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Claude Mythos Preview vs IBM Granite 4.2 3B

Claude Mythos Preview leads the LLM Stats Score 55.7 to 15.6.

Anthropic · IBM · Updated for 2026

Which is better?

Claude Mythos Preview leads the overall LLM Stats Score 55.7 to 15.6, ranking #3 overall.

In the 1 individual benchmarks reported for both models, Claude Mythos Preview wins 1; 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 Mythos Preview

  • overall performance matters — it scores 55.7 and ranks #3 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 1 of 1 exact shared results

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 Mythos Preview
Anthropic
IBM Granite 4.2 3B
IBM
Core performance indexes
LLM Stats Score
55.7
#3
15.6
#213
Reasoning
56.5
#1
12.0
#234
Coding
45.3
#3
-6.7
#247
Agents
36.8
#12
2.0
#152
Cost, coverage & limits
Benchmark wins
1 of 1
0 of 1
Input price
$25.00 / M
— / M
Output price
$125.00 / M
— / M
Context window
—
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Claude Mythos Preview
IBM Granite 4.2 3B
Math
47.4#1
13.7#216
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

16 reported for Claude Mythos Preview · 13 for IBM Granite 4.2 3B

1 shared

Claude Mythos Preview outperforms in 1 benchmarks (GPQA), while IBM Granite 4.2 3B is better at 0 benchmarks.

Claude Mythos Preview significantly outperforms across most benchmarks.

Mon Aug 31 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Input capabilities

Documented input modalities across available providers

Claude Mythos Preview supports multimodal inputs, whereas IBM Granite 4.2 3B does not.

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

Claude Mythos Preview

Text
Images
Audio
Video

IBM Granite 4.2 3B

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Mythos Preview 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 Mythos Preview

Proprietary

Closed source

IBM Granite 4.2 3B

Apache 2.0

Open weights

Release Timeline

When each model was launched

IBM Granite 4.2 3B was released on 2026-08-25, while Claude Mythos Preview's release date is not specified.

We can confirm IBM Granite 4.2 3B's release timeline, but cannot make a direct age comparison without Claude Mythos Preview's release date.

Claude Mythos Preview

—

IBM Granite 4.2 3B

Aug 25, 2026

6 days 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 Mythos Preview and IBM Granite 4.2 3B side-by-side, then vote on the output you prefer.

Claude Mythos Preview
✓ Preferred
IBM Granite 4.2 3B
Open in Playground

FAQ

Common questions about Claude Mythos Preview vs IBM Granite 4.2 3B.

Which is better, Claude Mythos Preview or IBM Granite 4.2 3B?

Claude Mythos Preview leads the LLM Stats Score 55.7 to 15.6. Claude Mythos Preview 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 Mythos Preview compare to IBM Granite 4.2 3B in benchmarks?

Claude Mythos Preview scores CyBench: 100.0%, USAMO25: 97.6%, GPQA: 94.6%, SWE-Bench Verified: 93.9%, CharXiv-R: 93.2%. 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 main differences between Claude Mythos Preview and IBM Granite 4.2 3B?

Key differences include LLM Stats Score (55.7 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 Mythos Preview and IBM Granite 4.2 3B?

Claude Mythos Preview is developed by Anthropic and IBM Granite 4.2 3B is developed by IBM.

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