Is Claude Fable 5 available on Claude Code?

Yes — restored July 1, 2026. Commerce lifted export controls June 30 and Anthropic began restoring Fable 5 in Claude Code globally. Update to Claude Code 2.1.170 or later, select Fable 5 in the model picker, and verify your plan supports frontier usage. Rollout may be gradual by account. See is-fable-5-back-2026 for status.

What can I use Fable 5 for in Claude Code?

Fable 5 excels at ambitious coding projects including large migrations, complex implementations, multi-day autonomous sessions, and can write its own tests to check its work. It's built for problems you weren't able to solve with other models.

What version of Claude Code do I need for Fable 5?

You need Claude Code version 2.1.170 or later to access Fable 5. Update using the install script, Homebrew, or WinGet. Check your version with 'claude --version'. If the update doesn't work, uninstall with 'npm uninstall -g @anthropic-ai/claude-code' or 'brew uninstall claude-code', then reinstall using the recommended method.

Why does 'claude --version' show an old version after updating?

You likely have multiple Claude Code installations from different package managers (npm, Bun, Homebrew). Remove all old installations with 'npm uninstall -g @anthropic-ai/claude-code', 'bun remove -g @anthropic-ai/claude-code', and '/opt/homebrew/bin/npm uninstall -g @anthropic-ai/claude-code'. Then do a clean install using 'curl -fsSL https://claude.ai/install.sh | bash'. The correct installation should be at ~/.local/bin/claude.

How much does Fable 5 cost?

Claude Fable 5 is priced at $10 per million input tokens and $50 per million output tokens, with a 90% input token discount for prompt caching. US-only inference is available at 1.1x pricing for input and output tokens.

Fable 5 on Claude Code — Live July 1, 2026 | explainx.ai Blog

Q: How do I access Fable 5 on Claude Code?

Claude Fable 5 is available via the Claude API using the model identifier 'claude-fable-5'. For organizations, it's available on the consumption-based Enterprise plan. Developers can access it through the Claude Platform natively, AWS, Google Cloud, and Microsoft Foundry.

Update — July 8, 2026: Promo extended through Sunday July 12 — extension guide

Update — July 2, 2026 (post-relaunch): First days back — developers report frequent Opus 4.8 fallbacks, rate limits reset by ClaudeDevs, and split quality vs launch week. Tips: use high effort, 10-80-10 planning, stretch the July 12 included window. Developer reaction guide →

Update — July 1, 2026: Fable 5 is live on Claude Code. Official redeploy post: global restore, new cyber classifiers — some coding/debugging routes to Opus 4.8, 50% weekly usage through July 12 then credits. Full guide → · Status hub →

Status (June 30, 2026 — Day 18): Fable 5 is not available on Claude Code for general users. June 27 Axios "within days" reporting has not produced a restore after the weekend. Anthropic's June 25 zero-traffic confirmation for Fable stands. Mythos partial restore (Annex A US critical-infra only) does not change Claude Code's consumer/developer Fable picker. Opus 4.8 remains the fallback. Live status →

Status (June 29, 2026 — Day 17): Fable 5 is not available on Claude Code for general users. Anthropic’s June 25 zero-traffic confirmation for Fable stands; no June 29 restoration post. Mythos partial restore (Annex A US critical-infra only) does not change Claude Code’s consumer/developer Fable picker. Opus 4.8 remains the fallback. Live status →

Status (June 28, 2026 — Day 16): Fable 5 is not available on Claude Code for general users. No new restoration signal from Anthropic. The day's context: Zhipu AI reports its latest model matches Claude Mythos on security bug-detection benchmarks — the same capability class cited in the export control ban. If Zhipu open-sources this model (consistent with their GLM history), internationally-accessible Mythos-parity security AI would exist outside any US export control framework. Opus 4.8 remains the Claude Code fallback. Live status →

Status (June 27, 2026 — Day 15): Fable 5 is not available on Claude Code for general users. Anthropic's official June 27 post says Mythos 5 is redeploying to US critical-infrastructure organizations first; Fable 5 general use is still being negotiated with the government. Zero Fable traffic was confirmed June 25 — that still holds. Opus 4.8 is the fallback.

June 27 official Anthropic update:

Today, the government notified us that Mythos 5, our strongest cybersecurity model, can be redeployed to a set of US organizations that operate and defend critical infrastructure. We're restoring access for these organizations quickly, and we're continuing to work with the government to expand access to Mythos 5 and make Fable 5 available for general use again.

Sam McAllister (Anthropic staff, June 25): "We are currently serving exactly 0 traffic to Fable 5." Amol Avasare (Head of Growth, June 25): broad access reports were categorically false. Fable 5 may still appear in the model picker (UI bug); selecting it shows "Claude Fable 5 is currently unavailable." Use Opus 4.8.

Live status →

Quick Answer: Fable 5 is back on Claude Code July 1, 2026. Update to 2.1.170+, select Fable in the picker. Important: new classifiers may route some coding/debugging to Opus 4.8 with notification. 50% of weekly limits through July 7, then credits. Official terms →

Learn more about loop engineering

What is Claude Fable 5?

Claude Fable 5 is Anthropic's 5th generation model built for your most ambitious, long-running work. It's designed to tackle days-long, complex, and asynchronous tasks that previous models couldn't sustain.

Key capabilities:

Agents: Work for days at a time, planning across stages and checking its own work
Coding: Handle large migrations, complex implementations, and multi-day autonomous sessions
Vision: Understand diagrams, charts, and PDFs to check outputs against goals
Self-Testing: Write its own tests to verify correctness

Running Fable 5 on Claude Code

According to Anthropic's official documentation, Fable 5 runs directly in Claude Code as an agent harness.

"Run Claude Fable 5 in an agent harness like Claude Code or Claude Managed Agents, and it can work for days at a time: planning across stages, delegating to sub-agents, and checking its own work."

What This Means for Developers

When you use Fable 5 in Claude Code, you get:

Multi-Day Sessions: Fable 5 can run autonomous coding sessions that span days, not just hours
Self-Correction: The model plans work, executes, tests itself, and iterates
Goal Command: Use /goal to define long-running objectives Fable 5 will work toward
Loop Engineering: Design self-correction loops where Fable 5 gets environmental feedback and improves

How to Access Fable 5

Version Requirement

Update to Claude Code v2.1.170 or later to access Fable 5.

Check your version:

bash

claude --version

Update to the latest version:

bash

# MacOS/Linux
curl -fsSL https://claude.ai/install.sh | bash

# Windows
irm https://claude.ai/install.ps1 | iex

# Homebrew
brew upgrade claude-code

# WinGet
winget upgrade Anthropic.ClaudeCode

If the update doesn't work, you may have multiple Claude Code installations. Clean them all up first:

bash

# Check which version is active
which claude
claude --version

# Remove all old installations:

# 1. Remove npm installation (deprecated)
npm uninstall -g @anthropic-ai/claude-code

# 2. Remove Bun installation (if installed via Bun)
bun remove -g @anthropic-ai/claude-code

# 3. Remove Homebrew npm symlinks (check /opt/homebrew/bin/)
/opt/homebrew/bin/npm uninstall -g @anthropic-ai/claude-code

# 4. Remove Homebrew cask (if installed)
brew uninstall --cask claude-code

# Verify all removed
which claude
# Should show: /Users/yourusername/.local/bin/claude (or nothing)

# Then reinstall using recommended method:
# MacOS/Linux
curl -fsSL https://claude.ai/install.sh | bash

# Windows
irm https://claude.ai/install.ps1 | iex

# Verify correct version installed
claude --version
# Should show: 2.1.170 (Claude Code)

Note: You may need to close and reopen your terminal after uninstalling to refresh the PATH.

For Organizations

Claude Fable 5 is available on the consumption-based Enterprise plan.

For Developers

Access Fable 5 through:

Claude Platform API (native)
AWS (Amazon Web Services)
Google Cloud (Vertex AI)
Microsoft Foundry

Model identifier: claude-fable-5

Pricing

Input tokens: $10 per million tokens
Output tokens: $50 per million tokens
Prompt caching: 90% discount on cached input tokens
US-only inference: 1.1x pricing multiplier

What Makes Fable 5 Special for Coding?

Fable 5 is the most capable model for ambitious coding projects:

1. Large Migrations

Refactor entire codebases, migrate frameworks, or update dependencies across hundreds of files.

2. Complex Implementations

Build features that require architectural decisions, multiple file changes, and thorough testing.

3. Self-Verification

Fable 5 writes tests to check its own work, ensuring code correctness before you review.

4. Vision Integration

Uses vision to check code outputs against design mockups or architecture diagrams.

Using Fable 5 with Claude Code Features

Goal Command

The /goal command enables Fable 5 to work autonomously toward objectives:

bash

/goal "Migrate entire codebase from JavaScript to TypeScript"

Fable 5 will:

Analyze the current codebase
Plan the migration strategy
Convert files incrementally
Run tests after each change
Fix type errors
Verify 100% TypeScript coverage

Self-Correction Loops

Learn how to design effective loops where Fable 5 gets feedback and improves:

Uses verifier sub-agents (better than self-critique)
Follows fail → investigate → verify → distill → consult progression
Achieves 6x improvements over earlier models on complex tasks

Important: Safeguards & Data Retention

Automatic Safeguards

Fable 5 includes robust safeguards for cybersecurity and biology. Queries flagged in these domains are automatically routed to Opus 4.8 (you won't be charged Fable prices for rerouted requests).

Data Retention

Using Fable 5 requires 30-day data retention for safety monitoring. Learn more about data retention policies.

Benchmarks: Fable 5 vs Other Models

Claude Fable 5 is state-of-the-art at coding, knowledge work, vision, and computer use.

According to Anthropic's benchmarks, Fable 5 outperforms other leading models on:

SWE-Bench (coding challenges)
Agent tasks (multi-step workflows)
Vision understanding (diagrams, charts, PDFs)
Long-horizon tasks (days-long projects)

Should You Use Fable 5 on Claude Code?

Use Fable 5 when:

You have a complex, multi-day coding project
You need to migrate or refactor large codebases
You want the model to work autonomously with minimal supervision
The task requires structural changes, not just simple edits

Skip Fable 5 for:

Quick one-off edits or bug fixes
Simple tasks that Claude Opus or Sonnet can handle
Budget-sensitive projects (Fable 5 is premium-priced)

Getting Started with Fable 5 on Claude Code

Update: Upgrade to Claude Code v2.1.170 or later (run claude --version to check)
- If update fails, uninstall (npm uninstall -g @anthropic-ai/claude-code or brew uninstall claude-code) and reinstall
Access: Ensure you have API access or Enterprise plan subscription
Model Selection: Use claude-fable-5 as your model identifier
Define Goals: Use /goal for long-running autonomous work
Monitor Progress: Fable 5 will update you as it works through tasks
Review Output: Check completed work rather than supervising every step

Troubleshooting: Multiple Claude Code Installations

Problem: Wrong Version After Update

If claude --version shows an old version (like 2.1.23) even after installing 2.1.170, you likely have multiple Claude Code installations in your PATH.

How to Fix

Step 1: Identify all installations

bash

which claude
# Example output: /Users/yash/.bun/bin/claude

Step 2: Remove ALL old installations

You may have Claude Code installed through:

npm (deprecated method)
Bun (package manager)
Homebrew (symlinks to npm)
Multiple npm locations (nvm, system npm, Homebrew npm)

Remove them all:

bash

# npm (check all locations)
npm uninstall -g @anthropic-ai/claude-code
/opt/homebrew/bin/npm uninstall -g @anthropic-ai/claude-code

# Bun
bun remove -g @anthropic-ai/claude-code

# Homebrew cask
brew uninstall --cask claude-code

# Verify which is still active
which claude

Step 3: Clean install

bash

# MacOS/Linux (recommended method)
curl -fsSL https://claude.ai/install.sh | bash

# This installs to: ~/.local/bin/claude

# Restart your terminal

# Verify correct version
claude --version
# Should show: 2.1.170 (Claude Code)

Expected Installation Location

After a clean install, which claude should show:

MacOS/Linux: /Users/yourusername/.local/bin/claude
Windows: C:\Users\YourName\.local\bin\claude.exe

If it shows anything else (like /opt/homebrew/bin/claude or /.bun/bin/claude), you still have an old installation taking precedence.

Bottom Line: Claude Fable 5 represents a major leap in autonomous coding capabilities. Use it for your most ambitious projects where you need multi-day autonomy, self-correction, and frontier intelligence.

Update (June 25, 2026): Anthropic staff debunked viral return rumors — zero Fable traffic on Claude Code. Model picker UI bug only; selecting Fable 5 shows unavailable. Opus 4.8 fallback. Live status →

Update — July 8, 2026: Promo extended through Sunday July 12 — extension guide

June 27 official Anthropic update:

Today, the government notified us that Mythos 5, our strongest cybersecurity model, can be redeployed to a set of US organizations that operate and defend critical infrastructure. We're restoring access for these organizations quickly, and we're continuing to work with the government to expand access to Mythos 5 and make Fable 5 available for general use again.

Live status →

Learn more about loop engineering

What is Claude Fable 5?

Key capabilities:

Agents: Work for days at a time, planning across stages and checking its own work
Coding: Handle large migrations, complex implementations, and multi-day autonomous sessions
Vision: Understand diagrams, charts, and PDFs to check outputs against goals
Self-Testing: Write its own tests to verify correctness

Running Fable 5 on Claude Code

According to Anthropic's official documentation, Fable 5 runs directly in Claude Code as an agent harness.

"Run Claude Fable 5 in an agent harness like Claude Code or Claude Managed Agents, and it can work for days at a time: planning across stages, delegating to sub-agents, and checking its own work."

What This Means for Developers

When you use Fable 5 in Claude Code, you get:

Multi-Day Sessions: Fable 5 can run autonomous coding sessions that span days, not just hours
Self-Correction: The model plans work, executes, tests itself, and iterates
Goal Command: Use /goal to define long-running objectives Fable 5 will work toward
Loop Engineering: Design self-correction loops where Fable 5 gets environmental feedback and improves

How to Access Fable 5

Version Requirement

Update to Claude Code v2.1.170 or later to access Fable 5.

Check your version:

bash

claude --version

Update to the latest version:

bash

# MacOS/Linux
curl -fsSL https://claude.ai/install.sh | bash

# Windows
irm https://claude.ai/install.ps1 | iex

# Homebrew
brew upgrade claude-code

# WinGet
winget upgrade Anthropic.ClaudeCode

If the update doesn't work, you may have multiple Claude Code installations. Clean them all up first:

bash

# Check which version is active
which claude
claude --version

# Remove all old installations:

# 1. Remove npm installation (deprecated)
npm uninstall -g @anthropic-ai/claude-code

# 2. Remove Bun installation (if installed via Bun)
bun remove -g @anthropic-ai/claude-code

# 3. Remove Homebrew npm symlinks (check /opt/homebrew/bin/)
/opt/homebrew/bin/npm uninstall -g @anthropic-ai/claude-code

# 4. Remove Homebrew cask (if installed)
brew uninstall --cask claude-code

# Verify all removed
which claude
# Should show: /Users/yourusername/.local/bin/claude (or nothing)

# Then reinstall using recommended method:
# MacOS/Linux
curl -fsSL https://claude.ai/install.sh | bash

# Windows
irm https://claude.ai/install.ps1 | iex

# Verify correct version installed
claude --version
# Should show: 2.1.170 (Claude Code)

Note: You may need to close and reopen your terminal after uninstalling to refresh the PATH.

For Organizations

Claude Fable 5 is available on the consumption-based Enterprise plan.

For Developers

Access Fable 5 through:

Claude Platform API (native)
AWS (Amazon Web Services)
Google Cloud (Vertex AI)
Microsoft Foundry

Model identifier: claude-fable-5

Pricing

Input tokens: $10 per million tokens
Output tokens: $50 per million tokens
Prompt caching: 90% discount on cached input tokens
US-only inference: 1.1x pricing multiplier

What Makes Fable 5 Special for Coding?

Fable 5 is the most capable model for ambitious coding projects:

1. Large Migrations

Refactor entire codebases, migrate frameworks, or update dependencies across hundreds of files.

2. Complex Implementations

Build features that require architectural decisions, multiple file changes, and thorough testing.

3. Self-Verification

Fable 5 writes tests to check its own work, ensuring code correctness before you review.

4. Vision Integration

Uses vision to check code outputs against design mockups or architecture diagrams.

Using Fable 5 with Claude Code Features

Goal Command

The /goal command enables Fable 5 to work autonomously toward objectives:

bash

/goal "Migrate entire codebase from JavaScript to TypeScript"

Fable 5 will:

Analyze the current codebase
Plan the migration strategy
Convert files incrementally
Run tests after each change
Fix type errors
Verify 100% TypeScript coverage

Self-Correction Loops

Learn how to design effective loops where Fable 5 gets feedback and improves:

Uses verifier sub-agents (better than self-critique)
Follows fail → investigate → verify → distill → consult progression
Achieves 6x improvements over earlier models on complex tasks

Important: Safeguards & Data Retention

Automatic Safeguards

Fable 5 includes robust safeguards for cybersecurity and biology. Queries flagged in these domains are automatically routed to Opus 4.8 (you won't be charged Fable prices for rerouted requests).

Data Retention

Using Fable 5 requires 30-day data retention for safety monitoring. Learn more about data retention policies.

Benchmarks: Fable 5 vs Other Models

Claude Fable 5 is state-of-the-art at coding, knowledge work, vision, and computer use.

According to Anthropic's benchmarks, Fable 5 outperforms other leading models on:

SWE-Bench (coding challenges)
Agent tasks (multi-step workflows)
Vision understanding (diagrams, charts, PDFs)
Long-horizon tasks (days-long projects)

Should You Use Fable 5 on Claude Code?

Use Fable 5 when:

You have a complex, multi-day coding project
You need to migrate or refactor large codebases
You want the model to work autonomously with minimal supervision
The task requires structural changes, not just simple edits

Skip Fable 5 for:

Quick one-off edits or bug fixes
Simple tasks that Claude Opus or Sonnet can handle
Budget-sensitive projects (Fable 5 is premium-priced)

Getting Started with Fable 5 on Claude Code

Update: Upgrade to Claude Code v2.1.170 or later (run claude --version to check)
- If update fails, uninstall (npm uninstall -g @anthropic-ai/claude-code or brew uninstall claude-code) and reinstall
Access: Ensure you have API access or Enterprise plan subscription
Model Selection: Use claude-fable-5 as your model identifier
Define Goals: Use /goal for long-running autonomous work
Monitor Progress: Fable 5 will update you as it works through tasks
Review Output: Check completed work rather than supervising every step

Troubleshooting: Multiple Claude Code Installations

Problem: Wrong Version After Update

If claude --version shows an old version (like 2.1.23) even after installing 2.1.170, you likely have multiple Claude Code installations in your PATH.

How to Fix

Step 1: Identify all installations

bash

which claude
# Example output: /Users/yash/.bun/bin/claude

Step 2: Remove ALL old installations

You may have Claude Code installed through:

npm (deprecated method)
Bun (package manager)
Homebrew (symlinks to npm)
Multiple npm locations (nvm, system npm, Homebrew npm)

Remove them all:

bash

# npm (check all locations)
npm uninstall -g @anthropic-ai/claude-code
/opt/homebrew/bin/npm uninstall -g @anthropic-ai/claude-code

# Bun
bun remove -g @anthropic-ai/claude-code

# Homebrew cask
brew uninstall --cask claude-code

# Verify which is still active
which claude

Step 3: Clean install

bash

# MacOS/Linux (recommended method)
curl -fsSL https://claude.ai/install.sh | bash

# This installs to: ~/.local/bin/claude

# Restart your terminal

# Verify correct version
claude --version
# Should show: 2.1.170 (Claude Code)

Expected Installation Location

After a clean install, which claude should show:

MacOS/Linux: /Users/yourusername/.local/bin/claude
Windows: C:\Users\YourName\.local\bin\claude.exe

If it shows anything else (like /opt/homebrew/bin/claude or /.bun/bin/claude), you still have an old installation taking precedence.

What is Claude Fable 5?

Running Fable 5 on Claude Code

What This Means for Developers

How to Access Fable 5

Version Requirement

For Organizations

For Developers

Pricing

What Makes Fable 5 Special for Coding?

1. Large Migrations

2. Complex Implementations

3. Self-Verification

4. Vision Integration

Using Fable 5 with Claude Code Features

Goal Command

Self-Correction Loops

Important: Safeguards & Data Retention

Automatic Safeguards

Data Retention

Benchmarks: Fable 5 vs Other Models

Should You Use Fable 5 on Claude Code?

Getting Started with Fable 5 on Claude Code

Troubleshooting: Multiple Claude Code Installations

Problem: Wrong Version After Update

How to Fix

Expected Installation Location

Related Reading

What is Claude Fable 5?

Running Fable 5 on Claude Code

What This Means for Developers

How to Access Fable 5

Version Requirement

For Organizations

For Developers

Pricing

What Makes Fable 5 Special for Coding?

1. Large Migrations

2. Complex Implementations

3. Self-Verification

4. Vision Integration

Using Fable 5 with Claude Code Features

Goal Command

Self-Correction Loops

Important: Safeguards & Data Retention

Automatic Safeguards

Data Retention

Benchmarks: Fable 5 vs Other Models

Should You Use Fable 5 on Claude Code?

Getting Started with Fable 5 on Claude Code

Troubleshooting: Multiple Claude Code Installations

Problem: Wrong Version After Update

How to Fix

Expected Installation Location

Related Reading

Related posts

Fable 5 Found a RAT on a Windows PC — What the Viral Reddit Story Actually Shows

Software for One: Building Personal Apps with AI Coding Agents

Fable 5 Advisor + Sonnet 5 Executor: Claude Code Setup, Prompts, and When to Consult

Related posts

Fable 5 Found a RAT on a Windows PC — What the Viral Reddit Story Actually Shows

Software for One: Building Personal Apps with AI Coding Agents

Fable 5 Advisor + Sonnet 5 Executor: Claude Code Setup, Prompts, and When to Consult