Plain-English Summary
Anthropic’s premium everyday work model, tuned for high-quality documents, spreadsheets, analysis, and agent workflows.
Claude Fable 5
Anthropic’s premium everyday work model, tuned for high-quality documents, spreadsheets, analysis, and agent workflows.
Claude 5
Reasoning LLM
GA
Open weights: No
API: Yes
Technical Notes
Multimodal text-and-image model with always-on adaptive reasoning, 1M context, 128K output, and strong tool use.
Best For
Professional knowledge work, spreadsheets, documents, agents
Watch Out For
Premium pricing; reasoning cannot be fully disabled.
Model Specs
- Maker
- Anthropic
- Country
- USA
- Family
- Claude 5
- Type
- Reasoning LLM
- Release date
- 2026-06-09
- Date confidence
- Exact
- Status
- GA
- Context window
- 1,000,000 tokens
- Max output
- 128,000
- Parameters
- Not disclosed
- Active parameters
- Not disclosed
- Architecture
- Proprietary multimodal transformer
- Reasoning
- Yes — adaptive, always on
- Tool calling
- Yes
- Structured output
- Yes
- API available
- Yes
- Open weights
- No
- Self-hostable
- No
- License
- Proprietary
- Inputs
- Text, image
- Outputs
- Text
- Approx. price
- $10 input / $50 output per 1M tokens
- How to access
- Provider website or API
- Model / API ID
- claude-fable-5
- Knowledge cutoff
- 2026-01
- Fine-tuning
- Prompting / RAG
- Completeness
- 90 %
- Verified
- Jul 18, 2026
- Snapshot date
- Jul 18, 2026
- Source
- Official source