SWE-Bench Pro
Claude Fable 5
The general-use model: strong on long coding tasks, document-heavy analysis, visual reasoning, tool use, and work that needs many careful steps.
80.3%
Claude 5 in Ottermind
How to use Claude Fable 5 in Ottermind for real tasks
Start with a ready-made prompt, let Ottermind connect Claude Fable 5 to your files, memory, devices, and tools, and move from intent to a finished plan, deck, code change, or research summary.
Start with Claude Fable 5, then let Ottermind connect the work
Claude Fable 5 is strongest when it can work with real context instead of an empty chat box. Ottermind adds the missing operating layer: files, memory, tools, devices, and task continuity.
OSWorld-Verified
Claude Mythos 5
The trusted-access model: the same underlying family with fewer safeguards in selected areas, especially for advanced cyberdefense and computer-use work.
85.4%
Which model should Ottermind users think about?
Claude Fable 5 vs Mythos 5
For most teams, Claude Fable 5 is the usable main model: general access, stronger safeguards, and enough capability for complex work. Claude Mythos 5 is best understood as trusted access for specialized cyberdefense and biology programs. Ottermind makes Fable 5 steadier by giving it Mind, files, tools, and task context.
General use
Claude Fable 5
Fable 5 is the general-use model with safeguards, designed for broad access across coding, documents, vision, knowledge work, and agentic tool use.
- Best default for most Ottermind users
- Broadly available according to Anthropic
- Mind + tools help it stay grounded in your work
Trusted access
Claude Mythos 5
Mythos 5 is the trusted-access version for selected programs where Anthropic can relax some safeguards for advanced research and infrastructure needs.
- Cyberdefense partners and infrastructure providers
- Biology trusted access programs
- A ceiling signal, not the default user path
A benchmark picture built for real tasks
Selected results from Anthropic's Claude Fable 5 and Mythos 5 launch materials show where the models are strongest: coding, knowledge work, spatial reasoning, computer use, and tool use.
| Capability | Claude Fable 5 | Mythos Preview | Claude Opus 4.8 | GPT 5.5 | Gemini 3.1 Pro |
|---|---|---|---|---|---|
| Agentic codingSWE-Bench Pro | 80.3% | 77.8% | 69.2% | 58.6% | 54.2% |
| Agentic codingFrontierCode Diamond | 29.3% | - | 13.4% | 5.7% | - |
| Knowledge workGDPval-AA | 1932 | - | 1890 | 1769 | 1314 |
| Knowledge work visionGDP.pdf | 29.8% | - | 22.5% | 24.9% | 16.7% |
| Spatial reasoningBlueprint-Bench 2 | 38.6% | - | 14.5% | 36.2% | 26.5% |
| Tool useAutomationBench | 17.4% | - | 15.5% | 12.9% | 9.6% |
| Computer useOSWorld-Verified | 85.0% | 85.4% | 83.4% | 78.7% | 76.2% |
| LegalLegal Agent Benchmark | 13.3% | - | 10.4% | 2.1% | 0.0% |
| Multidisciplinary reasoningHumanity's Last Exam | 64.5% | 64.7% | 57.9% | 52.2% | 51.4% |
| Agentic codingTerminal-Bench 2.1 | 88.0% | - | 82.7% | 83.4% | 70.7% |
| CybersecurityExploitBench | 78.0% | 69.0% | 40.0% | 34.0% | - |
| HealthHealthBench Professional | 66.0% | 64.7% | 56.9% | 51.8% | - |
Source: Anthropic launch article, June 9, 2026. Some scores are marked in Anthropic's table as approximate or subject to safeguard fallbacks; this page summarizes the user-facing comparison rather than replacing the original methodology.
Ottermind turns Claude from a chat box into an always-available assistant
Ottermind is not an AI tool you occasionally open to ask questions. It is a personal assistant that stays close to your work and life: connected to your devices, files, memory, and tools, and ready to help turn complex tasks into deliverables.
Everywhere
Start from the web, continue on desktop or mobile, and keep the same task context instead of starting over.
Mind
Your portable context layer: files, preferences, habits, knowledge, and long-term memory that Claude can use when you need it.
Tools
Claude becomes more useful when Ottermind can connect it to documents, decks, code, research, automations, and workflows.
Done
Ask for a plan, a PPT, a code change, a product draft, or a system design, and Ottermind helps move from intent to output.
What Claude can do better with Ottermind around it
Read source files and summarize the real project context
Write a proposal, polish the narrative, and prepare follow-up tasks
Turn research notes into a structured PowerPoint draft
Plan, code, test, and explain a product change
Remember your preferences so every agent starts with context
Connect work across web, desktop, and mobile without losing the thread
Capability demos that feel closer to real work
Anthropic highlights more than raw benchmark rows: long code migration, visual app reconstruction, persistent memory, and multimodal creative work. Ottermind turns those examples into tasks with your files, preferences, and tools already attached.
Long code migration01
Stripe 50-million-line Ruby migration
Use Fable 5 to reason across large codebases, then let Ottermind attach repo context, plan the migration, prepare checklists, make changes, and keep validation visible.
Vision reasoning02
Screenshot to web app and Pokémon FireRed
Claude can work from visual inputs such as screenshots and game frames. Ottermind can turn that vision reasoning into specs, UI rebuilds, notes, decks, or product tasks.
Long context and memory03
Persistent file-based memory
Anthropic calls out persistent file-based memory as a major lift for task performance. Ottermind Mind makes that idea portable across Claude, Codex, and future agents.
Multimodal creation04
Solar system, Factorio, VibeCAD, and music
From simulations to CAD-like creation and music-synced visuals, Fable 5 is more useful when Ottermind can capture the goal, assets, iterations, and final deliverable.
Questions, answered
Is Claude 5 the same as Claude Fable 5?+
Claude 5 is a search-friendly way people may describe the new generation. Anthropic's launch names the models Claude Fable 5 and Claude Mythos 5, and this page explains both.
What is Claude Fable 5 best at?+
Based on Anthropic's launch materials, Fable 5 is strongest on long, complex tasks: software engineering, knowledge work, vision, memory-heavy workflows, scientific research, and tool-based agent work.
What is Claude Mythos 5?+
Anthropic describes Mythos 5 as the same underlying model family with safeguards lifted in selected areas for a small group of trusted cyberdefenders, biology programs, and infrastructure providers.
What is the difference between Claude Fable 5 and Mythos 5?+
The practical Claude Fable 5 vs Mythos 5 distinction is access and safeguards: Fable 5 is the general-use model most people should expect to use, while Mythos 5 is reserved for trusted-access programs.
Is Claude Fable 5 available?+
Anthropic describes Claude Fable 5 as broadly available across Claude surfaces. Availability can vary by plan, region, API access, and product rollout, so Ottermind treats Fable 5 as the default user-facing model path.
What is Claude Fable 5 pricing?+
Claude Fable 5 pricing is set by Anthropic and may differ between the Claude app, API, and partner products. For Ottermind users, the important point is that model access is paired with Mind, files, tools, and device context.
What safeguards does Claude Fable 5 have?+
Claude Fable 5 keeps stronger safeguards for general use, especially around areas like cyber and biology. Ottermind adds product-level grounding by keeping Claude attached to user intent, permissions, files, and workflow context.
Can developers use the claude-fable-5 API?+
Anthropic says developers can use claude-fable-5 through the Claude API when their account has access. Ottermind can make that API more useful by pairing the model with persistent context, memory, and tool execution.
Why use Claude through Ottermind instead of a normal chat page?+
A chat page waits for you to supply context. Ottermind brings Claude closer to your real environment: your files, reusable memory, tools, devices, and ongoing tasks.
What is Ottermind Mind?+
Mind is your portable, pluggable intelligent brain. It can carry your files, preferences, habits, knowledge, and long-term memory into Claude, Codex, and future agents so they understand you faster.
Let Claude work with your real context
Give Ottermind the goal. It can bring in your memory, files, tools, and devices so Claude has what it needs to help get the work done.