Claude Fable 5 — Especificações
| Desenvolvedor | Anthropic |
|---|---|
| Tipo | LLM (raciocínio de ponta) |
| Modalidade | Texto, Visão → Texto |
| Parâmetros | Não divulgado |
| Janela de contexto | 1 milhão |
| Saída máxima | 128K |
| Licença | Proprietário |
| Pesos abertos | Não |
| Lançado | 2026 |
| Preço da entrada | US$ 10,00 por 1 milhão |
| Preço da saída | US$ 50,00 por 1 milhão |
| Provedores de API | Anthropic, AWS |
O que é o Claude Fable 5?
Claude Fable 5 is Anthropic’s most capable widely released model, positioned above the
Opus tier and priced accordingly at $10 in / $50 out per million tokens. Thinking is always
on — there is no non-reasoning mode to fall back to — which is what makes it strong on
long-horizon agentic work and what makes it expensive on anything trivial. It pairs a
1M-token context window with a 128K maximum output, an unusually large generation budget
that matters when the task is producing a long artifact rather than answering a question.
The economics only work at the top of the difficulty curve. At $50 per million output
tokens, Fable 5 costs roughly five times Claude Opus 4.8 on the output side, so routing
ordinary requests to it burns budget for no measurable gain. The sensible pattern is a
router: Fable 5 for the small share of tasks where a wrong answer is expensive — multi-step
agents that run unattended, deep research, refactors across a large codebase — and a
Sonnet- or Haiku-tier model for everything else. If your workload is mostly retrieval and
summarisation, the price gap will dominate your bill long before capability does.
Claude Fable 5 pricing: API cost per 1M tokens
| Entrada (por 1 milhão de tokens) | $10.00 |
|---|---|
| Saída (por 1 milhão de tokens) | $50.00 |
| Output/input ratio | 5× |
| Blended (4:1 in:out) | $18.00 per 1M tokens |
What Claude Fable 5 costs per month
Real monthly spend at a 4:1 input-to-output mix — the ratio a typical chat or RAG workload actually produces.
| Carga de trabalho | Tokens/mês | Cost / month |
|---|---|---|
| Projeto paralelo | 1 milhão de tokens de entrada / 0,25 milhão de tokens de saída | $23 |
| Equipe pequena | 20 milhões de tokens de entrada / 5 milhões de tokens de saída | $450 |
| Produção | 200 milhões de tokens de entrada / 50 milhões de tokens de saída | $4,500 |
Run your own numbers in the Calculadora de custos de API de IA.
Cheaper alternatives to Claude Fable 5
| Modelo | Custo médio ponderado por US$ 1 milhão | You save |
|---|---|---|
| Claude Opus 5 | $9.00 | 50% cheaper |
| GPT-5.6 Sol | $10.00 | 44% cheaper |
| Kimi K3 aberta | $5.40 | 70% cheaper |
Perguntas frequentes
How much does Claude Fable 5 cost per 1M tokens?
Claude Fable 5 costs $10.00 per 1M input tokens and $50.00 per 1M output tokens. At a typical 4:1 input-to-output mix that blends to about $18.00 per 1M tokens.
How much does Claude Fable 5 cost per month?
A small-team workload of 20M input and 5M output tokens a month costs about $450 on Claude Fable 5. A side project (1M in / 0.25M out) costs roughly $22.50.
What is a cheaper alternative to Claude Fable 5?
Claude Opus 5 is the strongest cheaper option in our database at $9.00 per 1M blended — about 50% less than Claude Fable 5.
Can I run Claude Fable 5 locally?
No. Claude Fable 5 is a closed, API-only model — the weights are not released, so it cannot be self-hosted.
Why does Claude Fable 5 charge more for output than input?
Output tokens are generated one at a time and cannot be batched the way a prompt can, so they cost the provider more to serve. Claude Fable 5 charges 5× more for output, which is why prompt-heavy workloads are far cheaper to run than generation-heavy ones.
See every Claude model priced side by side: Claude API pricing.
Prices are the published list rates for the model's primary API and are reviewed as providers change them. Volume, batch and cached-input discounts are not included. Compare every model side by side in the Banco de dados de modelos de IA ou o Ranking de LLMs.
