Claude Mythos Preview vs LFM3-1.7B
Claude Mythos Preview leads the LLM Stats Score 54.3 to 25.0.
Anthropic · Liquid AI · Updated for 2026
Which is better?
Claude Mythos Preview leads the overall LLM Stats Score 54.3 to 25.0, ranking #7 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 54.3 and ranks #7 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 LFM3-1.7B
- 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 · 20 for LFM3-1.7B
Claude Mythos Preview outperforms in 4 benchmarks (GPQA, Humanity's Last Exam, SWE-bench Multilingual, SWE-Bench Verified), while LFM3-1.7B 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 LFM3-1.7B 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
LFM3-1.7B
License
Usage and distribution terms
Claude Mythos Preview is licensed under a proprietary license, while LFM3-1.7B uses LFM Open License v1.0.
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
LFM Open License v1.0
Open weights
Release Timeline
When each model was launched
LFM3-1.7B was released on 2026-10-27, while Claude Mythos Preview's release date is not specified.
We can confirm LFM3-1.7B's release timeline, but cannot make a direct age comparison without Claude Mythos Preview's release date.
—
Oct 27, 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.
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude Mythos Preview and LFM3-1.7B side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude Mythos Preview vs LFM3-1.7B.