Claude Fable 5.2 Reviews

Claude Fable 5.2

5.0 out of 5 stars
Laguna S 2.1 Reviews

Laguna S 2.1

5.0 out of 5 stars

Average Ratings 1 Rating

Total 5 out of 5 stars
ease 5 out of 5 stars
features 5 out of 5 stars

Average Ratings 1 Rating

Total 5 out of 5 stars
ease 5 out of 5 stars
features 4 out of 5 stars
design 5 out of 5 stars

Description

Claude Fable 5.2 is a frontier artificial intelligence model developed by Anthropic for advanced reasoning, autonomous software development, scientific discovery, and complex professional workflows. The model improves on Claude Fable 5.1 with stronger performance in programming, visual analysis, mathematical problem-solving, and agent-driven task execution. Its software engineering capabilities support large-scale codebase analysis, feature implementation, debugging, performance optimization, automated testing, and complex software migrations. Claude Fable 5.2 can coordinate multiple AI agents to complete long-running engineering projects and delegate simpler operations to smaller language models. The model also supports scientific research, hardware design, robotics-related reasoning, data analysis, and technical investigations that require iterative experimentation and evaluation. Configurable reasoning effort allows developers to balance computational cost, response time, and problem-solving depth according to task requirements. Anthropic reports a 49.1% score on FrontierCode 2.0, 69.9% on FrontierSWE v2, and 74.2% on Humanity's Last Exam with tools. Claude Fable 5.2 generates output up to 30% faster than its predecessor and offers an optional fast mode with up to 2.5 times faster generation, alongside safeguards for high-risk cybersecurity and biological research. The model is available through Claude applications, Claude Code, Anthropic's API, Amazon Web Services, Google Cloud, and Microsoft Azure, with standard API pricing of $8 per million input tokens and $40 per million output tokens.

Description

Laguna S 2.1 is an advanced open weight coding model that emphasizes long-term project completion and efficient reasoning capabilities. Featuring a 118-billion-parameter Mixture-of-Experts architecture, it activates 8 billion parameters for each token and accommodates a context window of up to one million tokens in both thinking and non-thinking modes. The model’s streamlined active size allows it to perform intricate tasks on local machines while still competing favorably against significantly larger models across various benchmarks, including terminal usage, software engineering, codebase question answering, and tool utilization. Designed for resilience, Laguna S 2.1 excels in tackling challenging assignments with enhanced persistence, meticulous verification, and a readiness to backtrack rather than prematurely claim success. In practical applications, it has successfully created and validated a browser rendering engine from scratch, optimized an agent harness for improved execution speed and reduced memory usage, and conducted extensive mathematical research using the available tools within its environment, demonstrating its versatility and effectiveness. This combination of features positions Laguna S 2.1 as a powerful tool for developers seeking innovative solutions.

API Access

Has API Yes 

API Access

Has API No 

Screenshots View All

Screenshots View All

Integrations

Claude Code Yes 
Hermes Agent Yes 
IntelliJ IDEA Yes 
OpenClaw Yes 
OpenCode Yes 
Visual Studio Code Yes 
BLACKBOX AI Yes 
Biela.dev Yes 
C Yes 
Cherry Studio Yes 
Claude Design Yes 
Cline No 
GitHub Copilot Yes 
Hugging Face No 
Model Context Protocol (MCP) Yes 
OfoxAI Yes 
PhpStorm Yes 
ReSharper Yes 
Ruby Yes 
Vercel AI Gateway Yes 

Integrations

Claude Code Yes 
Hermes Agent Yes 
IntelliJ IDEA Yes 
OpenClaw Yes 
OpenCode Yes 
Visual Studio Code Yes 
BLACKBOX AI No 
Biela.dev No 
C No 
Cherry Studio No 
Claude Design No 
Cline Yes 
GitHub Copilot No 
Hugging Face Yes 
Model Context Protocol (MCP) No 
OfoxAI No 
PhpStorm No 
ReSharper No 
Ruby No 
Vercel AI Gateway No 

Pricing Details

$8 per 1M tokens (input)
$8 per million input tokens and $40 per million output tokens
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 Yes 
Live Training (Online) No 
In Person No 

Vendor Details

Company Name

Anthropic

Founded

2021

Country

United States

Website

claude.ai

Vendor Details

Company Name

Poolside

Founded

2023

Country

United States

Website

poolside.ai/blog/introducing-laguna-s-2-1

Alternatives

GPT-6.1 Terra Reviews

GPT-6.1 Terra

OpenAI
5.0 out of 5 stars

Alternatives

Gemini 4 Argon Reviews

Gemini 4 Argon

Google
5.0 out of 5 stars
Claude Fable 5.1 Reviews

Claude Fable 5.1

Anthropic
5.0 out of 5 stars
Laguna XS 2.1 Reviews

Laguna XS 2.1

Poolside
GPT-6.1 Sol Reviews

GPT-6.1 Sol

OpenAI
5.0 out of 5 stars
Claude Sonnet 5.5 Reviews

Claude Sonnet 5.5

Anthropic
5.0 out of 5 stars
Claude Fable 5 Reviews

Claude Fable 5

Anthropic
5.0 out of 5 stars