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Claude Fable 5

Scheduled retirement · 2027-06-09Reasoning modelCoding modelClaude Mythos

Claude Fable 5

Release date: 2026-06-09Updated: 2026-09-04Knowledge cutoff: 2026-01Scheduled retirement: 2027-06-09Views: 10,655
Live demoGitHubHugging FaceCompare
Parameters
No data
Context length
1M
Multilingual
Supported
Reasoning ability
5/5

Claude Fable 5 is a reasoning model from Anthropic, released on 2026-06-09. It accepts text and image input and returns text output. The recorded context window is 1M, and the recorded maximum output is 128K. Cataloged capabilities include Reasoning model and Multilingual. The model weights are proprietary and are not published for download. Use the linked references to confirm current access, licensing, and provider-specific limits.

Data sourced primarily from official releases (GitHub, Hugging Face, papers), then benchmark leaderboards, then third-party evaluators. Learn about our data methodology

Claude Fable 5

Model basics

Reasoning traces
Supported
Thinking modes
Thinking Level · Adaptive Thinking (Default)
Context length
1M tokens
Max output length
128K tokens
Model type
Reasoning model
Modality (in / out)
Text, Image → Text
Release date
2026-06-09
Model file size
No data
MoE architecture
No
Total params / Active params
No data / Not applicable
Knowledge cutoff
2026-01
Claude Fable 5

Open source & experience

Code license
Proprietary
Weights license
Proprietary
GitHub repo
N/A
Hugging Face
N/A
Live demo
Claude Fable 5

Official resources

Paper
DataLearnerAI blog
N/A
Claude Fable 5

API details

API speed
3/5
💡Default unit: $/1M tokens. If vendors use other units, follow their published pricing.
Standard
TypeConditionInputOutput
Text-$10.00/ 1M tokens$50.00/ 1M tokens
Batch
TypeConditionInputOutput
Text-$5.00/ 1M tokens$25.00/ 1M tokens
Cache PricingPrompt Cache
TypeTTLWriteRead
Text5m$12.50/ 1M tokens$1.00/ 1M tokens
Text1h$20.00/ 1M tokens

“—” means the modality is not billed in that direction, or the vendor has not published a price for it.

Claude Fable 5

Benchmark Results

Claude Fable 5 currently shows benchmark results led by ARC-AGI-1 (1 / 92, score 98.50), LiveBench (2 / 117, score 79.53), SWE-bench Verified (2 / 116, score 95). This page also consolidates core specs, context limits, and API pricing so you can evaluate the model from benchmark results and deployment constraints together.

Thinking
Tool usage
Internet

General Knowledge

14 evaluations
Benchmark / mode
Score
Rank/total
90.50
33 / 92
ARC-AGI-1
Medium
92.50
25 / 92
95.50
15 / 92
98.50
1 / 92
ARC-AGI-1
Extra-High
98.50
1 / 92
76.80
25 / 85
ARC-AGI-2
Medium
82.50
21 / 85
87.50
10 / 85
89.20
7 / 85
ARC-AGI-2
Extra-High
88.30
9 / 85
75.47
9 / 117
79.53
2 / 117
HLE
Deep
59
9 / 197

General Evaluation

3 evaluations
Benchmark / mode
Score
Rank/total
78.79
155 / 274
83.33
117 / 274
85.86
95 / 274

Coding and Software Engineer

10 evaluations
Benchmark / mode
Score
Rank/total
95
2 / 116
95
2 / 116
WeirdML v2
HighTools
87.85
3 / 52
80.30
2 / 62
70.50
2 / 5
DeepSWE
DeepTools
70
8 / 38
64.90
1 / 7
60.19
1 / 16
APEX-SWE
MaxTools
58.80
1 / 3
FrontierCode 1.1 Main
Extra-HighTools
53.50
1 / 4

Writing and Creative Capabilities

1 evaluations
Benchmark / mode
Score
Rank/total
Creative Writing
Standard Mode
1934.60
7 / 106

Common Sense Reasoning

1 evaluations
Benchmark / mode
Score
Rank/total
SimpleBench
Standard Mode
81.90
5 / 94

Long Context

1 evaluations
Benchmark / mode
Score
Rank/total
76.67
5 / 29

AI Agent - Tool Usage

8 evaluations
Benchmark / mode
Score
Rank/total
88
9 / 53
Terminal-Bench 2.1
Extra-HighTools
83.80
19 / 53
88
9 / 53
85
1 / 26
MCP-Atlas
Standard ModeTools
83.30
7 / 41
44.55
8 / 20
34.10
3 / 11
21.40
5 / 11

Productivity Knowledge

4 evaluations
Benchmark / mode
Score
Rank/total
GDPval-AA v2
MaxTools
1741
8 / 27
AA-Briefcase
MaxTools
1571.79
6 / 20
AA-AnalystAgent
MaxToolsInternet
48.75
4 / 12
11.30
5 / 6

Agent Level Benchmark

2 evaluations
Benchmark / mode
Score
Rank/total
APEX-Agents
MaxTools
59.20
1 / 6
τ³-Banking
MaxTools
38.14
3 / 13

Math and Reasoning

2 evaluations
Benchmark / mode
Score
Rank/total
87.02
3 / 58

Multimodal Understanding

1 evaluations
Benchmark / mode
Score
Rank/total
GeoBench ACW
Standard Mode
89
1 / 20

Compare with other models

Claude Fable 5

Publisher

Claude Fable 5

Model Overview

Claude Fable 5 is a reasoning model from Anthropic, released on 2026-06-09.

It accepts text and image input and produces text output. Its cataloged capabilities include Reasoning model and Multilingual. The recorded context window is 1M, and the recorded maximum output is 128K.

The model weights are proprietary and are not published for download. The page records 11 API pricing rules from Anthropic; current provider pricing and conditions should be checked before deployment. The evaluation section contains 12 cataloged benchmark results with their recorded modes and scores. The page links 2 release, model-card, repository, or provider references for checking the underlying claims. Specifications, availability, and prices can change; undisclosed values are intentionally left unstated.

Claude Fable 5

FAQ

What is Claude Fable 5?

Claude Fable 5 is a reasoning model from Anthropic, released on 2026-06-09. It accepts text and image input and returns text output. The recorded context window is 1M, and the recorded maximum output is 128K. Cataloged capabilities include Reasoning model and Multilingual. The model weights are proprietary and are not published for download. Use the linked references to confirm current access, licensing, and provider-specific limits.

What input and output modalities does Claude Fable 5 support?

The current model record lists text and image as input and text as output.

What are the main recorded specifications for Claude Fable 5?

The recorded context window is 1M, and the recorded maximum output is 128K. Fields without a source-backed value remain undisclosed.

Does Claude Fable 5 have API pricing?

The page records 11 API pricing rules from Anthropic; current provider pricing and conditions should be checked before deployment.

Are benchmark results available for Claude Fable 5?

The evaluation section contains 12 cataloged benchmark results with their recorded modes and scores. Compare only results that use the same benchmark version and evaluation mode.

Is Claude Fable 5 open source?

The model weights are proprietary and are not published for download. Review the linked license text before commercial or derivative use.

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