Anthropic: Claude Fable 5
Anthropic
Capabilities
Strengths
- Exceptional long-context reasoning with 1M token window
- Strong multimodal vision and file input capabilities
- Excellent performance across coding, analysis, and conversation tasks
- Extended thinking support for complex multi-step problems
Weaknesses
- High output pricing ($50/M) limits cost-effective large-scale deployment
- Slower inference speed typical of large flagship models
- Closed-source weights prevent self-hosting and full data control
- Limited transparency on training methodology and data sourcing
Pricing
Input / 1M tokens
$10
Output / 1M tokens
$50
Context window
1,000k
Transparency
Open weights
0.0 / 10
Open training data
0.0 / 10
Open methodology
3.5 / 10
Licence openness
1.0 / 10
Provider disclosure
5.0 / 10
FMTI company score
N/A
Closed-source model with limited public disclosure of training methods or data sourcing. Anthropic publishes research on Constitutional AI and safety, but proprietary details remain undisclosed. Output pricing of $50/M tokens indicates flagship capability tier.
Sustainability
Inference energy
N/A
Training footprint
N/A
Provider infrastructure
5.0 / 10
No publicly disclosed green infrastructure commitments or energy efficiency metrics for this model. Anthropic's sustainability practices are not well-documented in public sources. Default conservative assessment pending additional transparency.