Claude Fable 5.1 pricing and specs
Claude Fable 5.1 pricing and specsClaude model for demanding reasoning and long-horizon agentic work
Claude Fable 5.1 price per 1M tokens
| Type | ₽ / 1M | $ / 1M |
|---|---|---|
| Input tokens | 845 ₽ | $10 |
| Output tokens | 4 225 ₽ | $50 |
| Cache read | 21,13 ₽ | $0.25 |
| Cache write | 1 056 ₽ | $12.5 |
Prices in rubles as of 18.09.2026 at the CBR rate: 1 $ = 84.51 ₽.
Claude Fable 5.1 specs and limits
- Context window
- 1M
- Max output
- 128K
- Input
- text, image, pdf
- Output
- text
- Family
- claude-fable
- Released
- 2026-09-01
- Updated
- 2026-09-01
- Knowledge cutoff
- 2026-06
- Also known as
- claude ai fable 5.1, anthropic fable 5.1, claude api fable 5.1, claude opus fable 5.1, claude sonnet fable 5.1
What Claude Fable 5.1 can do
- ✓Reasoning
- ✓Tool calling
- ✓Structured output
- ✓Attachments / files
- ✓Vision (images)
- —Temperature control
- —Open weights
Frequently asked questions
How much does the Claude Fable 5.1 API cost?
Input costs $10 per 1M tokens (845 ₽) and output costs $50 per 1M (4,225 ₽). Anthropic bills the prompt and the completion separately, so the price of a call depends on how long both are. Ruble figures use the Bank of Russia rate of 84.51 ₽ per dollar for September 2026.
How much do 1,000 Claude Fable 5.1 tokens cost?
List prices are quoted per 1M tokens, so 1,000 tokens cost a thousandth of that: divide $10 for input and $50 for output by 1,000. The same rates in rubles are 845 ₽ and 4,225 ₽ per 1M tokens. Both prompt tokens and completion tokens are billed.
How many tokens does Claude Fable 5.1 hold?
The Claude Fable 5.1 context window is 1M tokens (1,000,000). Everything shares that budget: the system prompt, the dialogue history, attached files and the answer the model writes. The figure comes from the Anthropic model card as of September 2026.
What are the Claude Fable 5.1 limits?
The context window is 1M tokens (1,000,000) and a single response is capped at 128K tokens, so longer output has to be generated in parts. Rate limits are set by Anthropic per account and depend on your plan rather than on the model, so they are not listed here.
How is the Claude Fable 5.1 price in rubles calculated?
Providers quote their tariffs in US dollars, so the ruble amounts here are a conversion at the official Bank of Russia rate of 84.51 ₽ per dollar. For Claude Fable 5.1 that gives 845 ₽ per 1M input tokens and 4,225 ₽ per 1M output tokens. When the rate moves, the ruble price moves with it.
How is Claude Fable 5.1 different from other Claude models?
Claude Fable 5.1 belongs to the Claude Fable family at Anthropic. Models in the Claude line differ in context size, price per 1M tokens and supported capabilities, so compare them by the numbers on their cards rather than by the name. Every Claude model is listed on the provider page.
Can Claude Fable 5.1 reason?
Yes, Claude Fable 5.1 declares a reasoning mode: it works through intermediate steps before it answers. Those steps add output tokens, so a call with a long reasoning chain costs more and takes longer than a plain completion. Capabilities declared for the model: reasoning, tool calling, image input, structured output.
What capabilities does Claude Fable 5.1 support?
The declared capabilities of Claude Fable 5.1 are: reasoning, tool calling, image input, structured output. It accepts text, images, PDF as input, and every attachment consumes tokens from the shared context window of 1M tokens. The list comes from the Anthropic model card and is refreshed with the catalog as of September 2026.