Architecture
Skills and subagents: the agent reuse pattern
Skills package reusable capabilities; subagents isolate bounded-task execution. Together they form the most effective pattern for composing complex agents in 2026.
Tag
claude
Artificial Intelligence
Claude Sonnet 4.6 in production: the cost-quality balance
Claude Sonnet 4.6 is the default model for most 2026 production workloads: it covers 80% of traffic with quality indistinguishable from Opus 4.7 in blind tests, at roughly 60% of Opus per-token price. Opus is still needed for complex reasoning and agentic coding on large codebases.
Artificial Intelligence
Claude Opus 4.7 and long-horizon tasks: real changes
Opus 4.7 launched as Anthropic's most capable model, with emphasis on long-horizon agentic work. After two months of intensive use, these are the practical changes versus Opus 4.6.
Artificial Intelligence
Lessons from agents in production in 2025: summary for 2026
By late 2025, 57.3 percent of organizations had agents in production, up from 51 percent a year earlier, according to LangChain's survey of more than 1,300 professionals. Three failure modes dominate the postmortems: degenerative reasoning loops, hallucinated data in RAG systems, and silent misalignment between the request and the interpretation.
Architecture
Consolidated MCP ecosystem: a quick map for 2026
Twenty months after the initial announcement, Model Context Protocol went from curiosity to de-facto standard among agent clients and servers. What is available, which servers are worth it, which problems remain open, and how it compares to earlier protocol maps.
Artificial Intelligence
Computer Use in production: agents that drive the interface
Computer Use in production works today for narrow, repetitive interface tasks where a human still checks the result. Anthropic shipped it in October 2024 calling it experimental and error-prone, and nine months on that framing still holds: teams run it on real work by constraining scope, not by trusting it end to end.
Artificial Intelligence
Community MCP servers: which ones are worth it
After more than a thousand community MCP servers appeared, the shortlist worth keeping stays small. The five official Anthropic servers in daily use here are filesystem, git, read-only Postgres, fetch, and memory. Servers wrapping Slack, email, or broad SaaS APIs open more attack surface than they repay, and tool-chaining between servers remains unsolved.
Artificial Intelligence
Claude 3.7 Sonnet: the intermediate step toward the 4 family
Claude 3.7 Sonnet, released by Anthropic on February 24, is a careful refinement rather than a generational jump. The same model answers in standard mode or in an extended thinking mode you switch on per request, trading tokens and latency for better results on hard problems. It also ships Claude Code, a command-line tool for programmers.
Artificial Intelligence
Claude’s Computer Use: When the Agent Moves the Mouse
Computer Use is the Claude API feature, launched by Anthropic on 22 October 2024, that lets the model view screenshots and move the mouse, type, and click inside a loop your own system executes and controls. It works well on apps without an API and fails on CAPTCHAs, highly dynamic interfaces, and long tasks.
Artificial Intelligence
Claude 2: Anthropic’s Alternative to GPT-4
Claude 2, launched by Anthropic in July 2023, offers a 100,000-token context window and safety grounded in Constitutional AI. Against GPT-4 it wins on long-document analysis and wide-context code; GPT-4 remains ahead on complex mathematical reasoning and its tooling ecosystem.