Model introduction
Claude model by Anthropic for general chat, writing, coding assistance, and tool-assisted workflows.
Model capabilities
Specifications come from the cited model material. Catalog tags help identify access features; use the source documentation for exact limits.
Verified specifications
- Catalog status
- Currently available on MoleAPI
- Compatible protocols
- anthropic, openai
- Available billing groups
- Standard, Discount, Relay
Sources: MoleAPI console pricing catalog
Model pricing and access
Prices are read directly from the MoleAPI console catalog and shown by current billing group and context tier.
Your final charge follows the account group shown in the console.
Live pricing source
Pricing table
USD / 1M tokensStandardx1defaultInput $10 · Output $50
Input
$10 / 1M tokens
Output
$50 / 1M tokens
Cache read
$1 / 1M tokens
Cache write
$12.5 / 1M tokens
Discountx0.8discountInput $8 · Output $40
Input
$8 / 1M tokens
Output
$40 / 1M tokens
Cache read
$0.8 / 1M tokens
Cache write
$10 / 1M tokens
Relayx0.3relayInput $3 · Output $15
Input
$3 / 1M tokens
Output
$15 / 1M tokens
Cache read
$0.3 / 1M tokens
Cache write
$3.75 / 1M tokens
Access protocols
Available billing groups: Standard, Discount, Relay
- anthropic
- POST
- /v1/messages
- openai
- POST
- /v1/chat/completions
Complete model guide
Prepared from vendor sources and independently reviewed. · 2026-07-28
Claude Fable 5 model guide
Claude Fable 5 is Anthropic’s most capable generally available model, positioned for difficult, long-running coding and knowledge-work tasks. Anthropic highlights autonomous agents, large software migrations, multi-stage research and analysis, and visual document reasoning as core workloads. [6]
Positioning and core capabilities
Claude Fable 5 is a Mythos-class model intended for ambitious professional work that can span multiple stages and extended execution periods. Anthropic describes it as able to plan work across stages, delegate to sub-agents, validate its own output, and operate in asynchronous agent workflows. [3][6]
Its stated capabilities cover software engineering, complex implementations, enterprise research and analysis, and reasoning over visual and document-based inputs. [6]
Capabilities and specifications
Claude Fable 5 was announced on June 9, 2026, and Anthropic restored access on July 1, 2026, following a temporary suspension announced on June 12, 2026. [3][6]
| Specification | Detail |
|---|---|
| Model class | Mythos-class model. [3] |
| General availability | Anthropic describes Fable 5 as generally available. [3][6] |
| Supported work | Long-running coding, autonomous agents, knowledge work, research, and visual-document analysis. [6] |
| Visual reasoning inputs | Diagrams, charts, tables, files, PDFs, and design materials. [6] |
| Deployment channels | Claude applications, the Claude Platform, marketplaces, AWS, Google Cloud, and Microsoft Foundry. [6] |
Use cases
Claude Fable 5 is positioned for projects that require sustained reasoning, iterative implementation, and validation across complex tasks. [6]
- Large software migrations: Anthropic highlights large migrations and complex implementations as coding workloads for Fable 5. [6]
- Autonomous coding agents: The model is designed for agent harnesses that plan, delegate work, and check results across extended workflows. [6]
- Multi-stage enterprise analysis: Anthropic positions Fable 5 for research, analysis, and professional knowledge work involving multiple dependent stages. [6]
- Document and visual analysis: The model can analyze diagrams, charts, tables, files, PDFs, and design-validation materials. [6]
- Scientific and technical research: Anthropic includes scientific research among the model’s intended knowledge-work applications. [6]
Material limitations
Claude Fable 5 applies enhanced safeguards to cybersecurity and biology requests, and flagged requests can be routed automatically to less capable Opus models. [6]
In most Claude applications, Anthropic states that cybersecurity requests may route to Opus 4.8 and biology requests may route to Opus 5. [6] Harmless requests can also be captured by these safeguards. [6]
Use of Claude Fable 5 requires 30-day data retention for safety monitoring. [6]
Sources
Code examples
These examples use MoleAPI's OpenAI-compatible endpoint and run after you replace the API key.
curl https://api.moleapi.com/v1/chat/completions \
-H "Authorization: Bearer $MOLEAPI_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "claude-fable-5",
"messages": [{"role": "user", "content": "Hello"}]
}'Frequently asked questions
How is claude-fable-5 priced?
This page reads prices from the MoleAPI console API and updates with model prices, context tiers, and account groups.
How can I access claude-fable-5?
Protocols and endpoints come from the supported_endpoint_types field in the MoleAPI model catalog.
How do I switch an existing project to claude-fable-5?
Keep the MoleAPI API address and key, replace the model parameter with the model ID on this page, then check protocol-specific parameter differences.
Where do the claude-fable-5 model details come from?
Only availability, billing, and protocol facts from the MoleAPI catalog are currently verified, so unconfirmed model specifications are not added.