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Description

Claude Fable 5.5 is an anticipated but currently unannounced model in Anthropic's Claude family, and Anthropic has not confirmed that a model with this name will be released. As of September 30, 2026, Claude Fable 5.1 remains the latest officially documented Fable model. Fable represents Anthropic's highest-end model tier for demanding reasoning and long-horizon agentic work, while the newer Opus 5.5 and Sonnet 5.5 occupy lower-cost positions in the Claude lineup. Anthropic's current documentation gives Fable 5.1 a 1-million-token context window and maximum output length of 128,000 tokens. It supports text and image inputs with text output and uses adaptive thinking that remains active throughout model operation. Fable 5.1 defaults to high reasoning effort and is listed as having a June 2026 reliable knowledge cutoff and training-data cutoff. API pricing is $10 per million input tokens and $50 per million output tokens, while prompt-cache reads cost $0.25 per million tokens and Batch API processing receives a 50% input and output discount. Anthropic's official documentation currently provides model identifiers for Fable 5.1 across the Claude API, Amazon Bedrock, Google Cloud, Microsoft Foundry, and Claude Platform on AWS. No equivalent model identifier, specifications, benchmark results, pricing, availability information, or release schedule has been published for Claude Fable 5.5.

Description

Claude Sonnet 4 is an advanced AI model that enhances coding, reasoning, and problem-solving capabilities, perfect for developers and businesses in need of reliable AI support. This new version of Claude Sonnet significantly improves its predecessor’s capabilities by excelling in coding tasks and delivering precise, clear reasoning. With a 72.7% score on SWE-bench, it offers exceptional performance in software development, app creation, and problem-solving. Claude Sonnet 4’s improved handling of complex instructions and reduced errors in codebase navigation make it the go-to choice for enhancing productivity in technical workflows and software projects.

API Access

Has API Yes 

API Access

Has API Yes 

Screenshots View All

No images available

Screenshots View All

Integrations

Augment Code Yes 
BLACKBOX AI Yes 
Brokk Yes 
Claude Max Yes 
Claude Pro Yes 
DataGrip Yes 
Elixir Yes 
Emergent Yes 
GitHub Copilot CLI Yes 
GoLand Yes 
HTML Yes 
Node.js Yes 
Python Yes 
ReSharper Yes 
React Yes 
Rust Yes 
Scala Yes 
Skymel Yes 
StackAI Yes 
TypeScript Yes 

Integrations

Augment Code Yes 
BLACKBOX AI Yes 
Brokk Yes 
Claude Max Yes 
Claude Pro Yes 
DataGrip Yes 
Elixir Yes 
Emergent Yes 
GitHub Copilot CLI Yes 
GoLand Yes 
HTML Yes 
Node.js Yes 
Python Yes 
ReSharper Yes 
React Yes 
Rust Yes 
Scala Yes 
Skymel Yes 
StackAI Yes 
TypeScript Yes 

Pricing Details

No price information available.
Free Trial No 
Free Version No 

Pricing Details

$3 / 1 million tokens (input)
Input: $3 per 1 million tokens
Output: $15 per 1 million tokens
Free Trial No 
Free Version No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App Yes 
iPad App No 
Android App Yes 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Vendor Details

Company Name

Anthropic

Founded

2021

Country

United States

Website

claude.ai

Vendor Details

Company Name

Anthropic

Founded

2021

Country

United States

Website

claude.ai

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