Anthropic / anthropic/claude-fable-5

Claude Fable 5 - access through LLMTR

Claude Fable 5 is the previous generation of the Fable line for long-horizon agent tasks, large codebases, complex knowledge work, and vision-heavy production workflows. It offers a 1M context window, 128K max output, adaptive thinking, vision input, and configurable effort levels. It remains strong for integrations tuned around this generation; for new work Fable 5.1 is more capable at the same base price and reads prompt cache four times cheaper. When you do not need the highest available capability, Opus 5.5 covers the same workloads for less than half the cost. It is subject to Anthropic's 30-day retention requirement.

Technical specifications

Canonical IDanthropic/claude-fable-5
ProviderAnthropic
Context window1,000,000 tokens
OperationsCHAT_COMPLETIONS
Modalitiestext, image

Pricing

An 8% platform margin applies to credit top-ups; model usage prices are not separately marked up.

OperationMetricUnitPrice
CHAT_COMPLETIONSINPUT_TEXTPER_1M_TOKENS$10.00
CHAT_COMPLETIONSOUTPUT_TEXTPER_1M_TOKENS$50.00

Example usage

With existing OpenAI SDK flows, change only the base URL and model identifier.

curl https://llmtr.com/v1/chat/completions   -H "Authorization: Bearer llmtr-your_key"   -H "Content-Type: application/json"   -d '{"model":"anthropic/claude-fable-5","messages":[{"role":"user","content":"Hello"}]}'

Guides about this model

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