Claude Fable 5.1 API pricing
Anthropic · Premium price tier · Frontier quality · Proprietary · released 2026-09. Prices in USD per 1 million tokens. Data snapshot: 2026-10-22.
Claude Fable 5.1 has held the same list price since 2026-09-01 and is the 20th cheapest of 31 models in the Premium price tier. None of its 4 hosts undercuts the price we quote. It is a model in the Premium price tier released within the last 3 months, the period in which versions and prices change most.
- Input: $10.00 per 1M tokens
- Output: $50.00 per 1M tokens
- Batch API (in/out): $5.00 / $25.00 per 1M tokens
- Prompt-cache read: $0.25 per 1M tokens
- Context window: 1M tokens
- Arena ELO: 1501 as of 2026-10-08
Available on
Direct API, AWS Bedrock, Azure AI Foundry, Google Vertex, OpenRouter
AWS Bedrock regions: ap-northeast-1, ap-southeast-1, eu-central-1, eu-west-1, us-east-1, us-east-2, us-west-2
Curated by hand; check with the provider before committing.
Market position
On blended price ($38.00 per 1M tokens at 30% input, 70% output) it is cheaper than 27% of models in the Premium price tier: 20th cheapest of 31, tied with 3 others. Across every price tier it is cheaper than 3% of priced text models in the catalogue: 297th cheapest of 308, tied with 3 others. Its Arena ELO of 1501 ranks 4th of the 156 models that carry one, above 98% of them. With an Arena score of 1501, Claude Fable 5.1 clears OptimNow's Frontier-grade, Strong and Standard working quality thresholds: Frontier-grade (Arena 1500+), used for coding task and agent workflow; Strong (Arena 1465+), used for support ticket, knowledge Q&A and marketing content; Standard (Arena 1415+), used for meeting summary, invoice processing and call summary. Each threshold is a distance below the best ranked model, which scores 1525 on Arena scores as of 8 Oct 2026.
Licence, size and capabilities
Claude Fable 5.1 is recorded here as proprietary: access is through an API, priced by the token. Its parameter count is not published. Listed capabilities: Text, Vision, Reasoning, Agents. Filling its 1M context window once costs $10.00 in input tokens at list price.
Pricing by host
A host is a company that runs the model and sells it by the token: the model maker, a cloud platform like Amazon Bedrock, Azure or Vertex, or an independent host. One model, several hosts, and often several prices. This model is sold by 4 different hosts. The price we quote elsewhere on this page is marked. We quote one host's rate so that models stay comparable; it is not a recommendation to buy there.
The price we quote is already the cheapest of the 4 hosts: Anthropic at $10.00 input / $50.00 output per 1M tokens. All of them charge within 10% of one another.
| Host | Input $/1M | Output $/1M |
|---|---|---|
| Anthropic (model maker, price we quote) | $10.00 | $50.00 |
| Azure (price we quote) | $10.00 | $50.00 |
| Amazon Bedrock (price we quote) | $10.00 | $50.00 |
| Google (price we quote) | $10.00 | $50.00 |
List prices as published on 2026-10-22, via OpenRouter. Negotiated rates, committed-use discounts and provisioned capacity are not shown.
Monthly cost at 100K requests, by business use case
From the after-discounts figure (prompt caching on the cached input share, batch API for async workloads, only where Anthropic publishes those rates), which assumes you implement both, to the list price. One figure means no discount is published.
| Use case | Tokens (in/out) | Monthly (after discounts – list) |
|---|---|---|
| Support Ticket | 1,500 / 500 | $3.2K – $4.0K |
| Knowledge Q&A | 2,000 / 800 | $4.7K – $6.0K |
| Meeting Summary | 10,000 / 1,200 | $7.7K – $16.0K |
| Marketing Content | 2,500 / 1,800 | $11.0K – $11.5K |
| Coding Task | 3,000 / 2,000 | $11.6K – $13.0K |
| Invoice Processing | 1,500 / 600 | $2.1K – $4.5K |
| Call Summary | 2,000 / 700 | $2.7K – $5.5K |
| Agent Workflow | 6,000 / 3,000 | $17.1K – $21.0K |
Price history
Claude Fable 5.1 entered our daily price archive on 2026-09-01; tracking began on 2026-08-15. It listed at $10.00 input / $50.00 output per 1M tokens that day. No list price change since 2026-09-01. Last checked against the 2026-10-22 snapshot.
Alternatives to Claude Fable 5.1
- Next cheaper model in the Premium price tier: GPT-4 Turbo (OpenAI) at $24.00 blended, 37% less.
- Next more expensive: o1 (OpenAI) at $46.50 blended, 22% more.
The nearest models in the Premium price tier on Arena ELO, each with its blended price and score difference against Claude Fable 5.1.
- Claude Fable 5 (Anthropic): $10.00 in / $50.00 out per 1M, Arena ELO 1504 (same blended price, 3 ELO points higher)
- Claude Opus 4.6 (Anthropic): $5.00 in / $25.00 out per 1M, Arena ELO 1498 (50% cheaper, 3 ELO points lower)
- Claude Opus 5.5 (Anthropic): $4.00 in / $20.00 out per 1M, Arena ELO 1507 (60% cheaper, 6 ELO points higher)
- Claude Opus 4.7 (Anthropic): $5.00 in / $25.00 out per 1M, Arena ELO 1494 (50% cheaper, 7 ELO points lower)
- Cheapest within 15 Arena points: Gemini 3.7 Flash (Google), 93% cheaper, 15 ELO points lower, out of 13 models in that band.
- Highest Arena ELO within 20% of this price: Claude Fable 5 (Anthropic), same blended price, 3 ELO points higher, out of 3 models in that price band.
Other models from Anthropic
The 8 nearest to Claude Fable 5.1 in price, of 14 other Anthropic models in the catalogue. Prices per 1M tokens, input then output.
- Claude Opus 5.5: $4.00 / $20.00
- Claude Opus 4.5: $5.00 / $25.00
- Claude Opus 4.6: $5.00 / $25.00
- Claude Opus 4.7: $5.00 / $25.00
- Claude Opus 4.8: $5.00 / $25.00
- Claude Opus 5: $5.00 / $25.00
- Claude Fable 5: $10.00 / $50.00
- Claude Opus 4.1: $15.00 / $75.00
All 15 Anthropic models and prices
Common questions about Claude Fable 5.1 pricing
- How much does Claude Fable 5.1 cost?
- Claude Fable 5.1 costs $10.00 per 1M input tokens and $50.00 per 1M output tokens. That is the model maker's own rate (Anthropic). Prices as listed on 2026-10-22.
- Which host is cheapest for Claude Fable 5.1?
- The price we quote is already the cheapest of the 4 hosts: Anthropic at $10.00 input / $50.00 output per 1M tokens. All of them charge within 10% of one another. Host rates as listed on 2026-10-22.
- Does Claude Fable 5.1 offer batch or cached pricing?
- Yes, both. Batch API pricing is $5.00 per 1M input tokens and $25.00 per 1M output tokens, and prompt-cache reads cost $0.25 per 1M tokens, as listed on 2026-10-22.
- What would Claude Fable 5.1 cost per month?
- With the Support Ticket profile (1,500 input and 500 output tokens per request), 100,000 requests a month cost about $4.0K on Claude Fable 5.1 at the list price quoted on 2026-10-22.
- Can Claude Fable 5.1 be self-hosted?
- No, as far as this site records. Claude Fable 5.1 is recorded here as proprietary: access is through an API, priced by the token.
- Has the price of Claude Fable 5.1 changed?
- Claude Fable 5.1 entered our daily price archive on 2026-09-01; tracking began on 2026-08-15. It listed at $10.00 input / $50.00 output per 1M tokens that day. No list price change since 2026-09-01. Last checked against the 2026-10-22 snapshot.
These are list prices. Your real cost also depends on caching and batching, negotiated discounts, marketplace agreements, and the contracts you already have. OptimNow audits exactly that.
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