Claude Fable 5.5Anthropic
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HeadroomGarm Tech
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Related Products
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About
Claude Fable 5.5 is not currently an announced or released Anthropic model. 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.
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About
Headroom is a menu bar app for macOS, Windows and Linux that cuts Claude Code and ChatGPT Codex token costs by ~50%, which can translate to up to 2x as much usage on the plan you already pay for.
It compresses the bulky tool output, logs and boilerplate your coding agent sends. Compression runs locally, before the request leaves your machine, so prompts and code stay private. Source code passes through untouched, and the originals stay available to the agent through a retrieval tool.
Typical coding sessions save 25-50% overall. Across 183 Claude Code users over one week, Headroom cut input tokens by 34% (measured) and output tokens by 33% (estimated).
Also included: a dashboard and activity feed with tokens and API-equivalent dollars saved, project learnings that turn past sessions into token-saving rules, and one-click add-ons (MarkItDown, Serena, Codebase Memory, Context7, Ponytail, Caveman).
7-day free trial, no credit card. Plans from $3/month.
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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
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Platforms Supported
Windows
Supported
Mac
Supported
Linux
Supported
Cloud
Not Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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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
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Audience
Developers and engineering teams using Claude Code, ChatGPT Codex, or compatible local coding-agent workflows.
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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API
Offers API
Supported
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API
Offers API
Not Supported
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Screenshots and VideosNo images available
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Screenshots and Videos |
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Pricing
No information available.
Free Version
Not Supported
Free Trial
Not Supported
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Pricing
$3/month
Pro is $3/month, billed annually ($36/year), or $4/month, billed monthly, for Claude Pro or ChatGPT Plus. Max x5 is $15/month, billed annually, or $20/month, billed monthly; Max x20 is $30/month, billed annually, or $40/month, billed monthly. Each plan includes a 7-day free trial with no credit card required. Team and Enterprise plans have custom pricing. A separate free, self-managed Headroom CLI is also available.
Free Version
Not Supported
Free Trial
Supported
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Reviews/
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Reviews/
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Company InformationAnthropic
Founded: 2021
United States
claude.ai
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Company InformationGarm Tech
Founded: 2026
Netherlands
extraheadroom.com
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Categories |
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Integrations
Claude Code
Supported
Model Context Protocol (MCP)
Supported
OpenCode
Supported
Visual Studio Code
Supported
Aider
Supported
Claude
Supported
Clawd.run
Supported
Cosmos
Supported
Gemini Enterprise Agent Platform
Supported
GitAuto
Supported
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Integrations
Claude Code
Supported
Model Context Protocol (MCP)
Supported
OpenCode
Supported
Visual Studio Code
Supported
Aider
Not Supported
Claude
Not Supported
Clawd.run
Not Supported
Cosmos
Not Supported
Gemini Enterprise Agent Platform
Not Supported
GitAuto
Not Supported
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