Anthropic: Claude Fable 5.1 (batch)
The Claude Fable 5.1 is an AI model developed by Anthropic that supports multiple input modalities, including text, image, and file inputs. It can handle long contexts of up to 1 million characters and provides tools for reasoning and structured output, though the latter's specifics are not detailed. This model may be worth considering for those with a budget of $5-25 per million tokens and a need for versatility in input types. With a blended benchmark score of 100 across three independent evaluations, it demonstrates strong performance in various tasks. However, its pricing is on the higher end among the models available, making it less accessible to those with limited budgets.
Benchmark results
Independent, published benchmarks. Blended score 100.0 across 3 benchmarks, last refreshed 2026-09-04. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 100.0 |
| AI Index Coding | software engineering tasks | 100.0 |
| AI Index Agentic | multi-step tool-using tasks | 100.0 |
- Model ID
- anthropic/claude-fable-5.1:batch
- Vendor
- anthropic
- Released
- September 2026
- Tokenizer
- Claude
- Input Modalities
- text, image, file
- Output Modalities
- text
- Max Output
- 128,000 tokens
- Tool Calling
- ✓ supported
- Structured Output
- ✓ supported
- Reasoning Mode
- ✓ supported
- Vision
- ✓ accepts images
- Audio
- no
- Moderated
- yes
What it costs in practice
Computed from the current $5.00/M input and $25.00/M output rates. Run your own numbers →
| Job | Tokens | Cost |
|---|---|---|
| Summarize a 50-page report | 30k in / 1.5k out | $0.19 |
| Classify 1,000 customer emails | 500k in / 50k out | $3.75 |
| A month of a busy support chatbot | 5M in / 2M out | $75.00 |
Category rankings
Where Anthropic: Claude Fable 5.1 (batch) places across the 3 categories it ranks in. How we rank →
| # | Category | Score |
|---|---|---|
| #25 | Agent WorkflowsAgents · of 25 ranked | 196 |
| #25 | Browser AutomationAgents · of 25 ranked | 174 |
| #25 | Coding AgentsAgents · of 25 ranked | 196 |
Similar models
Claude Opus 5
Anthropic: Claude Fable 5 (batch)
Anthropic: Claude Opus 4.8
Anthropic: Claude Opus 4.7
Anthropic: Claude Opus 4.6
Anthropic: Claude Opus 4.5
Quick answers
- How much does Anthropic: Claude Fable 5.1 (batch) cost?
- $5.00 per million input tokens and $25.00 per million output tokens.
- What is Anthropic: Claude Fable 5.1 (batch)'s context window?
- 1,000,000 tokens, roughly 1,500 pages of text in a single request.
- Does Anthropic: Claude Fable 5.1 (batch) support tool calling?
- It supports tool calling, structured output, a reasoning mode.
- Can Anthropic: Claude Fable 5.1 (batch) process images?
- Yes, it accepts image input.