1M
text, file, image
text
Supported
About this model
Claude Fable 5.1 is Anthropic's frontier intelligence model designed for demanding reasoning, long-horizon agentic work, advanced software engineering, multistep research, and complex enterprise workflows. It is built for tasks that can span hours and multiple applications, with strong planning, tool orchestration, failure recovery, coding, document understanding, and vision capabilities. The model supports a 1M-token context window, adaptive reasoning that is always enabled, and up to 128K output tokens.
Input modalities
text
Accepted as model input
file
Accepted as model input
image
Accepted as model input
Providers
Available routing options for this model through OneInfer.
Input tokens
$10.000 / 1M tokens
Output tokens
$50.000 / 1M tokens
Routing
OneInfer optimized
Pricing
Current OneInfer pricing for this model.
| Usage | Price |
|---|---|
| Input tokens | $10.000 / 1M tokens |
| Output tokens | $50.000 / 1M tokens |
| Cached input tokens | $0.250 / 1M tokens |
Performance
Published evaluation results associated with this model.
Agentic
Coding
Knowledge
Reasoning
API example
- 1
Generate your access token
Use your API key to generate the JWT access token required by the Models API.
- 2
Add the JWT token
Copy the generated JWT token and replace
JWT_TOKENin the example below. - 3
Check your credits
If your balance is too low, before calling the model.
- 4
Run the API example
Choose your preferred language, copy the example, and send your first model request.
curl https://api.oneinfer.ai/v1/ula/chat/completions \ -H "Authorization: Bearer $JWT_TOKEN" \ -H "Content-Type: application/json" \ -d '{ "model": "anthropic/claude-fable-5.1", "messages": [ { "role": "user", "content": "Hello!" } ] }'