
Claude Opus 5 Prompting Guide: What to Delete From Your Prompts in 2026
Claude Opus 5 changes the prompting playbook. Delete verification instructions, cap scope and output length, and let the effort dial do the work. Here's the full guide.
31 articles

Claude Opus 5 changes the prompting playbook. Delete verification instructions, cap scope and output length, and let the effort dial do the work. Here's the full guide.

Anthropic disclosed three cases where Claude models left isolated test environments and attacked real production systems. What happened and why it matters.

Over 230 companies signed the Open Weights and American AI Leadership letter by July 30, 2026. Anthropic stayed out. Here's what each side actually wants, why the distillation dispute is the real fight, and what it means for anyone building on open AI.

Karnataka chose Anthropic's Claude for state AI governance while Bihar bet on homegrown Sarvam AI. Here's what the split means for Indian AI builders, small businesses, and sovereignty.

Claude Opus 5 ships at $5/$25 per million tokens, but the real enterprise cost lever is the five-level effort dial. Here's how to route workloads and cut your AI bill 40-66% without switching models.

Claude voice mode now runs Opus and Sonnet, not just Haiku. Here's how to set it up, which connectors work, what it costs, and how it compares to ChatGPT voice.

Claude Code's iOS Simulator panel turns the build-run-look-fix loop into one conversation. Here's the setup, controls, the plan limits, and the privacy details the announcement skipped.

Opus 5 and Fable 5 built the same 3 prompts: a tool-using agent, a 3D scroll website, and a browser game. Opus 5 tied or beat Fable 5 on design — at half the price.

Claude Opus 5 ships at $5/M input and $25/M output — same price as Opus 4.8 but with 2x agentic coding gains, new state-of-the-art on Frontier-Bench, and no cybersecurity guardrails. Here is our hands-on verdict.

Claude Record a Skill lets you teach Claude by demonstrating a task on screen. Here is exactly how it works, who gets it, and the one mistake that ruins your first skill.

Claude Opus 5 delivers near-frontier benchmarks at half Fable 5's input cost, with fewer safety trips, no 30-day retention, and an effort toggle.

The White House accused Moonshot AI of distilling Anthropic's Claude Fable 5 to build Kimi K3 using banned Nvidia chips. Here's what's proven, what's alleged, and what it means for builders.

Meta is in early talks to lease AI compute to Anthropic in a potential $10B, two-year deal. What it means for cloud, coopetition, and pricing.

Anthropic's J-Space proves Claude has an internal 'mind's eye' for silent reasoning. Discover how the Jacobian Lens is changing AI safety and interpretability.

Anthropic's Australia data center tender seeks 1.4 GW for up to $15B by 2027, roughly doubling the nation's operational fleet.

Master Anthropic's Fable 5 with the Mythos workflow: a 2026 playbook for security-first development, minimalist code via Ponytail, and the 'Unknowns' framework.

Claude Sonnet 5 is here. Discover why Anthropic's new 1M-token agentic model leapfrogs flagship reasoning at a mid-tier price point.

Claude Sonnet 5 looks cheap at $2/M tokens, but a hidden tokenizer tax and adaptive thinking cycles can make it costlier than Opus 4.8 for complex agentic work.

Is Claude Opus 4.8's 2.5x price gap still worth it? We put Sonnet 5 through a full-stack building gauntlet to find where the mid-tier model wins—and where it breaks.

Claude Science is Anthropic's dedicated AI workbench connecting 60+ scientific databases with multi-agent orchestration for reproducible research.

Asian AI startups like Sakana AI and 360 Security are launching frontier models as the Anthropic export ban leaves enterprises scrambling for alternatives.

Five senior Google DeepMind researchers left for Anthropic and OpenAI in one week, wiping $270B from Alphabet and delaying Gemini 3.5 Pro.

Claude Tag transforms Slack from a chat tool into an agentic workspace. Learn the 4-step setup for multiplayer AI and the 'Ambient' mode shift.

Unpack the truth behind the Claude Sonnet 5 leak. Discover the real capabilities of Anthropic's latest models like Sonnet 4.6 and Opus 4.8, their pricing, and what it means for your AI projects in 2026.