ANTHROPIC

Claude Code Projects is open to every waitlisted Pro and Max user. How the coordinator and cloud threads work, what it costs in plan limits, and where it breaks.

Anthropic's free year of Claude Team and $1,000 in API credits hit capacity within days. What the program page says now, what still works, and how to cover the gap.

ai-newtab turns your browsing history into a daily homepage using a Claude Managed Agents session driven from a Chrome extension. How the loop works, what it sends to the API, the cost claim, and the security gaps to close before you copy it.

Claude Haiku 4.5 submitted an invented tip to a police form during an Anthropic evaluation. The October 9 report lists four behaviors, and each one maps to a scoping mistake you can check in your own agent setup this week.

Anthropic launched OSS Scanner on October 8: opt-in, unreviewed vulnerability reports from its strongest models, free for eligible open-source projects. What the enrollment PR needs, what you receive, and the triage cost nobody is pricing in.

Both cost $20 a month. Plus meters Codex apart from chat and includes GPT-6 Astra; Claude Pro shares one pool with Claude Code. Which to pick.

Anthropic's own runs: a Fable 5.1 advisor added 1.7 points to Opus 5.5 for 2.1x the cost. When the Claude advisor tool pays, and when to raise effort instead.

Team seats ($25 or $125 a month), Enterprise ($20 plus API-rate usage) or the Console API? How to pay for Claude Code for a team, with 10-developer math.

Which cheap model belongs under your orchestrator? Haiku 5.5 vs GPT-6 Luna as a subagent or worker: routing by prompt length, compaction, tool-call gotchas and cost per agent task.

Anthropic now gives Max and Team plans a monthly Claude API credit: $100 on Max 5x, $200 on Max 20x, up to $500 pooled on Team. What it covers, what it does not, and how to claim it.

Sonnet 5.5 is the default, Opus 5.5 is for open-ended long-horizon work, and Haiku 5.5 is for bounded steps and subagents. Prices, benchmarks, cost math.

Claude Haiku 5.5 (claude-haiku-5-5) costs $0.10 input and $0.50 output per million tokens under 100K, with a 1M window and adaptive thinking. The pricing cliff, the tokenizer catch, and the ten migration steps from Haiku 4.5.

Anthropic's Frontier Red Team says GLM-5.3 builds working exploits at rates close to Claude Mythos Preview, and that its safeguards can be stripped in days. Here are the verified numbers, the community backlash, and the practical read for developers.

Claude Code is Anthropic's agent for software engineering; Claude Cowork is the same agent loop pointed at documents, spreadsheets, and research. Both come with every paid Claude plan from $17/month. Here is how to pick, with a verified September 2026 pricing table.

Claude Sonnet 5.5 costs $2/$10 per million tokens, and cache reads fell to $0.10 on October 7 - half of Opus 5.5 on every line. Pricing math and API changes.

Claude Opus 5.5 costs $4/$20 per million tokens with $0.20 cache reads. SDK examples, Claude Code setup, and when to pick it over Sonnet 5.5 or Haiku 5.5.

Anthropic says Claude worked largely autonomously for 11 days to formalize Fermat's Last Theorem in Lean. The developer lesson is less about one theorem and more about verified repo-scale research artifacts.

Anthropic confirms that every Claude model released after August 2, 2026 embeds a machine-readable watermark in generated text and attaches C2PA provenance metadata to generated files, across the API, Claude Code, Cowork, and Tag. Detection tooling for third parties is coming, but details are not published yet.

Anthropic retuned Claude Fable 5's biology classifiers on August 7, cutting biology-related fallbacks by about 85% while keeping dual-use domains like virology, toxicology, and molecular design routed to Opus 5. Here is what changed, what stays blocked, and what it means for Claude Code and API users.

How much of an AI session can you actually take with you? Store defaults, encrypted reasoning, opaque compaction, hidden search, and subagent ciphertext compared across OpenAI, Anthropic, and Gemini - all verified against live docs.