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Claude Fable 5.1 vs IBM Granite 4.2 3B

Claude Fable 5.1 leads the LLM Stats Score 54.8 to 15.6.

Anthropic · IBM · Updated for 2026

Which is better?

Claude Fable 5.1 leads the overall LLM Stats Score 54.8 to 15.6, ranking #5 overall.

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

Choose Claude Fable 5.1

  • overall performance matters — it scores 54.8 and ranks #5 on LLM Stats
  • your work emphasizes reasoning and agents — it leads those capability indexes
  • you want the most recent training data — it shipped Sep 2026

Choose IBM Granite 4.2 3B

  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Claude Fable 5.1
Anthropic
IBM Granite 4.2 3B
IBM
Core performance indexes
LLM Stats Score
54.8
#5
15.6
#214
Reasoning
52.1
#7
12.0
#235
Agents
39.3
#6
2.0
#153
Cost, coverage & limits
Benchmark wins
—
—
Input price
$10.00 / M
— / M
Output price
$50.00 / M
— / M
Context window
1,000,000
—

Individual benchmarks

7 reported for Claude Fable 5.1 · 13 for IBM Granite 4.2 3B

No common benchmarks found

Claude Fable 5.1 and IBM Granite 4.2 3Bdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Claude Fable 5.1 specifies input context (1,000,000 tokens). Only Claude Fable 5.1 specifies output context (128,000 tokens).

Anthropic
Claude Fable 5.1
Input1,000,000 tokens
Output128,000 tokens
IBM
IBM Granite 4.2 3B
Input- tokens
Output- tokens
Tue Sep 01 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Claude Fable 5.1 supports multimodal inputs, whereas IBM Granite 4.2 3B does not.

Claude Fable 5.1 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Fable 5.1

Text
Images
Audio
Video

IBM Granite 4.2 3B

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Fable 5.1 is licensed under a proprietary license, while IBM Granite 4.2 3B uses Apache 2.0.

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

Claude Fable 5.1

Proprietary

Closed source

IBM Granite 4.2 3B

Apache 2.0

Open weights

Release Timeline

When each model was launched

Claude Fable 5.1 was released on 2026-09-01, while IBM Granite 4.2 3B was released on 2026-08-25.

Claude Fable 5.1 is 0 month newer than IBM Granite 4.2 3B.

Claude Fable 5.1

Sep 1, 2026

0 days ago

1w newer
IBM Granite 4.2 3B

Aug 25, 2026

1 weeks ago

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 5.1 and IBM Granite 4.2 3B side-by-side, then vote on the output you prefer.

Claude Fable 5.1
✓ Preferred
IBM Granite 4.2 3B
Open in Playground

FAQ

Common questions about Claude Fable 5.1 vs IBM Granite 4.2 3B.

Which is better, Claude Fable 5.1 or IBM Granite 4.2 3B?

Claude Fable 5.1 leads the LLM Stats Score 54.8 to 15.6. Claude Fable 5.1 is made by Anthropic and IBM Granite 4.2 3B is made by IBM. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Fable 5.1 compare to IBM Granite 4.2 3B in benchmarks?

Claude Fable 5.1 scores OSWorld 2.0: 77.9%, CursorBench v3.2: 73.4%, Humanity's Last Exam: 65.0%, GDPval-AA: 61.8%, Terminal-Bench 4.0: 55.8%. IBM Granite 4.2 3B scores AIME 2025: 78.3%, IFBench: 74.3%, LiveCodeBench v6: 69.7%, MMLU-Pro: 67.8%, RULER 64k: 67.5%.

What are the context window sizes for Claude Fable 5.1 and IBM Granite 4.2 3B?

Claude Fable 5.1 supports 1.0M tokens and IBM Granite 4.2 3B 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 5.1 and IBM Granite 4.2 3B?

Key differences include LLM Stats Score (54.8 vs 15.6), 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 5.1 and IBM Granite 4.2 3B?

Claude Fable 5.1 is developed by Anthropic and IBM Granite 4.2 3B is developed by IBM.

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