AnthropicAIWS category: AI ModelActive
Claude Fable 5.1
Anthropic's frontier model for demanding reasoning, long-horizon agentic coding, multistep research and complex knowledge work.
Facts Verified
Sep 1, 2026
Verification
Verified
Profile
Source-backed
Context
1M tokens
Max output
128K tokens
API
Available
Specifications
Context
1M tokens
Max output
128K tokens
CompanyAnthropic
Release DateSep 1, 2026
Provider statusActive
LicenseNot published
API availabilityAvailable
Capability Map
Verified fieldsReasoning
Supported
Image input
Supported
Audio input
Not supported
Video input
Not supported
API access
Available
Native input modalities
TextImages
Native output: Text
Native output is what the model returns directly. Tool capabilities are separate.
Developer API Rates
Verified public rateInput / 1M
$10.00
Output / 1M
$50.00
Cached $0.2500 / 1M
Key Strengths
- Long-horizon agentic work
- Agentic coding
- Multistep research
- Large-context knowledge work
Limitations & Trade-offs
- Higher token price than Claude Opus 5
- Comparatively slower latency
Provider API model ID
Use this identifier in the provider API where supported.
claude-fable-5-1