Claude Fable 5.1
Top of the Claude 5 family. Terminal-Bench 4.0 55.8%, DeepSWE 67.4%, HLE with tools 65%
- Vendor
- Anthropic
- License
- closed
- Released
- 2026-09-01
- Parameters
- Undisclosed
- Context window
- 1M tokens
Capabilities
Text, image, and file input with tool calling, extended reasoning, and computer use. Built for multi-hour agentic sessions. Cache reads cut to $0.25 per million.
- Vision — image input
- Audio — audio input (not confirmed)
- Tools — function calling / tool use
- Reasoning — extended thinking
- Computer use — desktop / browser control
Benchmarks
| SWE-Bench Verified | Not published |
|---|---|
| SWE-Bench Pro | Not published |
| Terminal-Bench | Not published |
| Reasoning composite | Not published |
The reasoning composite is a directional 0–100 score aggregated across public reasoning evals — comparable within this matrix, not an official vendor number.
Pricing
$10/M input tokens · $50/M output tokens.