Articles tagged "Anthropic"

**Anthropic has launched a 12-day promotional access window for Claude Fable 5 from 2026-07-01 to 07-12** ([official support article](https://support.claude.com/en/articles/15424964-claude-fable-5-promotional-access)). **Pro / Max / Team subscribers** and **Premium seats on seat-based Enterprise plans** (where admins enable it) can use Fable 5 at **no extra cost**. Usage is drawn from regular weekly subscription limits, with **up to 50% of your weekly limits available on Fable 5 for free**. Beyond that, buy additional usage via credits or switch to other Claude models. **Supported surfaces**: [Claude web](https://claude.ai), Mobile, Desktop, **Cowork** ([this week's web/mobile expansion](../columns/claude-cowork-web-mobile-launch-2026-07)), Code, Design, Microsoft 365, Teams, and Tag. **API access is excluded** (billed at standard rates); **Free plans and standard Enterprise seats are also excluded**. After the promo ends (**2026-07-12 23:59:59 PT**), Fable 5 goes back to separate billing via usage credits. **Admin controls**: organizations cannot disable promotional access in the web / mobile / desktop clients, though Claude Code access can be restricted through managed settings. Sits alongside our [Claude Fable 5 return column](../columns/claude-fable-5-return-devin-cursor-2026-07) and [Claude Sonnet 5 release column](../columns/claude-sonnet-5-anthropic-release-2026-06-30) as a key piece of Anthropic's July 2026 strategy.

**Anthropic expanded Claude Cowork to web and mobile on 2026-07-07** ([official blog post](https://claude.com/blog/cowork-web-mobile/)). The AI-agent platform that used to be desktop-only is now usable from **[Claude web (claude.ai)](https://claude.ai) and the iOS / Android apps**. Cowork isn't a Q&A agent — it **accesses files, calendar, email, messaging, the web, and other connected tools to complete whole projects**. **Three core capabilities**: **(1) Cross-Device Continuity** — start a task at your desk, check on it from your phone, pick up the finished output anywhere; **(2) Background Processing** — tasks continue even when devices are closed, with scheduled runs (e.g., Monday-6AM client prep runs overnight); **(3) Human-in-the-Loop Decisions** — when only you can decide something, Cowork pings your mobile, so you can steer mid-workflow. **Use cases**: software development is **under 10% of usage**; business operations (reconciling quarterly spend, variance reporting), content creation (turning transcripts + data into client decks), and contract management (turning folders into risk-flagged renewal trackers) together account for about **50% of usage**. **Platform shifts**: desktop-only → web / mobile / desktop; work stops when the device closes → **background continuation**; chat and Cowork were separate → **a unified home with shared projects**. **Rollout**: starting with Max users and expanding to other plans over several weeks. **Usage limits are doubled through 2026-08-05**. Start on web from claude.ai's home screen; on mobile via the Claude app sidebar. Coordinated with the [Claude Fable 5 promo](../columns/claude-fable-5-promotional-access-2026-07) and [Claude Sonnet 5 release](../columns/claude-sonnet-5-anthropic-release-2026-06-30) as one of the **three pillars of Anthropic's July 2026 strategy**.

**Anthropic's Claude Fable 5 and Mythos 5 returned globally on July 1, 2026** after a 19-day shutdown ([CNBC](https://www.cnbc.com/2026/06/30/anthropic-says-trump-admin-has-lifted-export-controls-on-claude-fable-5-and-mythos-5.html) / [9to5Mac](https://9to5mac.com/2026/07/01/claude-fable-5-cleared-to-return-as-us-lifts-anthropics-export-control-restriction/) / [VentureBeat](https://venturebeat.com/technology/anthropic-is-bringing-back-claude-fable-5-globally-after-us-lifts-export-control-order-where-can-enterprises-access-it) / [The Hacker News](https://thehackernews.com/2026/07/anthropic-restores-claude-fable-5-after.html)). **Timeline**: on **June 12 at 5:21 PM ET the U.S. government issued an export-control directive** (directly triggered by [Amazon researchers reporting a jailbreak](../columns/claude-fable-5-export-control-suspension-2026-06)) → Anthropic immediately **shut down Fable 5 and Mythos 5 worldwide** (it had no way to verify user nationality in real time) → **June 26: Mythos 5 was cleared for 100+ U.S. institutions** → **June 30: the Commerce Department lifted controls** → **July 1: global restoration** across Claude Platform / Claude.ai / Claude Code / Claude Cowork / AWS Bedrock / Google Vertex AI / Microsoft Foundry. **Anthropic's mitigations**: the Amazon-reported jailpath was addressed, commitments to "proactively detect and address security risks," collaboration with government on future release protocols, and a reporting channel for observed malicious use. **Fable 5 pricing**: **$10 / M input, $50 / M output** (per apidog). Pro / Max / Team / Enterprise subscribers get an extra allocation up to **50% of their weekly usage limits through July 7**, then usage-credit billing. **Cursor integration**: Cursor officially announced Fable 5 was back at **7:48 PM PT on July 1** on X. "Leads all models on CursorBench — but the most expensive per task," per Cursor ([Cursor Community Forum](https://forum.cursor.com/t/will-fable-5-be-returning-in-cursor/164531) / [apidog setup guide](https://apidog.com/blog/claude-fable-5-cursor/)). **Devin Fusion**: before the shutdown, **Devin Fusion + Fable 5 achieved a 41% cost reduction over Fable 5 alone** using a parallel two-agent architecture, delivering frontier-level performance at **~35% lower cost** (The New Stack). **Enterprise lessons from the 19-day outage**: financial services, healthcare, SaaS, and critical-infrastructure firms lost access to production-embedded tools without warning. The phrase **"frontier access is now conditional infrastructure"** entered the discourse. **Cloud-platform diversification (AWS + GCP + Azure) offers no protection when the model itself is restricted**. OpenAI reportedly **expanded market share** during Anthropic's outage through pre-clearance dealings with regulators (MarketScale). **Strategic context**: [Anthropic released Sonnet 5 on June 30](../columns/claude-sonnet-5-anthropic-release-2026-06-30) — the same day export controls lifted. The timing looks intentional: **Sonnet 5 is positioned as a fallback to Fable 5**, and heading into its IPO, Anthropic now has a clear **two-tier stack** — frontier Fable 5 for peak capability + mid-tier Sonnet 5 for cost-efficient volume.

**Anthropic released Claude Sonnet 5 on June 30, 2026** ([official release](https://www.anthropic.com/news/claude-sonnet-5) / [System Card](https://www.anthropic.com/claude-sonnet-5-system-card) / [TechCrunch](https://techcrunch.com/2026/06/30/anthropic-launches-claude-sonnet-5-as-a-cheaper-way-to-run-agents/) / [VentureBeat](https://venturebeat.com/technology/anthropic-launches-claude-sonnet-5-at-a-steep-discount-to-its-top-model-as-the-company-races-toward-a-blockbuster-ipo)). **The headline: the mid-tier Sonnet just leapfrogged Opus 4.6 by 12 points** — **92.4% on SWE-Bench Verified** (Opus 4.6 was 80.8%), **88.3% on OSWorld-Verified** (15.9 pts ahead of the 72.4% human-expert baseline), **96.2% on GPQA Diamond** (over [Gemini 3.1 Pro's](../columns/local-llm-landscape-2026-june-update) 94.3%), and **84.7% on ARC-AGI-2** (7.6 pts ahead of Gemini 3.1 Pro's 77.1%). It ships with a **1M-token context window** (matching Opus 4.8) and a 128K max output. **Strategic pricing on the eve of Anthropic's IPO**: **introductory $2 / M input and $10 / M output through August 31, 2026**, after which standard pricing becomes **$3 / $15** (matching [Sonnet 4.6](../columns/claude-agent-sdk-credit-billing-change-2026-06-15)). Note: **a new tokenizer maps the same input to about 1.0–1.35× more tokens**. It undercuts GPT-5.5, Gemini 3.1 Pro, and Anthropic's own Opus 4.8 on price. **Default-model rollout**: now the **default in claude.ai Free and Pro**, **default in Claude Code Pro**, and available via API (`claude-sonnet-5`), AWS Bedrock, Vertex AI, and Managed Agents. Zapier's Daniel Shepard told TechCrunch that **"earlier Sonnet versions would stall on multi-step tasks — Sonnet 5 finishes them end-to-end."** **Safety**: lower misalignment than Sonnet 4.6, cyber safeguards on by default, and a **0.0% exploit-creation rate** on Firefox vulnerability tests. **Strategic context**: agentic capability is now "table stakes" across foundation-model companies; competition has shifted to **cost-efficiency, reliability, and autonomous-task completion**. Heading into its IPO, Anthropic is breaking the boundary between its Opus and Sonnet tiers to **win the cost / performance contest in high-volume production workloads**.

A primary-source deep dive on **Loop Engineering**, the June 2026 AI-engineering trend named and codified by Google Chrome DevRel lead **Addy Osmani** in his ["Loop Engineering" blog post](https://addyosmani.com/blog/loop-engineering/) and elevated to industry attention by Anthropic Claude Code lead **Boris Cherny's** quote — **"I don it prompt Claude anymore. I have loops running that prompt Claude and figuring out what to do. My job is to write loops."** ([reported by The New Stack](https://thenewstack.io/loop-engineering/)). Covers the four-generation lineage: Prompt Engineering (2022-2024) → Context Engineering (2025, coined by Shopify CEO Tobi Lütke, formalized in [Anthropic's Effective Context Engineering for AI Agents](https://www.anthropic.com/engineering/effective-context-engineering-for-ai-agents)) → Harness Engineering (early 2026) → **Loop Engineering (June 2026 onwards)**. Grounded in Peter Steinberger's seed phrase — **"you should be designing loops that prompt your agents"** — the column maps out the six building blocks: (1) Automations / Trigger (timer- or event-driven heartbeats), (2) Worktrees (isolated git checkouts to prevent parallel sub-agent collisions), (3) Skills (SKILL.md / CLAUDE.md to externalize intent and reduce "intent debt"), (4) Plugins / Connectors via MCP (execution permissions), (5) Maker / Checker Sub-agents (separating generation from verification), and (6) Durable State (memory belongs on disk, not in context). Explains Inner Loop vs Outer Loop, how Claude Code's `/goal`, Automations, Worktrees, Skills, and Sub-agents constitute a ready-made Loop Engineering toolkit, the surge of Japanese coverage on Qiita / Zenn / DevelopersIO / note / OptiMax, and the five major risk vectors: Cognitive Surrender (Osmani's central warning), Loop Brittleness, Verifier mis-grading, HITL approval fatigue, and runaway-loop cost explosion.

**June 16, 2026 Update**: On the very day of enforcement (June 15, 2026), Anthropic **paused the planned split of Claude Agent SDK, `claude -p`, GitHub Actions, and third-party app (OpenClaw, Zed, Conductor, etc.) usage from subscription rate limits**. The [official Help Center article](https://support.claude.com/en/articles/15036540-use-the-claude-agent-sdk-with-your-claude-plan) was amended with: "Update June 15: We are pausing the changes to Claude Agent SDK usage described below. For now, nothing has changed: Claude Agent SDK, `claude -p`, and third-party app usage still draw from your subscription is usage limits. The previously announced monthly credit, which would have been available to eligible claimants in connection with these changes, isn it available. We are working to update the plan to better support how users build with Claude subscriptions. When we have an update, we will share it before anything takes effect." **The previously announced monthly credits (Pro $20 / Max 5x $100 / Max 20x $200 / Team $20-100 / Enterprise $200) were not distributed**. Programmatic usage now once again draws from standard subscription limits. The change is officially a **pause, not a full rollback** — Anthropic says it is reworking the plan and will share details before anything new ships. The backlash that triggered this was substantial: [community estimates](https://gist.github.com/MagnaCapax/d9177e35b355853f03c730dfcaa693ef) projected effective price hikes of 12-175x against API-rate equivalents, Anthropic engineer Lydia Hallie was quickly Community-Noted on X, and Reddit r/ClaudeAI, HN, and [The New Stack](https://thenewstack.io/anthropic-agent-sdk-credits/) all carried critical coverage. This is Anthropic is **third subscription-policy reversal of 2026** (January OAuth block reversed within days, April 4 third-party agent ban reversed within 24 hours, and now the May 14 compromise credit pool paused on its June 15 enforcement day). This column preserves the original announced design while adding a detailed reversal section: timeline, operational implications, and the current validity of the "turn Extra Usage auto-billing off" guidance.

On June 12, 2026 at 17:21 ET, Anthropic received an export control directive from the US Department of Commerce Bureau of Industry and Security (BIS) and immediately suspended Claude Fable 5 and Mythos 5 for all customers. Issued just three days after the models' release, this marks what multiple outlets describe as the first publicly known instance of direct US federal government intervention in a commercially deployed frontier AI model. This column covers the legal nature of the directive, the government's rationale and Anthropic's rebuttal, impact scope across API, Bedrock, and Vertex, alternative model options, and practical implications for Japanese enterprises.

A grounded read of **Claude Fable 5** and **Claude Mythos 5**, officially announced by Anthropic on June 9, 2026 ([release post](https://www.anthropic.com/news/claude-fable-5-mythos-5), [Fable](https://www.anthropic.com/claude/fable), [Mythos](https://www.anthropic.com/claude/mythos)). The two share an identical base model — Fable ships publicly with safeguards, Mythos is restricted to vetted partners. The release introduces a new top tier above Opus / Sonnet / Haiku — the **"Mythos class"**. Pricing is **$10 input / $50 output per 1M tokens** (under half of Mythos Preview); cybersecurity, bio-chemical, and distillation-attempt queries are detected and **auto-routed to Claude Opus 4.8** (firing on under 5% of sessions); Hex's core analysis benchmark hit **90% for the first time ever**; and Mythos 5 itself is gated to **Project Glasswing**-vetted cyber defenders and biomedical researchers.

A practical, docs-grounded guide to Claude Code's Agent View — the multi-session dashboard Anthropic released on May 11, 2026. Covers parallel dispatch, automatic git-worktree isolation, background sessions, billing implications, and runaway-cost guardrails for serious team use.

A grounded guide to the Forward Deployed Engineer (FDE) role pioneered by Palantir and now being mass-hired by OpenAI, Anthropic, Cursor, and even Big-4 consulting firms in 2026. Covers origin, scope, skills, compensation, career paths, how FDE differs from SES/SI and from generic consultants, and where this role fits for Japanese enterprises trying to ship AI beyond the PoC stage.

Anthropic released Claude Opus 4.7 to general availability on April 16, 2026. This summary covers the official talking points: notable software-engineering gains over Opus 4.6, high-resolution image input up to 2576px / 3.75MP, the new Task Budgets feature for agentic loops, availability across AWS Bedrock / Vertex AI / Microsoft Foundry, and unchanged pricing at $5 / $25 per MTok.

A comprehensive guide to Claude Design, released by Anthropic Labs on April 17, 2026. Learn the features, usage, and pricing of the AI design tool that instantly generates mockups and presentations from text prompts.

Released April 16, 2026, Claude Opus 4.7 achieves SWE-bench Verified 87.6%, Vision accuracy 98.5%, and introduces the new xhigh Effort Control — all at the same price as Opus 4.6. This guide covers every major upgrade to Anthropic's latest flagship model.

Starting April 4, 2026, Anthropic restricts Claude subscription (Pro/Max) usage quotas from third-party harnesses like OpenClaw. Comprehensive guide covering impact scope, extra usage options, and developer response strategies.

Anthropic's Claude Code Channels, announced March 20, 2026, enables developers to message Claude Code directly via Discord or Telegram for code generation and editing. This article explores its impact on remote and asynchronous development workflows.

On March 12, 2026, Anthropic announced the Claude Partner Network with $100M investment. Business subscriptions grew 4.9% MoM while OpenAI fell 1.5%. With 30,000 Accenture consultants trained on Claude, integration opportunities for IT service providers are rapidly expanding.

Launched in February 2026, Claude Cowork transforms Claude from a conversational AI into an autonomous digital coworker. This guide covers direct file system access, multi-step task execution, and Excel/PowerPoint creation capabilities of this revolutionary new mode.

Announced on March 9, 2026, Copilot Cowork is an M365 multi-step task execution agent powered by Anthropic Claude. It orchestrates Outlook, Teams, Excel, and PowerPoint, evolving from Q&A to execution. Work IQ enables automatic context building from emails, meetings, and files.

Claude Code by Anthropic is an agent-based development tool that autonomously codes by understanding entire codebases. Available via CLI, IDE, Desktop, and Web. Complete 2026 guide covering Opus 4.6, MCP, Agent Teams, and advanced features.