Documentation Update Tracker

This page tracks all major updates, revisions, and additions to the AI Developer Toolkit Guide, helping you stay current with the latest information and identify what’s changed.

Latest Updates

July 2026 - Latest Updates

July 8–11 wave - OpenAI shipped the GPT-5.6 Sol/Terra/Luna family and integrated Codex into the ChatGPT desktop app; Codex CLI reached 0.144.1. Cursor shipped 3.11 and jointly trained Grok 4.5 with SpaceXAI while keeping Composer 2.5 available. Claude Code reached 2.1.207, with account/provider-specific defaults, durable background agents, Routines, dynamic workflows, and current /effort controls.

July 14–19 follow-up - Claude Code reached 2.1.215 (explicit /verify + /code-review skills, the EndConversation tool, /fork to background sessions, screen-reader mode, and Windows PowerShell permission hardening). Codex CLI reached 0.144.6 (stronger dangerous-command detection; GPT-5.6 Sol/Terra/Luna corrected to a 272K working context). Cursor added Slack multi-repo environments and plan-before-start on the 3.11 line.

July 24 wave - Anthropic shipped Claude Opus 5, now the default Opus at Opus 4.8’s $5/$25 pricing and half of Fable 5. It requires Claude Code v2.1.219+, tops the Artificial Analysis Intelligence Index, and carries a May 2026 knowledge cutoff. Two API breaking changes: thinking is on by default, and disabling it is capped at high effort. v2.1.219 also adds category-based fallback — cybersecurity-flagged requests re-run on Opus 4.8, while biology-flagged Opus 5 requests end in a refusal.

Claude Fable 5 - The highest-capability tier remains an explicit selection, not an automatic account default. Its billing settled on July 20, 2026: permanently included on Max and Team Premium at up to 50% of weekly usage limits, with Pro and Team Standard on usage credits.

Verification baseline - Model, pricing, context, effort, and fallback-routing claims were rechecked against Anthropic’s models overview, pricing page, Claude Code model-config docs, and the Artificial Analysis Opus 5 analysis on July 27. Earlier tool-changelog and acquisition-status claims were verified against upstream on July 20.

May 2026 - Latest Updates

Claude Opus 4.8 (May 28) - New flagship, ~4× fewer unflagged code flaws; dynamic workflows + ultracode (research preview, v2.1.154+); /workflows; fast mode 2×/2.5×; lean system prompt default

Claude Code v2.1.144–154 - /resume for background sessions and claude agents --json; /simplify and /code-review are distinct in the current command set

Cursor 3.3–3.5 + Composer 2.5 - PR review, Build in Parallel, full-screen tabs, Composer 2.5 ($0.50/$2.50; fast $3/$15), Jira integration, shared canvases, Automations in the Agents Window

Codex CLI v0.131–0.135 - codex doctor, goals on by default, history search, --profile standardization, and codex remote-control foreground; GPT-5.5 was the default at that historical point

April 2026 - Latest Updates

Cursor 3.0 - Agents Window, Design Mode, Agent Tabs, /worktree, /best-of-n, enterprise features

Claude Code v2.1.84–92 - PowerShell tool (Windows), Bedrock setup wizard, /powerup command, per-model cost breakdown, conditional hooks

ChatGPT desktop (then Codex App) & CLI - Thread search, theming, revamped automations (local/worktree), first-class plugins, sub-agents

Changelog links:

Cursor: https://cursor.com/changelog
Claude Code: https://github.com/anthropics/claude-code/releases

March 2026 - Major Model and Platform Updates

GPT-5.4 released - First general-purpose model with native computer-use, 1M context, default across all Codex/ChatGPT surfaces

Cursor Composer 2 - Frontier coding model (MoE on Kimi K2.5), $0.50/$2.50 per 1M tokens

Codex Security - Application security agent in research preview, 1.2M commits scanned, 792 critical findings

Cursor Automations - Always-on agents with event triggers (Slack, Linear, GitHub, PagerDuty)

Cursor Self-Hosted Cloud Agents - Enterprise: code stays in customer infrastructure

August 2025 - Model Updates

GPT-5 guidance added across model selection, configuration, comparison, and FAQ.

Positioning: Great for one-shot app creation from detailed PRDs; experienced developers may still prefer Opus for architecture/planning depth
Source: https://cursor.com/blog/gpt-5

July 2025 - Major Release

Version 1.0.0 - Initial comprehensive release

Complete guide for Cursor and Claude Code
200+ articles across all sections
Enterprise development patterns
MCP ecosystem integration
Comprehensive appendices

Version History

Major Additions:

Complete Cursor documentation (100+ articles)
Complete Claude Code documentation (100+ articles)
Shared workflows section
Enterprise development guide
MCP ecosystem documentation
Comprehensive appendices

Key Features:

PRD → Plan → Todo methodology
100 tips for each tool
Model comparison guide
Pricing calculator
Migration checklists

Content Update Log

July 2026 Updates

Date	Section	Changes	Impact
2026-07-27	Models	Added Claude Opus 5 as the default Opus across model, pricing, routing, and effort guidance; recast Opus 4.8 as the previous tier and cyber-refusal fallback target	High
2026-07-27	Models	Corrected Fable 5 plan access (permanently included on Max/Team Premium at 50% of weekly limits since July 20), Gemini 3.1 Pro’s above-200K price tier, and the Opus 4.8 effort default	Medium
2026-07-20	Claude Code	Added v2.1.208–215 (explicit `/verify` + `/code-review`, `EndConversation` tool, `/fork` to background sessions, screen-reader mode, permission hardening)	Medium
2026-07-20	Codex	Added v0.144.2–0.144.6 (stronger dangerous-command detection; GPT-5.6 272K working context)	Medium
2026-07-20	Cursor	Added July 17 Cursor-in-Slack update (plan-before-start, multi-repo environments)	Low
2026-07-20	Models	Clarified GPT-5.6 ~272K Codex working context vs 1.05M API context	Low
2026-07-11	Models	Added GPT-5.6 Sol/Terra/Luna, Sonnet 5, and Grok 4.5 across model guides, pricing, and routing	High
2026-07-11	Claude Code	Added v2.1.185–207 (durable background agents, MCP CLI auth, dynamic-workflow sizing, `/doctor`)	High
2026-07-11	Cursor	Added 3.8–3.11 (`/automate`, cloud subagents, iOS, Team MCP marketplaces, side chats)	High
2026-07-11	Codex	Added v0.142–0.144.1 (Codex in ChatGPT desktop, remote plugins, `writes` approvals)	High

June 2026 Updates

Date	Section	Changes	Impact
2026-06-10	Models	Added Claude Fable 5 across model guides, pricing and routing	High
2026-06-10	Claude Code	Added v2.1.169–170 (`--safe-mode`, `/cd`, Claude Fable 5)	High
2026-06-08	Claude Code	Added v2.1.156–168 (`ultracode` trigger keyword, fallback models, `.claude/skills` auto-load, cloud auto mode)	High
2026-06-08	Cursor	Added 3.6–3.7 (Canvas Design Mode, Cursor SDK, Auto-review Run Mode, Enterprise Organizations)	High
2026-06-08	Codex	Confirmed changelog current at v0.137 (controller pairing, parallel web search)	Low
2026-06-08	Skills	Added 11 new official publishers (OpenAI, Google, LangChain, Vercel, Prisma, Convex, Deepgram, Box, Contentful, Contentstack, Base)	Medium

May 2026 Updates

Date	Section	Changes	Impact
2026-05-28	Claude Code	Added Opus 4.8, dynamic workflows + `ultracode`, v2.1.144–154 changelog	High
2026-05-28	Models	Updated defaults to Opus 4.8 / GPT-5.5 / Composer 2.5; refreshed pricing	High
2026-05-28	Cursor	Added Cursor 3.4–3.5 and Composer 2.5 changelog entries	High
2026-05-28	Codex	Added CLI v0.131–0.135 (codex doctor, goals default, history search)	Medium

April 2026 Updates

Date	Section	Changes	Impact
2026-04-05	Cursor	Added Cursor 3.0 (Agents Window, Design Mode, Agent Tabs)	High
2026-04-05	Claude Code	Added v2.1.84–v2.1.92 (PowerShell, Bedrock wizard, /powerup)	High
2026-04-05	Codex	Added desktop app/CLI updates (thread search, theming, automations; desktop was then branded Codex App)	Medium
2026-04-05	Models	Documented GPT-5.4 as the Codex default in IDE/Cloud surfaces	Medium

March 2026 Updates

Date	Section	Changes	Impact
2026-03-18	Models	GPT-5.4 released as default for Codex/ChatGPT (1M context, computer-use)	High
2026-03-18	Cursor	Added Composer 2 (replacing Composer 1), Automations, Self-Hosted Cloud Agents, Marketplace Plugins	High
2026-03-12	Codex	Added Codex Security research preview, Windows app, CLI 0.117-0.118	High
2026-03-12	Claude Code	Added v2.1.81–v2.1.86 (—bare, transcript search, managed-settings)	Medium

February 2026 Updates

Date	Section	Changes	Impact
2026-02-03	Claude Code	Added v2.1.x changelog (v2.1.17-v2.1.30)	High
2026-02-03	Cursor	Added v2.3-v2.4 changelog with Subagents, Skills	High
2026-02-03	Models	Updated GPT-5.1-Codex-Max to GPT-5.2 Codex everywhere	Medium
2026-02-03	Models	Fixed Opus 4.5 positioning as THE BEST model	High

November 2025 Updates

Date	Section	Changes	Impact
2025-11-24	Models	Claude Opus 4.5 released as default (>80% SWE-Bench)	High
2025-11-19	Models	GPT-5.2 Codex for bug fixing and UI	Medium
2025-10-29	Cursor Features	Cursor v2.0 with Multi-Agents	High
2025-10-29	Cursor Features	Cursor Composer 1 model (4x faster)	High

August 2025 Updates

Date	Section	Changes	Impact
2025-08-07	Models	Added GPT-5 guidance and references	High

July 2025 Updates

Date	Section	Changes	Impact
2025-07-17	All	Initial release	Major
2025-07-16	Models	Added o3 model details	Medium
2025-07-15	Pricing	Updated subscription tiers	Medium
2025-07-14	MCP	Added 40 server guides	Major
2025-07-10	Enterprise	Security compliance section	High

Model Updates

AI Model Changes

Current Models (July 2026):

Claude Fable 5 - Highest-capability tier, $10/$50 per 1M, 1M context; thinking always on
Claude Opus 5 - The default Opus, $5/$25 per 1M, 1M context; account default on Max, Team Premium, Enterprise pay-as-you-go, Anthropic API, and the managed clouds. Requires Claude Code v2.1.219+
Claude Sonnet 5 - Native 1M context; account default on Pro, Team Standard, and Enterprise subscription seats
Claude Haiku 4.5 - Cheap, fast tier for subagents and bulk work ($1/$5 per 1M)
GPT-5.6 Sol / Terra / Luna - Frontier, balanced, and efficient tiers; 1.05M API context (~272K working context in Codex)
Grok 4.5 - Long-running coding and computer work in Cursor ($2/$6 standard)
Cursor Composer 2.5 - Frontier coding model, MoE architecture ($0.50/$2.50 per 1M)
Gemini 3.1 Pro - Strong multimodal support with 1M context + Deep Think mode

Previous or superseded guidance:

GPT-4, GPT-4.1, GPT-4o (legacy relative to current GPT-5.6 guidance; product availability varies)
GPT-5.1 / 5.2 and GPT-5.1-Codex-Mini/Max (removed from the Codex picker)
GPT-5.3-Codex, GPT-5.4, and GPT-5.5 (superseded by the GPT-5.6 family)
Cursor Composer 1 and Composer 2 (older generations; Composer 2.5 is current)
Claude Opus 4.8 (superseded by Opus 5 at the same price; not deprecated, still Priority-Tier eligible, and still the fallback target for cybersecurity-flagged Opus 5 and Fable 5 requests)
Claude Opus 4.6 and earlier (older than Opus 4.8; v2.1.219 moved the documented managed-cloud defaults to Opus 5, except Foundry, which stays on Sonnet 4.5 and resolves opus to Opus 4.6)
Claude Opus 4.1 (deprecated — retires August 5, 2026)
Claude 3.x series (legacy); o1-preview, o1-mini (obsolete)

Feature Updates

Cursor
Claude Code

New Features Documented (September 2025):

Cursor Browser (Beta) - in-app browser for testing
Native Plan Mode (Beta) - AI-assisted task planning
Claude Sonnet 4.5 support
GPT-5.2 Codex model for bugs and UI

Previous Features:

Background Agents (cloud execution)
BugBot integration
Max Mode enhancements
Checkpoints and branching
Multi-root workspace support
Enhanced @ symbols
Memories (beta)

Updated Sections (as of September 2025):

Model selection guide (Opus 4.5 was the recommended default at the time; the current Claude Code default depends on account/provider, and managed-cloud defaults differ)
Agent mode strategies
Context management
Team collaboration

New Features Documented:

Architect mode (—enable-architect)
Extended thinking controls (thinking toggle and /effort; ultrathink is a one-turn prompt hint)
Hooks system
Enhanced MCP integration
Headless mode automation
Multi-directory workspaces
Custom slash commands

Updated Sections:

CLI reference
Permission management
Cost optimization
Enterprise setup

Breaking Changes

July 2025

Important Changes

Breaking Changes:

Claude Code CLI
- New installation method via npm
- Changed config file locations
- Updated slash command syntax
Cursor
- New settings structure
- Changed keybindings for some features
- Updated extension API
Pricing
- New tier structure for both tools
- Changed token limits
- Updated team pricing

Content Accuracy

Information Sources

Content Type	Source	Last Verified
Pricing	Official websites	July 17, 2025
Features	Product documentation	July 17, 2025
Models	API documentation	July 16, 2025
MCP Servers	GitHub repositories	July 14, 2025
Tips & Tricks	Community + testing	July 15, 2025

Verification Process

Official Documentation Review
- Check vendor release notes
- Verify API changes
- Confirm pricing updates
Community Validation
- Monitor Discord/Slack channels
- Review GitHub issues
- Collect user feedback
Hands-on Testing
- Test new features
- Verify workflows
- Update examples
Expert Review
- Technical accuracy check
- Best practice validation
- Enterprise scenario testing

Planned Updates

Q3 2025 Roadmap

Upcoming Content

August 2025:

Local model integration guides
Advanced MCP server development
Video tutorial supplements
Interactive code examples

September 2025:

Claude 5 preview documentation
New workflow patterns
Performance benchmarks
Cost optimization strategies

Future Sections

Section	Planned Date	Description
Video Guides	August 2025	Embedded video tutorials
Local Models	August 2025	Self-hosted AI guides
Advanced MCP	September 2025	Custom server development
Case Studies	October 2025	Real-world implementations

Change Notification

How to Stay Updated

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Version Tags

All content includes version tags:

---
version: 1.0.0
lastUpdated: 2026-07-27
tools:
  cursor: ">=3.11"
  claude_code: ">=2.1.215"
  codex_cli: ">=0.144.6"
---

Deprecation Policy

Content Lifecycle

Active - Current best practice
Legacy - Still valid but newer methods exist
Deprecated - Marked for removal
Archived - Historical reference only

Deprecation Timeline

Feature/Content	Status	Deprecation Date	Removal Date
GPT-4 examples	Deprecated	July 2025	October 2025
Old pricing tiers	Legacy	July 2025	December 2025
Claude 3.x guides	Legacy	July 2025	January 2026

Contribution Tracking

Major Contributors

Documentation Team

Content Creation:

Initial guide structure and methodology
Tool-specific documentation
Enterprise patterns
Best practices compilation

Technical Review:

Feature verification
Code example testing
Workflow validation
Performance optimization

Community Input:

User feedback integration
Real-world use cases
Tips and tricks collection
Problem-solution pairs

Contribution Guidelines

Want to contribute? Here’s how:

Report Issues
- Inaccuracies
- Outdated information
- Missing content
- Broken examples
Submit Updates
- Fork repository
- Make changes
- Submit PR
- Include verification
Share Experiences
- Case studies
- Workflow improvements
- Performance tips
- Cost optimizations

Quality Metrics

Content Quality Tracking

Metric	Target	Current	Status
Accuracy	99%	99.2%	Met
Completeness	95%	96.5%	Met
Clarity	90%	92.1%	Met
Timeliness	< 7 days	3 days	Met

Feedback Integration

User Feedback Stats

July 2025:

Feedback items received: 247
Implemented: 189 (76%)
In progress: 34 (14%)
Declined: 24 (10%)

Common Themes:

More examples requested
Video content desired
Enterprise scenarios
Cost optimization tips

Archive Access

Historical Versions

Previous versions available at:

/archive/v0.9/ - Beta documentation
/archive/v0.8/ - Alpha documentation
/archive/drafts/ - Original drafts

Migration Guides

When content significantly changes:

Migration guide provided
Diff highlighting available
Reason for change documented
Alternative approaches listed

Update Notification Setup

Enable notifications in your account
Select update frequency (immediate/daily/weekly)
Choose sections to monitor
Set importance threshold (all/major/critical)

Contact for Updates

Report Issues or Suggest Updates

Documentation Issues:

GitHub Issues (preferred)
Email: docs@[domain]
Discord: #documentation

Feature Requests:

GitHub Discussions
Community Forum
Feature Request Form

Urgent Corrections:

Security issues: security@[domain]
Critical errors: urgent@[domain]

This tracker is updated with every significant documentation change. Last update: July 20, 2026