Devstral

Devstral

Mistral AI
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About

Claude Fable 5.5 is not currently an announced or released Anthropic model as of September 30, 2026. Anthropic's current model documentation lists Claude Fable 5.1 as the latest Fable model alongside Claude Opus 5.5 and Claude Sonnet 5.5. Fable 5.1 remains Anthropic's premium model for demanding reasoning and long-horizon agentic workloads, with a 1-million-token context window and maximum output of 128,000 tokens. It uses adaptive thinking that is always enabled and defaults to a high reasoning effort level. Fable 5.1 is priced at $10 per million input tokens and $50 per million output tokens, with cache reads priced at $0.25 per million tokens. Anthropic has released Opus 5.5 and Sonnet 5.5, but there is currently no official model documentation, pricing, release date, benchmark data, or API identifier for Claude Fable 5.5.

About

Devstral is an open source, agentic large language model (LLM) developed by Mistral AI in collaboration with All Hands AI, specifically designed for software engineering tasks. It excels at navigating complex codebases, editing multiple files, and resolving real-world issues, outperforming all open source models on the SWE-Bench Verified benchmark with a score of 46.8%. Devstral is fine-tuned from Mistral-Small-3.1 and features a long context window of up to 128,000 tokens. It is optimized for local deployment on high-end hardware, such as a Mac with 32GB RAM or an Nvidia RTX 4090 GPU, and is compatible with inference frameworks like vLLM, Transformers, and Ollama. Released under the Apache 2.0 license, Devstral is available for free and can be accessed via Hugging Face, Ollama, Kaggle, Unsloth, and LM Studio.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Supported
iPad Supported
Android Supported
Chromebook Not Supported

Audience

Developers, AI researchers, enterprises, software engineering teams, and advanced professional users handling demanding reasoning and long-horizon agentic workloads, although Anthropic has not yet announced the model or specified its intended audience

Audience

Software developers and engineering teams seeking a tool to assist with code exploration, debugging, and multi-file editing tasks

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Supported

Screenshots and Videos

No images available

Screenshots and Videos

Pricing

No information available.
Free Version Not Supported
Free Trial Not Supported

Pricing

$0.1 per million input tokens
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Supported

Company Information

Anthropic
Founded: 2021
United States
claude.ai

Company Information

Mistral AI
Founded: 2023
France
mistral.ai/news/devstral

Alternatives

Alternatives

DeepCoder

DeepCoder

Agentica Project
Claude Fable 5

Claude Fable 5

Anthropic
DeepSWE

DeepSWE

Agentica Project
Mistral Vibe

Mistral Vibe

Mistral AI
Claude Opus 5

Claude Opus 5

Anthropic
Devstral Small 2

Devstral Small 2

Mistral AI
Devstral 2

Devstral 2

Mistral AI

Categories

AI Coding Models Supported
AI Models Supported
AI Vision Models Supported
Foundation Models Supported
Multimodal Models Supported

Categories

AI Coding Models Supported
AI Models Supported

Integrations

Augment Code Supported
BLACKBOX AI Supported
Biela.dev Supported
Bolt.new Supported
C# Supported
Cursor Supported
Databricks Supported
Flowise Supported
Gemini Enterprise Agent Platform Supported
GitHub Copilot Supported
Hugging Face Not Supported
Java Supported
LaunchLemonade Supported
Microsoft Foundry Supported
MyClaw Supported
Oxen.ai Supported
Perplexity Pro Supported
RubyMine Supported
Shipper.now Supported
YAML Supported

Integrations

Augment Code Not Supported
BLACKBOX AI Not Supported
Biela.dev Not Supported
Bolt.new Not Supported
C# Not Supported
Cursor Not Supported
Databricks Not Supported
Flowise Not Supported
Gemini Enterprise Agent Platform Not Supported
GitHub Copilot Not Supported
Hugging Face Supported
Java Not Supported
LaunchLemonade Not Supported
Microsoft Foundry Not Supported
MyClaw Not Supported
Oxen.ai Not Supported
Perplexity Pro Not Supported
RubyMine Not Supported
Shipper.now Not Supported
YAML Not Supported
Claim Claude Fable 5.5 and update features and information
Claim Claude Fable 5.5 and update features and information
Claim Devstral and update features and information
Claim Devstral and update features and information