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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

GPT-5.6-Cyber is a cybersecurity-focused OpenAI model introduced for trusted defenders through Daybreak Red access. Built on GPT-5.6 Sol, the model is trained to improve performance on advanced security research, vulnerability discovery, exploit validation, and specialized defensive workflows. GPT-5.6-Cyber is intended for authorized users who need deeper support across vulnerability research, security testing, exploit-chain analysis, incident response, malware analysis, secure code review, patch validation, and technical documentation. OpenAI created Daybreak to give approved individuals and organizations access to frontier cyber capabilities while managing the risks of reduced safeguards. Daybreak Blue provides access to frontier general-purpose models with safeguards tailored for defensive security work, while Daybreak Red provides access to cybersecurity-specific models such as GPT-5.6-Cyber. The model is designed to reduce unnecessary refusals that can interrupt legitimate security research while still operating inside a trusted access program. OpenAI reports that GPT-5.6-Cyber improves performance on certain specialized cybersecurity evaluations and has been used to support real-world vulnerability research and coordinated disclosure. Access controls include identity verification, account security, monitoring, legal attestations, approved-use restrictions, and additional requirements such as hardware security keys for individual Daybreak accounts. By combining cyber-specific training, trusted access controls, reduced refusal behavior, vulnerability research capabilities, and safety practices, GPT-5.6-Cyber helps approved defenders conduct advanced security work more effectively.

API Access

Has API Yes 

API Access

Has API Yes 

Screenshots View All

No images available

Screenshots View All

Integrations

Amazon Bedrock Yes 
Biela.dev Yes 
CSS Yes 
Claude Yes 
DataGrip Yes 
Dessix Yes 
Devin Yes 
Go Yes 
HTML Yes 
Hermes Agent Yes 
JetBrains Junie Yes 
MyClaw Yes 
OpenClaw Yes 
OpenClaw.Direct Yes 
Qwen Code Yes 
RubyMine Yes 
RustRover Yes 
Springhub Yes 
TypeScript Yes 
YAML Yes 

Integrations

Amazon Bedrock No 
Biela.dev No 
CSS No 
Claude No 
DataGrip No 
Dessix No 
Devin No 
Go No 
HTML No 
Hermes Agent No 
JetBrains Junie No 
MyClaw No 
OpenClaw No 
OpenClaw.Direct No 
Qwen Code No 
RubyMine No 
RustRover No 
Springhub No 
TypeScript No 
YAML No 

Pricing Details

No price information available.
Free Trial No 
Free Version No 

Pricing Details

No price information available.
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 No 
iPad App No 
Android App No 
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

OpenAI

Founded

2015

Country

United States

Website

openai.com

Product Features

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