Anthropic: Claude Fable 5
Claude Fable 5 is a Mythos-class model from Anthropic, built for autonomous knowledge work and coding.
AnthropicClaude Fable 5
anthropic/claude-fable-5Coding index
76.5
Artificial Analysis
Agentic index
50.7
Artificial Analysis
Design Arena
1254 Elo · #1
agentichtmlslides · 59.4% wins
Input
$10
per 1M tokens
Output
$50
per 1M tokens
Cached input
$1
per 1M tokens
Context
1M
tokens it reads
Max output
128K
tokens it writes
Claude Fable 5 is a Mythos-class model from Anthropic, built for autonomous knowledge work and coding. It supports text, image, and file inputs with text output, with reasoning support and...
inspect — the catalog entry
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"hugging_face_id": null,
"name": "Anthropic: Claude Fable 5",
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"description": "Claude Fable 5 is a Mythos-class model from Anthropic, built for autonomous knowledge work and coding. It supports text, image, and file inputs with text output, with reasoning support and...",
"context_length": 1000000,
"architecture": {
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"input_modalities": [
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"output_modalities": [
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"tokenizer": "Claude",
"instruct_type": null
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"pricing": {
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"completion": "0.00005",
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"input_cache_write": "0.0000125",
"input_cache_write_1h": "0.00002"
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"is_moderated": true
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"per_request_limits": null,
"supported_parameters": [
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"default_parameters": {
"temperature": null,
"top_p": null,
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"frequency_penalty": null,
"presence_penalty": null,
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"supported_voices": null,
"knowledge_cutoff": null,
"expiration_date": null,
"links": {
"details": "/api/v1/models/anthropic/claude-5-fable-20260609/endpoints"
},
"endpoints": [
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"rank": 1
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"win_rate": 63.1,
"rank": 4
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{
"arena": "agents",
"category": "mobileapps",
"elo": 1262,
"win_rate": 60.4,
"rank": 6
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"arena": "agents",
"category": "python-pptxslides",
"elo": 1250,
"win_rate": 61.4,
"rank": 4
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"category": "dataviz",
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"category": "svg",
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"win_rate": 62.6,
"rank": 8
},
{
"arena": "models",
"category": "uicomponent",
"elo": 1313,
"win_rate": 58.1,
"rank": 14
},
{
"arena": "models",
"category": "website",
"elo": 1294,
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],
"artificial_analysis": {
"intelligence_index": null,
"coding_index": 76.5,
"agentic_index": 50.7
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"reasoning": {
"mandatory": true,
"supported_efforts": [
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"default_effort": "high"
}
}References (1)
- Stored model catalog — Nov 6, 2026