Claude Mythos Preview vs IBM Granite 4.2 30B
Claude Mythos Preview leads the LLM Stats Score 55.7 to 24.0.
Anthropic · IBM · Updated for 2026
Which is better?
Claude Mythos Preview leads the overall LLM Stats Score 55.7 to 24.0, ranking #3 overall.
In the 4 individual benchmarks reported for both models, Claude Mythos Preview wins 4; 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 4 of 4 exact shared results
Choose IBM Granite 4.2 30B
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
16 reported for Claude Mythos Preview · 18 for IBM Granite 4.2 30B
Claude Mythos Preview outperforms in 4 benchmarks (GPQA, SWE-bench Multilingual, SWE-Bench Pro, SWE-Bench Verified), while IBM Granite 4.2 30B is better at 0 benchmarks.
Claude Mythos Preview significantly outperforms across most benchmarks.
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 30B 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
IBM Granite 4.2 30B
License
Usage and distribution terms
Claude Mythos Preview is licensed under a proprietary license, while IBM Granite 4.2 30B uses Apache 2.0.
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
Apache 2.0
Open weights
Release Timeline
When each model was launched
IBM Granite 4.2 30B was released on 2026-08-25, while Claude Mythos Preview's release date is not specified.
We can confirm IBM Granite 4.2 30B's release timeline, but cannot make a direct age comparison without Claude Mythos Preview's release date.
—
Aug 25, 2026
5 days ago
Knowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude Mythos Preview and IBM Granite 4.2 30B side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude Mythos Preview vs IBM Granite 4.2 30B.