Claude Fable 5.2 Fast is Anthropic's language model with a 1.0M context window and up to 128K output tokens, starting at $16.00 / 1M input and $80.00 / 1M output. A low-latency variant of Claude Fable 5.2 optimized for faster response times in reasoning and agentic tasks.
Specifications
Canonical IDanthropic-claude-5-2-fable-fast
TypeLanguage
StatusActive
CreatorAnthropicAnthropic
Providers
Context Window1.0M tokens
Max Output128K tokens
Input ModalitiesImagePDF
Output ModalitiesText
Reasoning Effortsdefaultxhigh

Capabilities

Input2/5
Text·
Image✓
Audio·
Video·
PDF✓
Output1/5
Text✓
Image·
Audio·
Video·
Embedding·
Capabilities7/13
Reasoning✓
Adaptive Reasoning·
Function Calling✓
Parallel Function Calling·
Structured Outputs✓
Native JSON Schema✓
Web Search✓
URL Context·
Computer Use✓
Code Execution·
File Search·
Prompt Caching✓
Assistant Prefill·

Pricing by Provider

US Dollar ($)
Per 1M tokens
ProviderStandard
Input
$ / 1M
Output
$ / 1M
Cache Read
$ / 1M
Cache Write 5m
$ / 1M
Cache Write 1h
$ / 1M
Azure AI Foundry logo
Azure AI Foundry
azure_ai/claude-fable-5-2-fast
$16.00$80.00$0.4$20.00$32.00

Cost Calculator

US Dollar ($)
Preset:

Versions

VersionReleasedContextInput / 1MOutput / 1MStatus
Claude Fable 5.21.0M$8.00$40.00Available
Claude Fable 5.2 Batch1.0M$4.00$20.00Available
Claude Fable 5.11.0M$5.00$25.00Available
Claude Fable 51.0M$5.00$25.00Available
Claude Fable 51.0M$10.00$50.00Available
Claude Fable 5.2 Fast—1.0M$16.00$80.00Current
Claude Fable 5.3————Available
Claude Fable 5.5—1.0M——Available
Claude Fable1.0M$8.00$40.00Available

Other Models

ModelTierReleasedContextInput / 1MOutput / 1M
Claude Haiku 5.5Haiku1.0M$0.100$0.500
Claude Haiku 5.5 BatchHaiku1.0M$0.050$0.250
Claude Sonnet 5.5Sonnet1.0M$2.00$10.00
Claude Sonnet 5.5 BatchSonnet1.0M$1.00$5.00
Claude Opus 5.5Opus1.0M$4.00$20.00
Claude Opus 5.5Opus1.0M$2.00$10.00
Claude Fable 5.1—1.0M$10.00$50.00
Claude Opus 5Opus1.0M$5.00$25.00
Claude Opus 5Opus1.0M$2.50$12.50
Claude Sonnet 5Sonnet1.0M$2.00$10.00

Model IDs

anthropic-claude-5-2-fable-fast
azure_ai/claude-fable-5-2-fast