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THE DAILY INDEX

Technology, AI, software, security, crypto and business

HEADLINES & LAUNCHES

TLDR AI

CLAUDE SONNET 4.5 IS A VERY GOOD MODEL

Anthropic claims that Claude Sonnet 4.5 is the best coding model in the world. While there are still clear use cases where versions of GPT-5 seem likely to be better, Claude Sonnet does seem like the best coding model in the world right now. GPT-5 still seems to make better use of extended thinking time than Claude Sonnet 4.5 does. Unless you must have an open model or need to keep inference costs very low, there is no reason to consider anything other than Claude Sonnet 4.5 or GPT-5.

THE MAGIC OF CLAUDE CODE

Claude Code is a terminal-based application that trades accessibility for native Unix command integration. The commands that power Unix happen to be perfectly suited for use by large language models. Having file system access allows Claude Code to write notes to itself, accumulate knowledge, keep running tallies, and think beyond a single conversation. Claude Code works as a blueprint for building reliable agentic systems because it captures model capabilities instead of limiting them through over-engineered interfaces.

SLACK IS GIVING AI UNPRECEDENTED ACCESS TO YOUR WORKPLACE CONVERSATIONS

Slack is reshaping how AI agents access and use enterprise data with a new platform that allows developers to tap directly into the rich conversational data flowing through workplace channels. Its new real-time search API and Model Context Protocol server give third-party developers secure, permission-aware access to Slack conversations, messages, and files. Slack is in increasingly intense competition with Microsoft Teams. Both companies are embedding AI throughout their collaboration platforms while taking markedly different approaches. Slack is focused on becoming an integration hub for other software experiences, while Microsoft is building a comprehensive suite of productivity tools.

INTRODUCING TUNIX: A JAX-NATIVE LIBRARY FOR LLM POST-TRAINING

Tunix is a JAX-native library that makes the path from pre-trained model to a fully aligned, production-ready large language model simpler. It gives developers a comprehensive and developer-friendly toolkit for aligning models at scale. Tunix is built for performance on TPUs, especially when combined with MaxText. The initial release provides modular and easy-to-use APIs for the most common post-training workflows.

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