Claude Fable 5.1 pricing
Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and… Claude Fable 5.1 from Anthropic costs $10.00 per 1M input tokens and $50.00 per 1M output tokens. Cached input is $0.250 per 1M. Context window 1,000,000 tokens.
API id claude-fable-5.1 · Anthropic · source · updated 2026-09-25 · general-purpose
$10.00
Input / 1M tokens
$50.00
Output / 1M tokens
$0.250
Cached input / 1M
1M
Context window
Claude Fable 5.1 specifications
- Provider
- Anthropic
- API id
claude-fable-5.1- Model type
- general-purpose
- Context window
- 1M tokens
- Max output
- 128K tokens
- Currency
- USD
- Price source
- First-party
- Last checked
- 2026-09-25
Claude Fable 5.1 across providers
The same model, priced by every seller we track. Ranked by the cost of 1M input + 1M output tokens, standard tier; savings measured against buying from the vendor directly.
| Provider | Input /1M | Cached /1M | Output /1M | 1M in + 1M out | vs vendor |
|---|---|---|---|---|---|
| $10.00 | $0.250 | $50.00 | $60.00 | — | |
OpenRouterHost | $10.00 | $0.250 | $50.00 | $60.00 | — |
What Claude Fable 5.1 costs in practice
| Workload | Input tokens | Output tokens | Estimated cost |
|---|---|---|---|
| Short chat turn | 1,000 | 500 | $0.04 |
| Document summary | 50,000 | 2,000 | $0.60 |
| 1M tokens in, 200K out | 1,000,000 | 200,000 | $20.00 |
Estimates use the standard tier and ignore caching discounts, so real bills with repeated prompt prefixes are typically lower.
Common questions
- How much does Claude Fable 5.1 cost per 1M tokens?
- Claude Fable 5.1 costs $10.00 per 1M input tokens and $50.00 per 1M output tokens on the standard tier. Cached input is $0.250 per 1M.
- What is Claude Fable 5.1's context window?
- Claude Fable 5.1 accepts up to 1,000,000 tokens in a single request, and can return up to 128,000 output tokens.
- Is there a cheaper Claude model than Claude Fable 5.1?
- Yes. Claude Haiku 3.5 is $0.800 per 1M input tokens versus $10.00 for Claude Fable 5.1.
- Where does this Claude Fable 5.1 price come from?
- Directly from Anthropic's published pricing page, re-read every day and normalized to USD per 1,000,000 tokens.
Head-to-head comparisons
Other Claude models
- Claude Mythos 5.1 $10.00
- Claude Fable 5 $10.00
- Claude Mythos 5 $10.00
- Claude Opus 5.5 $4.00
- Claude Opus 5 $5.00
- Claude Opus 4.8 $5.00
- Claude Opus 4.7 $5.00
- Claude Opus 4.6 $5.00
- Claude Opus 4.5 $5.00
- Claude Opus 4.1 $15.00
- Claude Opus 4 $15.00
- Claude Sonnet 5 $2.00
- Claude Sonnet 4.6 $3.00
- Claude Sonnet 4.5 $3.00
- Claude Sonnet 4 $3.00
- Claude Haiku 4.5 $1.00