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MODEL LIBRARY

Anthropicanthropic / claude-fable-5-1

Claude Fable 5.1

Claude model for demanding reasoning and long-horizon agentic work

Provider
Anthropic (anthropic)
Model identifier
claude-fable-5-1
Library category
Chat
Source update
2026-09-01
Release date
2026-09-01
Provider documentation
https://docs.anthropic.com/en/docs/about-claude/models

Source pricing and conditions

Costs retain the source structure, tiers and conditions. These snapshot values are not Allgate API quotes. Cost currency and provider billing currency are separate fields; each defaults to USD when absent.

Cost currency: USD · Provider billing currency: USD. Input, output, reasoning, cache and audio token fields use the cost currency per million tokens. Explicit per-image, per-second and per-10,000-character fields retain their named units and resolution conditions.

Tier prices apply above the stated size. When tiers exist, source logic ignores the legacy context_over_200k field. Scheduled prices override stated fields within their window; omitted fields inherit base prices. Source pricing schema

cache_read
0.25
cache_write
12.5
input
10
output
50

Model metadata

Original source field names and values are preserved. False, zero, empty objects and missing values remain distinct. Missing capabilities are not inferred from a name, category or related version.

attachment
true
canonical_model_id
anthropic/claude-fable-5-1
description
Claude model for demanding reasoning and long-horizon agentic work
family
claude-fable
id
claude-fable-5-1
knowledge
2026-06
last_updated
2026-09-01
limit
context
1000000
output
128000
modalities
input
  1. text
  2. image
  3. pdf
output
  1. text
name
Claude Fable 5.1
open_weights
false
reasoning
true
reasoning_options
  1. type
    effort
    values
    1. low
    2. medium
    3. high
    4. xhigh
    5. max
release_date
2026-09-01
structured_output
true
temperature
false
tool_call
true

Provider reference

Provider documentation and billing metadata belong to the listed source provider. They do not describe Allgate routing or account configuration.

id
anthropic
name
Anthropic
doc
https://docs.anthropic.com/en/docs/about-claude/models
billing
cacheWrite1h
2

About this reference

This library reproduces the public llm-metadata snapshot: 592 model entries from 50 providers. This community maintained source does not independently verify every provider claim. Model identifiers belong to their listed provider; matching names from different providers remain separate entries. llm-metadata

Reference metadata does not establish Allgate availability or prices. Check the live model catalogue for current service and rates. Missing fields remain unknown. Source update dates are not substituted for release dates; retrieval dates are not model update dates. View live catalogue

Source: llm-metadata · Apache-2.0 · Retrieved · Source generated · Snapshot provenance