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Claude Fable 5 vs Hy4 preview

Claude Fable 5 leads the LLM Stats Score 55.3 to 51.5.

Anthropic · Tencent · Updated for 2026

Which is better?

Claude Fable 5 leads the overall LLM Stats Score 55.3 to 51.5, ranking #4 overall.

In the 4 individual benchmarks reported for both models, Hy4 preview wins 3; this is a narrower head-to-head signal than the composite indexes.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Claude Fable 5

  • overall performance matters — it scores 55.3 and ranks #4 on LLM Stats
  • your work emphasizes coding — it leads those capability indexes

Choose Hy4 preview

  • you value its reported benchmark strengths — it wins 3 of 4 exact shared results
  • you want the most recent training data — it shipped Aug 2026
  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Claude Fable 5
Anthropic
Hy4 preview
Tencent
Core performance indexes
LLM Stats Score
55.3
#4
51.5
#10
Reasoning
52.6
#6
51.2
#8
Coding
47.2
#2
40.9
#10
Agents
41.0
#2
37.1
#11
Cost, coverage & limits
Benchmark wins
1 of 4
3 of 4
Input price
$10.00 / M
— / M
Output price
$50.00 / M
— / M
Context window
1,000,000
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

2 shared
Index
Claude Fable 5
Hy4 preview
Math
41.7#5
40.3#12
Tool use
24.8#31
32.6#7
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

18 reported for Claude Fable 5 · 32 for Hy4 preview

4 shared

Claude Fable 5 outperforms in 1 benchmarks (SWE-Bench Pro), while Hy4 preview is better at 3 benchmarks (AutomationBench, BioMysteryBench, Terminal-Bench 2.1).

Hy4 preview shows notably better performance in the majority of benchmarks.

Tue Sep 01 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Claude Fable 5 specifies input context (1,000,000 tokens). Only Claude Fable 5 specifies output context (128,000 tokens).

Anthropic
Claude Fable 5
Input1,000,000 tokens
Output128,000 tokens
Tencent
Hy4 preview
Input- tokens
Output- tokens
Tue Sep 01 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Claude Fable 5 supports multimodal inputs, whereas Hy4 preview does not.

Claude Fable 5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Fable 5

Text
Images
Audio
Video

Hy4 preview

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Fable 5 is licensed under a proprietary license, while Hy4 preview uses Apache 2.0.

License differences may affect how you can use these models in commercial or open-source projects.

Claude Fable 5

Proprietary

Closed source

Hy4 preview

Apache 2.0

Open weights

Release Timeline

When each model was launched

Claude Fable 5 was released on 2026-06-09, while Hy4 preview was released on 2026-08-28.

Hy4 preview is 3 months newer than Claude Fable 5.

Claude Fable 5

Jun 9, 2026

2 months ago

Hy4 preview

Aug 28, 2026

3 days ago

2mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Claude Fable 5 and Hy4 preview side-by-side, then vote on the output you prefer.

Claude Fable 5
✓ Preferred
Hy4 preview
Open in Playground

FAQ

Common questions about Claude Fable 5 vs Hy4 preview.

Which is better, Claude Fable 5 or Hy4 preview?

Claude Fable 5 leads the LLM Stats Score 55.3 to 51.5. Claude Fable 5 is made by Anthropic and Hy4 preview is made by Tencent. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Fable 5 compare to Hy4 preview in benchmarks?

Claude Fable 5 scores SWE-Bench Verified: 95.0%, FrontierSWE: 90.0%, OSWorld-Verified: 85.0%, Terminal-Bench 2.1: 84.3%, SWE-Bench Pro: 80.0%. Hy4 preview scores GPQA: 92.3%, Terminal-Bench 2.1: 85.4%, WideSearch: 83.9%, MCP Atlas: 83.7%, SWE-bench Multilingual: 82.9%.

What are the context window sizes for Claude Fable 5 and Hy4 preview?

Claude Fable 5 supports 1.0M tokens and Hy4 preview supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Fable 5 and Hy4 preview?

Key differences include LLM Stats Score (55.3 vs 51.5), multimodal support (yes vs no), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Fable 5 and Hy4 preview?

Claude Fable 5 is developed by Anthropic and Hy4 preview is developed by Tencent.

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