Claude Fable 5.1
$10.00 per 1M input tokens and $50.00 per 1M output tokens · 1M context · vision, tools, reasoning, JSON.
Prices checked Oct 21, 2026 · tracked by LLM Cost Index since Oct 21, 2026
Cheaper ways to run the same model: Claude Fable 5.1 (batch) at $5.00 / $25.00 — same model, different service (e.g. batch processing with a delay).
What Claude Fable 5.1 costs per month
Estimated monthly bill for typical workloads, using the cached-input price for repeated context. Try your own numbers in the cost calculator.
| Workload | Per month |
|---|---|
| Customer chatbot 1,000 conversations a day, 8 turns each | $5,694 |
| Document Q&A (RAG) 500 questions a day over retrieved documents | $1,187 |
| Coding / tool-using agent 200 tasks a day, long tool-heavy contexts | $2,168 |
| Content generation 30 long articles a day | $140 |
| Classification / extraction 100,000 short items a day | $11,250 |
Price history
We started tracking Claude Fable 5.1 on Oct 21, 2026; the chart appears as soon as there is a second data point. See all recent price changes.
Where to run Claude Fable 5.1: 4 providers
Amazon Bedrock is the cheapest at $10.00 input / $50.00 output per 1M tokens. Uptime is the average over the last 30 days as reported by OpenRouter; see provider reliability.
| Provider | Input / 1M | Output / 1M | Context | Uptime | Notes |
|---|---|---|---|---|---|
| Amazon Bedrock | $10.00 | $50.00 | 1M | — | — |
| Anthropic | $10.00 | $50.00 | 1M | 100% | — |
| Azure | $10.00 | $50.00 | 1M | 100% | — |
| $10.00 | $50.00 | 1M | 100% | — |
Cheaper alternatives to Claude Fable 5.1
Models with the same tool calling, image input, structured output for at least 20% less (3:1 input/output mix), most capable first.
| Model | Input / 1M | Output / 1M | Context | Capabilities |
|---|---|---|---|---|
| Claude Opus 5.5 Anthropic | $4.00 | $20.00 | 1M | visiontoolsreasoningJSON |
| Claude Sonnet 5.5 Anthropic | $2.00 | $10.00 | 1M | visiontoolsreasoningJSON |
| Gemini 4 Argon | $2.00 | $10.00 | 1.05M | visionaudiotoolsreasoningJSON |
| GPT-6.1 Sol OpenAI | $2.00 | $10.00 | 1.05M | visiontoolsreasoningJSON |
| Claude Opus 5 Anthropic | $5.00 | $25.00 | 1M | visiontoolsreasoningJSON |
How to pay less for Claude Fable 5.1
For a customer chatbot (1,000 conversations a day, 8 turns each) that costs $7,800 a month at list price without caching:
| Option | Per month | You save |
|---|---|---|
| Move to Claude Opus 5.5 (similar capabilities) | $2,299 | $5,501 (71%) |
| Switch to Claude Fable 5.1 (batch) | $3,900 | $3,900 (50%) |
| Use prompt caching (60% of input cached) | $5,694 | $2,106 (27%) |
Other workloads: cut-your-bill tool for Claude Fable 5.1.
Specifications
| Model ID | anthropic/claude-fable-5.1 |
| Input | text, image, file |
| Output | text |
| Tool calling | Yes |
| Structured output | Yes |
| Reasoning mode | Yes |
| Open weights | No |
| Released | Sep 1, 2026 |
| Web search | $0.01 per request |
FAQ
- How much does Claude Fable 5.1 cost?
- $10.00 per million input tokens and $50.00 per million output tokens; cached input costs $0.25 per million. Prices as of Oct 21, 2026.
- What is the context window of Claude Fable 5.1?
- 1M tokens, with up to 128K output tokens per response.
- Does Claude Fable 5.1 support images, tools and structured output?
- Images as input: yes. Tool calling: yes. Structured (JSON) output: yes. Reasoning mode: yes.
- What are cheaper alternatives to Claude Fable 5.1?
- Models with the same key capabilities for at least 20% less include Claude Opus 5.5 ($4.00 / $20.00), Claude Sonnet 5.5 ($2.00 / $10.00), Gemini 4 Argon ($2.00 / $10.00).
More from Anthropic: all Anthropic models · how we collect prices