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Redesigning source control at Anthropic
As our merges per day grew more than tenfold, source control became our biggest development bottleneck. Here, we share how we migrated to an in-house version control system in five months.
Anthropic
Anthropic is an AI safety and research company that's working to build reliable, interpretable, and steerable AI systems.
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Visit anthropic.com → On Hacker News May 2023 – Nov 2026
AI & Machine Learning 138Tech Industry & Business 59Software Engineering 30Security & Privacy 20Society, Policy & Culture 12Science & Space 12
32
Sonnet 5.5
Claude Sonnet 5.5 is a clear upgrade over Claude Sonnet 5, runs 30%+ faster, and costs up to 30% less for most work.
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Model Context Protocol
MCP is an open standard for connecting AI assistants to the systems where data lives, from content repositories to business tools.
34
Claude Opus 4.1
Claude Opus 4.1 is an upgrade over Opus 4 in agentic tasks, real-world coding, and reasoning.
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Claude Skills
Claude can now use Skills to improve how it performs specific tasks. Skills are folders that include instructions, scripts, and resources that Claude can load when needed. Claude will only access a skill when it's relevant to the task at hand.
36
Claude for Chrome
We're piloting Claude in Chrome to test browser-based AI capabilities while addressing prompt injection risks and building the safety measures needed before wider release.
37
Claude discovers a novel enzyme system with CRISPR-like repeats
In early results from our new life sciences research lab, Claude agents found an enzyme system whose function is still unknown.
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Formalizing Fermat's Last Theorem
Anthropic is an AI safety and research company that's working to build reliable, interpretable, and steerable AI systems.
39
Building Effective "Agents"
Practical guidance from Anthropic on building reliable AI agents, from simple composable patterns to fully autonomous systems.
40
Updates to Consumer Terms and Privacy Policy
Claude Free, Pro, and Max users can now opt in to having conversations used to improve models, with a five-year retention period for participants.
41
We tasked Opus 4.6 using agent teams to build a C Compiler
How a team of 16 parallel Claude agents wrote a Rust-based C compiler from scratch, capable of compiling the Linux kernel, and what it taught us.
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Claude Integrations
Claude can now connect to your apps and tools through Integrations, while advanced Research searches across the web, Google Workspace, and connected services to quickly deliver comprehensive reports.
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Claude Haiku 4.5
Claude Haiku 4.5, our latest small model, is available today to all users.
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Claude Advanced Tool Use
Claude can now discover, learn, and execute tools dynamically to enable agents that take action in the real world. Here’s how.
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Claude 3.5 Sonnet
Introducing Claude 3.5 Sonnet—our most intelligent model yet. Sonnet now outperforms competitor models and Claude 3 Opus on key evaluations, at twice the speed.
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Claude now has access to a server-side container environment
Describe what you need and get back ready-to-use spreadsheets, documents, presentations, and PDFs instead of just text responses. Update: Now generally available for paid plans with net network and egress controls (October 21, 2025).
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Where things stand with the Department of War
A statement from Dario Amodei
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Hardening Firefox with Anthropic's Red Team
Claude Opus 4.6 found 22 Firefox vulnerabilities in two weeks, 14 rated high-severity, with proofs-of-concept and candidate patches for Mozilla.
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Claude Code: Best practices for agentic coding
Get more out of Claude Code: tell Claude what it can't see, give it a check to run, and enforce the rules that can't have exceptions.
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Anthropic raises $13B Series F
Anthropic has completed a $13 billion Series F led by ICONIQ, co-led by Fidelity and Lightspeed, valuing the company at $183 billion post-money.
51
The Anthropic Economic Index
Announcement of the new Anthropic Economic Index and description of the new data on AI use in occupations
52
Claude's new constitution
A new approach to a foundational document that expresses and shapes who Claude is
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Claude Code on the web
Today, we're introducing Claude Code on the web, a new way to delegate coding tasks directly from your browser. Now in beta as a research preview, you can assign multiple coding tasks to Claude that run on Anthropic-managed cloud infrastructure, perfect for tackling bug backlogs, routine fixes, or...
54
Project Glasswing: An Initial Update
An early update on what we've learned from Project Glasswing.
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Claude Memory
Today, we’re introducing memory to the Claude app, where Claude remembers you and your team’s projects and preferences, eliminating the need to re-explain context and keeping complex work moving forward.
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Amazon will invest up to $4B in Anthropic
Amazon will invest up to $4 billion in Anthropic and become its primary cloud provider, with models trained on AWS Trainium and Inferentia.
57
Building Effective AI Agents
Practical guidance from Anthropic on building reliable AI agents, from simple composable patterns to fully autonomous systems.
58
Claude for Small Business
We're launching Claude for Small Business, a package of connectors and ready-to-run workflows that put Claude inside the tools small businesses use every day.
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When AI Builds Itself: Our progress toward recursive self-improvement
Our progress toward recursive self-improvement, and its implications.
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Anthropic acquires Stainless
Anthropic has acquired Stainless, a builder of SDK and MCP server tooling, to strengthen Claude's ability to connect to external data and tools.