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Anthropic Β· Closed

Claude Fable 5.1 API Member pricing vs list price

anthropic/claude-fable-5-1

Closed

Claude Fable 5.1 is the highest-priced Anthropic model on Bearer Club, at $10.00 per 1M input tokens and $50.00 per 1M output tokens at list, with a 1M-token context window. It has the same list price as GPT-6 Astra. A model at this price suits work where the quality of one answer matters more than its cost. It is for members only.

Claude Fable 5.1 prices per 1M tokens

Input / output, by membership tier and data policy. Every price is a percent of the provider's public list price.

Claude Fable 5.1 prices per 1M tokens by tier and data policy
TierPrivateResearch ShareFinancial incentive notice
List price$10.00 input, $50.00 output per 1M tokens
GuestMembers onlyBecome a MemberMembers onlyBecome a Member
Member$9.50 input, $47.50 output per 1M tokens5% off list price$9.00 input, $45.00 output per 1M tokens10% off list price
Executive$8.50 input, $42.50 output per 1M tokens15% off list price$8.00 input, $40.00 output per 1M tokens20% off list price

Does Member pay for itself on Claude Fable 5.1?

Member costs $199 a year. At list price, a Member Private key saves $0.50 per 1M input tokens and $2.50 per 1M output tokens. It pays for itself at about $3,980 a year ($332 a month) of Claude Fable 5.1 spend at list price.

At $10.00 per 1M input tokens that is only about 398M input tokens a year, or 33M a month. Reading 500 documents a month at 20,000 tokens each is 10M input tokens, 30% of that; output tokens bring the point closer.

Executive ($1,999 a year) pays for itself on Claude Fable 5.1 alone above $13,327 a year of spend at list price with a Private key or $9,995 with Research Share, and it costs less than Member once Private spend at list passes $1,500 a month.

  • Member ($199 a year) pays for itself once your Claude Fable 5.1 spend at list price passes $332 a month with a Private key (about 17M tokens at a 3:1 input-to-output mix) or $166 a month with Research Share.
  • Executive ($1,999 a year) costs less than Member above $1,500 a month (Private keys), about 75M tokens a month.

100M tokens a month at 3 input : 1 output is $2,000 a month at list price.

At this volume Executive Β· Research Share saves $233 a month against list price.

Monthly cost of Claude Fable 5.1 by plan at 100M tokens a month
PlanUsage / moFee / moNet vs list / moPays off above
Member Β· Private$1,900$16.58$83.4217M tokens
Member Β· Research Share$1,800$16.58$1838.3M tokens
Executive Β· Private$1,700$167$13356M tokens
Executive Β· Research Share$1,600$167$23342M tokens

Usage at each plan's price per token. The fee is the annual membership fee divided by 12 and covers every model, so spend on other models counts toward it too.

Specs

Claude Fable 5.1 specs
ProviderAnthropic
Model typeClosed (proprietary API)
Context window1,000,000 tokens (1M)
Input and outputText in, text out (chat completions)
Model IDanthropic/claude-fable-5-1
EndpointPOST https://api.bearer.club/v1/chat/completions
PlansMember, Executive
List price per 1M tokens$10.00 input, $50.00 output

List price rank: 68th lowest input price and 68th lowest output price of the 69 models. Its context window is larger than 33 of them.

What Claude Fable 5.1 is best at

Reference answers where cost is secondary

Gold-standard answers for evaluating other AI systems, the authoritative version of a dataset or rubric, or a single deliverable others will be judged against: work done rarely, where the model's price is a small part of the cost.

Literature synthesis across a corpus

A 1M-token window holds dozens of full research papers in one request, so a synthesis can work from the full text instead of retrieved chunks. Reading 500,000 input tokens costs about $5.00 at list, so size the corpus to the question.

Multi-party document review

Merger agreements, multi-party contracts and regulatory submissions with cross-referenced exhibits are where a higher price tier can pay for itself. Check Claude Fable 5.1's answers against cases your reviewers have already resolved before you rely on it.

What 1,000 requests cost

Example request shapes, priced per 1,000 requests from the per-token prices above.

Cost of 1,000 Claude Fable 5.1 requests by request shape and plan
Request (input / output tokens)List priceMember PrivateExecutive Private
Short chat reply1,000 / 300$25.00$23.75$21.25
Document summary20,000 / 1,000$250$238$213
Long-context read200,000 / 2,000$2,100$1,995$1,785

Claude Fable 5.1 vs similar models

  • vs Claude Opus 5.5: Claude Opus 5.5 costs $4.00 per 1M input tokens at list, 2.5Γ— cheaper than Claude Fable 5.1. Use Claude Fable 5.1 only where your evals show Claude Opus 5.5 falling short on your task.
  • vs GPT-6 Astra: GPT-6 Astra costs $10.00 input and $50.00 output per 1M tokens at list (the same as Claude Fable 5.1 on input), with a 1,050,000-token window, larger than Claude Fable 5.1's 1,000,000. Choose by your existing integrations and your own domain evals.
  • Claude Opus 5.5

    Anthropic's Opus tier

    $4.00 input / $20.00 output at list, 2.5Γ— cheaper than Claude Fable 5.1 at a 3:1 mix; 1M-token context; closed, members only.

  • Claude Opus 4.8

    Earlier Opus

    $5.00 input / $25.00 output at list, 2Γ— cheaper than Claude Fable 5.1 at a 3:1 mix; 1M-token context; closed, members only.

  • GPT-6 Astra

    OpenAI GPT-6 Astra

    $10.00 input / $50.00 output at list, the same as Claude Fable 5.1 at a 3:1 mix; 1M-token context; closed, members only.

  • Claude Sonnet 5.5

    Anthropic's Sonnet tier

    $2.00 input / $10.00 output at list, 5Γ— cheaper than Claude Fable 5.1 at a 3:1 mix; 1M-token context; closed, members only.

  • GPT-5.5

    OpenAI GPT-5.5

    $5.00 input / $30.00 output at list, 44% cheaper than Claude Fable 5.1 at a 3:1 mix; 1M-token context; closed, members only.

Data policy for this model

Private: Your prompts and outputs are never used for training and never shared or licensed. For security, abuse prevention and debugging we store request and response content, encrypted, and delete it after 30 days; error details may be kept longer. We also keep usage details (model, tokens, cost, latency, status and time). The model provider may keep requests briefly for abuse monitoring under its own terms.

Research Share: available. Opt in per key and pay less. Data from that key will be used to accelerate AGI and supplied to top frontier labs for AGI purposes, and only for traffic after you opt in.

How the Research Program works

Regions

Each model is served only in the regions its provider supports. Per-model region details are not published yet.

Use Claude Fable 5.1 with the OpenAI SDK

Change two settings: point the SDK at https://api.bearer.club/v1 and use your Bearer Club key, then pass anthropic/claude-fable-5-1 as the model.

curl https://api.bearer.club/v1/chat/completions \  -H "Authorization: Bearer $BEARER_CLUB_API_KEY" \  -H "Content-Type: application/json" \  -d '{    "model": "anthropic/claude-fable-5-1",    "messages": [{"role": "user", "content": "Hello from the Club!"}]  }'

The official OpenAI SDKs and most OpenAI-compatible tools, such as Cursor, Cline, Continue, Open WebUI and LiteLLM, work the same way; the name of the base URL setting varies by tool.

Claude Fable 5.1 FAQ

When should I use Claude Fable 5.1 instead of Claude Opus 5.5?

When your evals show Claude Opus 5.5 failing on your specific task, not as a default. Claude Opus 5.5 is 2.5Γ— cheaper than Claude Fable 5.1 on input.

What context window does Claude Fable 5.1 support?

1,000,000 tokens, roughly 750,000 English words. The prompt and the answer together have to fit in it.

What is the Member break-even on Claude Fable 5.1?

About $3,980 a year ($332 a month) of Claude Fable 5.1 spend at list with a Private key, which is only about 398M input tokens a year at its price.

Is Executive worth it at Claude Fable 5.1's price?

Executive ($1,999 a year) pays for itself on Claude Fable 5.1 alone above $13,327 a year of spend at list price with a Private key or $9,995 with Research Share, and it costs less than Member once Private spend at list passes $1,500 a month.

Is Claude Fable 5.1 available on the Guest tier?

No. Claude Fable 5.1 is a closed model from Anthropic, and it needs a Member ($199 a year) or Executive ($1,999 a year) membership.

What is the model ID for Claude Fable 5.1 on Bearer Club?

Use anthropic/claude-fable-5-1 as the model in requests to https://api.bearer.club/v1/chat/completions. The same id appears in the https://api.bearer.club/v1/models list.

Further reading

Discounts are measured against each provider's public list price and vary by model, membership tier and data policy. See Pricing.