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Description

Claude Fable 5.1 is a frontier AI model from Anthropic built for demanding coding, research, knowledge work, and autonomous multi-step workflows. It delivers higher performance than Claude Fable 5 across benchmarks covering scientific research, terminal-based coding, business automation, computer use, multidisciplinary reasoning, and agentic software development. The model is particularly suited to long-running tasks where it must investigate problems, use tools, maintain context, verify intermediate work, and continue operating with limited supervision. Early evaluations highlighted improvements in areas such as root-cause analysis, code review, browser automation, financial research, document drafting, slide creation, and complex engineering workflows. Fable 5.1 also introduces lower cache-read pricing, which Anthropic says can reduce costs by roughly 25% for typical workloads and considerably more for context-heavy agentic tasks. Enterprise customers can use new privacy-oriented safeguard options that are designed to support zero-data-retention-style deployments while still maintaining misuse protections. Cybersecurity safeguards have also been refined to intervene less often on legitimate defensive work while continuing to restrict higher-risk activities such as exploit generation. Anthropic offers the model through Claude Code, Claude Cowork, Claude.ai, the Claude API, and supported cloud platforms. Claude Fable 5.1 is intended for developers, researchers, enterprises, and professional teams that need strong reasoning and coding performance without relying on Anthropic’s most restricted-access model tier.

Description

ChatGPT's latest iteration, GPT-5.5 Instant, serves as the updated default model, engineered to enhance intelligence and precision, offering responses that are clearer and more concise, effectively catering to individual user needs. Designed for daily interactions for millions, this upgrade enriches routine conversations by delivering stronger, more focused answers across various topics while maintaining a natural conversational flow and effectively utilizing shared context for personalized experiences. With notable advancements in reliability, GPT-5.5 Instant demonstrates marked improvements in factual accuracy, particularly in critical fields such as medicine, law, and finance, where precision is paramount. Additionally, it exhibits heightened proficiency in handling everyday tasks, notably in processing photo and image uploads, addressing STEM inquiries, and discerning when to employ web searches for optimal responses. The answers generated are succinct and direct, yet retain the essence and engaging character that make ChatGPT a pleasure to use, thus enhancing user satisfaction and interaction quality. This model, therefore, not only aims to meet users’ expectations but also strives to exceed them in every conversation.

API Access

Has API Yes 

API Access

Has API Yes 

Screenshots View All

Screenshots View All

Integrations

Brokk Yes 
ChatGPT Plus No 
Cheaper Inference Yes 
Cherry Studio Yes 
Cody Yes 
Dart Yes 
Doraverse Yes 
Factory Droid Yes 
GoLand Yes 
Higgsfield Supercomputer Yes 
Kubernetes Yes 
Model Context Protocol (MCP) Yes 
OpenTag Yes 
R Yes 
Replit Yes 
Revise Yes 
Ruby Yes 
RubyMine Yes 
Visual Basic Yes 
Zo Computer Yes 

Integrations

Brokk No 
ChatGPT Plus Yes 
Cheaper Inference No 
Cherry Studio No 
Cody No 
Dart No 
Doraverse No 
Factory Droid No 
GoLand No 
Higgsfield Supercomputer No 
Kubernetes No 
Model Context Protocol (MCP) No 
OpenTag No 
R No 
Replit No 
Revise No 
Ruby No 
RubyMine No 
Visual Basic No 
Zo Computer No 

Pricing Details

$10 per 1M tokens (input)
$10 per million input tokens and $50 per million output tokens
Free Trial No 
Free Version No 

Pricing Details

No price information available.
Free Trial Yes 
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 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) Yes 
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/index/gpt-5-5-instant/

Alternatives

Alternatives