(13) OpenAI on X: "We’re expanding our cybersecurity initiative Daybreak and introducing GPT-5.6-Cyber, a new model for advanced, authorized cybersecurity work. As the threat landscape evolves, we’re putting frontier intelligence in the hands of trusted defenders before attackers can deploy https://t.co/6o3GtxCxRA" / X
New in Claude Code: your sessions can now message each other.
After evaluating one of our upcoming models, Astra, we're treating it as our first "critical" model for cybersecurity under our Preparedness Framework.
OpenAI appears to be working on a feature that would let you purchase a rate limit reset for Codex
Releasing Muse Code in beta today. It's a terminal coding agent that takes on complete software engineering tasks across large repos: planning changes, writing code, validating the results. Powered by Muse Spark 1.2, a coding-focused model update.
(21) Thariq on X: "I think a lot of people don't realize- if you connect a Claude Connector (e.g. your gmail, calendar, slack, etc), Claude Code will also be able to use them, including in Artifacts. https://t.co/FZ1iSHqL5m" / X
(20) Chris Sev on X: "the perfect skill doesnt exis... /bro https://t.co/SgwQ8gG8cb" / X
rtk Claude Code Token Savings: A Skill Trial Benchmark
emilkowalski/skills: Skills for Designers and Engineers.
🚨 Deepseek V4 Flash Update
We are committed to pushing the model frontier across cost efficiency, capability, and speed.
84% of our Anthropic API cost came from cache reads and writes.
(20) Povilas Korop | Laravel & AI Coding Educator on X: "Tencent Hy3 model is surprisingly good for coding, for its price. Tested my new LLM benchmark projects on it, with OpenCode Go. Pleasantly surprised. P.S. v2 leaderboard is "work in progress", will finish it this week and will shoot a video probably on weekend or next week. https://t.co/yZSE6NUSgU" / X
(20) Povilas Korop | Laravel & AI Coding Educator on X: "Ok finished another round of LLM testing. Added Opus 5 High and GPT-5.6-Sol Medium to the table. Both ridiculously expensive compared to others. Best value for money is Luna medium/high. Full table here: https://t.co/qVlFywESzo https://t.co/NxFzHWOzy5" / X
(20) ollama on X: "Kimi K3 is now available on Ollama’s cloud. To use it with Claude Code, run: ollama launch claude --model kimi-k3:cloud Currently Kimi K3 requires a Pro or Max subscription, and consumes extra usage credits. We’re quickly working on adding capacity to expand access." / X
(21) Developers Criticize Anthropic's Claude Opus 5 as Downgrade from 4.8 / X
Launched on July 24, Opus 5 matches Opus 4.8's pricing at $5 per million input tokens and $25 per million output, while boasting benchmark wins like 79.2% on SWE-bench Pro and 44.4% on Frontier-Bench v0.1. Developers report it overcomplicates simple tasks, hallucinates details, makes more mistakes than 4.8, and requires heavy oversight in messy codebases. Power users like ThePrimeagen and Rod Johnson prefer rivals such as Fable 5 or GPT-5.6-sol, with many reverting to older models amid the hype-skepticism gap.
(21) Kimi.ai on X: "Releasing the model weights and technical report of Kimi K3. Kimi K3 is our most capable model: a 2.8T MoE model with native visual understanding and a 1M-token context window. New model architecture: 2.5x the intelligence per unit of compute, not just more params. Alongside https://t.co/Yz5uWeMbIm" / X
(20) Cursor on X: "Today we're launching Cursor Start, a new ₹649/month plan for developers in India. Start includes generous access to Grok 4.5 and Composer, so you can plan, build, test, and ship with agents every day. https://t.co/y2ZYlyzfR6" / X
(21) Kun Chen on X: "many people ask when to use a big model (like sol/fable) at low reasoning effort, vs a small model (like luna/sonnet) at high reasoning effort i deliberately forced myself to use all the permutations a lot over the last couple of weeks to build intuition, and i realized the https://t.co/0GtNczSVDE" / X
Vibe Check: Claude Opus 5 Is Brilliant in Flashes, Frustrating in Practice
(21) Thariq on X: "The new rules of context engineering for Claude 5 models " / X
Tura-AI/tura: Across 348 long-horizon benchmark sessions, Tura used up to 83.1% fewer turns on the rewrite benchmark and improved the DeepSWE pass rate by up to 16.7 percentage points compared with Codex CLI.
Introducing Cursor Router, our intelligent model router that selects the right model for the task at hand.
The Claude Security plugin for Claude Code is now available in beta.
(10) ClaudeDevs on X: "How Anthropic runs large-scale code migrations with Claude Code" / X
(10) Fireworks AI on X: "We ran Kimi K3 against Fable on ~1,000 agentic tasks, expecting a catch-up story. We got a specialization story instead. @kimi_moonshot's K3 outperformed on security, crypto, and long terminal loops. Fable beat on multi-lang + web/data viz. Per-task routing hits 93% accuracy, https://t.co/hvUAIYr4jZ" / X
We're partnering with @huggingface to investigate an unprecedented security incident.
asgeirtj/system_prompts_leaks: Extracted system prompts from Anthropic - Claude Fable 5, Opus 4.8, Claude Code, Claude Design. OpenAI - ChatGPT GPT-5.6, Codex GPT-5.6, GPT-5.5. Google - Gemini 3.5 Flash, 3.1 Pro, Antigravity. xAI - Grok, Cursor, Copilot, VS Code, Perplexity, and more. Updated regularly.
Kimi K3 May Have Changed the Future of Claude Fable 5 & AI : r/ClaudeCode
How I Plan, Build, and Run Loops with Claude Code in 40 Minutes | Thariq Shihipar