 distinct tool types in 2026. Confusing a reverse proxy with an SDK tracer costs trace coverage — not just $59/mo.

Cursor Composer 2 (March 2026): $0.50/1M input tokens, code-only training, and a cache economy that cuts agentic loop costs by 10x — 5 changes for devs.

Anthropic's Mythos and OpenAI's GPT-5.5-Cyber both ship locked behind allowlists. Here's what's inside each model, who actually gets access, and what the rest of us can build today.

CodeRabbit shipped chat commands, path instructions, Mermaid diagrams, and ticket-context reviews to GA in April 2026 — 5 features worth enabling at $15/seat.