Claude Report — 2026-07-02

🚀 Anthropic Official

Introducing Claude Sonnet 5 (Jun 30)

Launches as the new default model for Free and Pro plans (also on Max/Team/Enterprise) with a 1M-token context window, 128k max output tokens, and introductory pricing of $2/$10 per MTok input/output through Aug 31, 2026 (then $3/$15). Ships three breaking changes vs. Sonnet 4.6: adaptive thinking on by default, manual extended-thinking parameters now return a 400 error, and non-default sampling params (temperature/top_p/top_k) are rejected; a new tokenizer also produces roughly 30% more tokens for the same text.

Redeploying Fable 5 and Mythos 5 (Jun 30, effective Jul 1)

Lifts the export-control suspension on Claude Fable 5, restoring global availability from Jul 1 across Claude.ai, the Claude Platform, Claude Code, and Cowork, after deploying a cybersecurity classifier that blocks the reported jailbreak in over 99% of cases. Discloses that Mythos 5 — the same underlying model with fewer safeguards, distributed only to trusted "Project Glasswing" partners for defensive cybersecurity work — is also being restored, and jointly proposes a four-axis jailbreak-severity scoring framework (capability gain, breadth, weaponization ease, discoverability) with Amazon, Microsoft, and Google, backed by a 24/7 monitoring team and a HackerOne submission program.

Claude Science, an AI workbench for scientists (Jun 30)

Ships a beta macOS/Linux app for Pro/Max/Team/Enterprise integrating 60+ scientific databases and skills (genomics, proteomics, structural biology, cheminformatics), 3D protein/genome-track rendering, a built-in reviewer agent for citation/calculation validation, and full code provenance for figures; funds up to 50 "AI for Science" projects with up to $30,000 in credits each (applications due Jul 15).

Claude Code v2.1.197 (Jun 30)

Makes Claude Sonnet 5 the default model, wiring in the 1M-token context window and introductory $2/$10 per MTok pricing.

Claude Code v2.1.198 (Jul 1)

Claude in Chrome reaches general availability and background agents launched from claude agents now commit, push, and open a draft PR when they finish code work in a worktree instead of stopping to ask. Adds Notification-hook events for agents needing input or completing (agent_needs_input/agent_completed), a new /dataviz skill with a runnable color-palette validator, an anthropicAws Gateway upstream provider, and switches the built-in Explore agent from Haiku to inheriting the main session's model (capped at Opus); also fixes stuck background-task panels, non-refreshing /diff panels on branch switches, and failed-teammate status reporting in agent teams.

API changelog — Sonnet 5 launch and Fable 5/Mythos 5 restoration (Jun 30 – Jul 1)

Documents the Claude Sonnet 5 launch and migration notes on Jun 30, then the restoration of API access to Claude Fable 5 and Claude Mythos 5 on Jul 1.

anthropic-sdk-python v0.113.0 – v0.115.1 (Jun 29 – Jul 1)

v0.113.0 adds the 20260318 web-fetch/support tools and fixes an async count_tokens merge bug; v0.114.0 adds claude-sonnet-5 support; v0.115.0 adds Managed Agents event-delta streaming, per-session agent overrides, reverse pagination, vault credential injection-scoping, and agent/deployment webhooks; v0.115.1 is a cleanup release removing nonfunctional types.

anthropic-sdk-typescript v0.107.0 – v0.109.1 (Jun 29 – Jul 1)

Mirrors the Python SDK's web-fetch tool, claude-sonnet-5 support, and Managed Agents features across the same window, plus a v0.109.1 cleanup pass; companion vertex-sdk v0.19.0, bedrock-sdk v0.32.0, and aws-sdk v0.6.0 ship Jun 30 with auth/logger fixes.

🔌 Claude Code Plugins

Plugin tracking skipped — ranking cache unavailable this cycle.

🛠️ Skills

alirezarezvani/claude-skills

Merges PR #882 hardening the "deep-research" skill (from PR #851) and adds four new skills — local-seo-manager, zero-hallucination-coder, agent-decision-receipts, and a "roast" 5-angle adversarial idea panel — landing Jul 1.

Piebald-AI/claude-code-system-prompts

Tracks Claude Code's growing internal system prompt release-by-release: v2.1.196 (+1,869 tokens, Jun 29), v2.1.197 (+21,695 tokens, Jun 30), and v2.1.198 (+53,384 tokens, Jul 1).

glebis/claude-skills

Ships a "the-goal" Theory-of-Constraints diagnostic skill (Jul 1) and an i18n Studio skill teaching agents to drive document review, filters, and duplicate detection (Jul 2).

Unchanged in window: anthropics/skills, ComposioHQ/awesome-claude-skills

🤖 Agents & Subagents

nicobailon/pi-subagents

Ships v0.32.0 (Jul 1) adding a global default model config separate from parent sessions, aggregate child usage tracking via /subagent-cost, timeout enforcement across async/background runs, and a global concurrency limiter for parallel tasks.

anthropics/claude-agent-sdk-typescript

Ships v0.3.198 (Jul 1) adding a runtime warning when canUseTool is configured alongside allowedTools/bypassPermissions (which silently shadow the callback), a per-server request_timeout_ms option, and fixes for isSynthetic-to-isMeta mapping and dropped agents in workflow progress events.

anthropics/claude-plugins-official

Merges a new official idmp-plugin (PR #3389, Jul 1) alongside a wave of automated per-plugin version bumps (Jul 1–2) across sentry, mongodb, slack, postman, and others.

Unchanged in window: Chachamaru127/claude-code-harness, affaan-m/everything-claude-code

🔗 MCPs & Integrations

portainer/portainer-mcp

Releases v2.43.1 (Jul 2) adding a GitOps profile bundling git source-management operations and fixing JMESPath error diagnostics for double-escaped quotes in expressions.

Unchanged in window: mcp-python-sdk, modelcontextprotocol/typescript-sdk, awslabs/mcp, github-mcp-server

💡 Community — Workflows & Ideas

AgentWire ships three reliability releases (Jun 29–30)

The tmux-based multi-agent voice portal pushes v1.49.0 (F1 help modal, TTS sidebar fixes), v1.50.0–v1.50.1 (adaptive submit timing, idle-notification routing fixes), and v1.51.0 (agent-to-agent delivery reliability, bundled contributor onboarding role) in quick succession.

Sonnet 5's benchmark wins meet a rockier r/ClaudeAI reception (Jun 30)

Despite Sonnet 5 beating Opus 4.8 on some coding and knowledge-work benchmarks, community reports on r/ClaudeAI describe it as slower, quota-hungrier, and occasionally worse in practice — partly explained by the new tokenizer producing ~30% more tokens per request — prompting advice to benchmark on your own tasks before switching production traffic.

📰 Quick Mentions

• Claude Sonnet 5 GA in GitHub Copilot (Jun 30) — ships in Copilot CLI v1.0.67 for Pro/Business/Enterprise users, with strong internal scores on CLI-style tasks.
• Claude Sonnet 5 on AWS (Jun 30) — brings the model to Amazon Bedrock the same day as the Anthropic launch.