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%
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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.
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.
SWE-Bench Pro
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%
OSWorld-Verified
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?
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
Fable 5 is the general-use model with safeguards, designed for broad access across coding, documents, vision, knowledge work, and agentic tool use.
Trusted access
Mythos 5 is the trusted-access version for selected programs where Anthropic can relax some safeguards for advanced research and infrastructure needs.
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 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.
Start from the web, continue on desktop or mobile, and keep the same task context instead of starting over.
Your portable context layer: files, preferences, habits, knowledge, and long-term memory that Claude can use when you need it.
Claude becomes more useful when Ottermind can connect it to documents, decks, code, research, automations, and workflows.
Ask for a plan, a PPT, a code change, a product draft, or a system design, and Ottermind helps move from intent to output.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.