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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

Grok 3 Think, the newest version of xAI's AI model, aims to significantly improve reasoning skills through sophisticated reinforcement learning techniques. It possesses the ability to analyze intricate issues for durations ranging from mere seconds to several minutes, enhancing its responses by revisiting previous steps, considering different options, and fine-tuning its strategies. This model has been developed on an unparalleled scale, showcasing outstanding proficiency in various tasks, including mathematics, programming, and general knowledge, and achieving notable success in competitions such as the American Invitational Mathematics Examination. Additionally, Grok 3 Think not only yields precise answers but also promotes transparency by enabling users to delve into the rationale behind its conclusions, thereby establishing a new benchmark for artificial intelligence in problem-solving. Its unique approach to transparency and reasoning offers users greater trust and understanding of AI decision-making processes.

API Access

Has API Yes 

API Access

Has API Yes 

Screenshots View All

No images available

Screenshots View All

Integrations

.NET Yes 
Bash Yes 
Biela.dev Yes 
DataGrip Yes 
Flowise Yes 
GoLand Yes 
Grok 3 No 
Grok 3 DeepSearch No 
HTML Yes 
LaunchLemonade Yes 
Muse Yes 
OpenCode Yes 
Oxen.ai Yes 
PHP Yes 
Perplexity Computer Yes 
Perplexity Pro Yes 
RustRover Yes 
Sup AI Yes 
Twigg Yes 
YAML Yes 

Integrations

.NET No 
Bash No 
Biela.dev No 
DataGrip No 
Flowise No 
GoLand No 
Grok 3 Yes 
Grok 3 DeepSearch Yes 
HTML No 
LaunchLemonade No 
Muse No 
OpenCode No 
Oxen.ai No 
PHP No 
Perplexity Computer No 
Perplexity Pro No 
RustRover No 
Sup AI No 
Twigg No 
YAML No 

Pricing Details

No price information available.
Free Trial No 
Free Version No 

Pricing Details

Free
Free Trial No 
Free Version Yes 

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 Yes 
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 No 

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

SpaceXAI

Founded

2023

Country

United States

Website

grok.com

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