Claude Fable 5.1 and Claude Mythos 5.1(anthropic.com)

1332 points by denysvitali 1 month ago | 1269 comments

Anthropic documentation page describing new features, breaking changes, and capability improvements in Claude Fable 5.1 and Claude Mythos 5.1.

Claude: System Prompts(platform.claude.com)

727 points by tosh 2 months ago | 276 comments

Anthropic documentation page listing the core system prompts used by Claude on claude.ai and its iOS and Android apps, organized by model and date.

Claude Managed Agents Overview(platform.claude.com)

18 points by NicoJuicy 6 months ago | 9 comments

Prompting Claude Opus 5.5(platform.claude.com)

177 points by Michelangelo11 28 days ago | 191 comments

Anthropic's Claude Platform documentation page giving prompting guidance for Claude Opus 5.5, covering behavioral differences from Opus 5, effort calibration, thinking, and agentic tasks.

Claude Pro: Opus model will only be available if extra usage is enabled(support.claude.com)

49 points by yrds96 6 months ago | 21 comments

Claude Code SDK(docs.anthropic.com)

427 points by sync 1 year ago | 186 comments

Anthropic documentation page for the Claude Code SDK, which lets developers run Claude Code programmatically as a subprocess from their applications.

Apple's On-Device and Server Foundation Models(machinelearning.apple.com)

890 points by 2bit 2 years ago | 479 comments

Apple Machine Learning Research post introducing the on-device and server foundation language models behind Apple Intelligence.

Claude Sonnet will ship in Xcode(developer.apple.com)

463 points by zora_goron 1 year ago | 364 comments

Apple developer documentation page with the Xcode 26 Beta 7 release notes, covering new SDKs and features including Claude Sonnet integration.

Apple is open sourcing Swift Build(swift.org)

582 points by dayanruben 1 year ago | 254 comments

Swift.org blog post announcing that Apple is open sourcing Swift Build, the build engine used by Xcode, as a step toward unified cross-platform Swift build tools.

Ferret: A Multimodal Large Language Model(github.com)

576 points by weirdcat 2 years ago | 284 comments

GitHub repository for Apple's Ferret, a multimodal large language model, containing code, scripts, and released checkpoints.

Apple built iCloud to store billions of databases(read.engineerscodex.com)

441 points by gempir 2 years ago | 170 comments

Engineer's Codex newsletter post explaining how Apple uses Cassandra and FoundationDB to power CloudKit and store billions of iCloud databases.

Tree Borrows(plf.inf.ethz.ch)

557 points by zdw 1 year ago | 141 comments

ETH Zürich Programming Language Foundations Lab page for the PLDI 2025 paper Tree Borrows, an aliasing model for Rust by Villani, Hostert, Dreyer, and Jung.