K2 Horizon 32B vs Mercury 2
K2 Horizon 32B and Mercury 2 are closely matched at 30.2 and 23.2 on the LLM Stats Score.
Institute of Foundation Models · Inception · Updated for 2026
Which is better?
K2 Horizon 32B and Mercury 2 are closely matched on the overall LLM Stats Score at 30.2 and 23.2.
The models split the 2 individual benchmarks reported for both models evenly.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose K2 Horizon 32B
- you want the most recent training data — it shipped Sep 2026
- you need open weights you can self-host or fine-tune
Choose Mercury 2
- you want predictable pricing at $0.25/M input and $0.75/M output
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
9 reported for K2 Horizon 32B · 6 for Mercury 2
K2 Horizon 32B outperforms in 1 benchmarks (GPQA), while Mercury 2 is better at 1 benchmark (SciCode).
Both models are evenly matched across the benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Context Window
Maximum input and output token capacity
Only Mercury 2 specifies input context (128,000 tokens). Only Mercury 2 specifies output context (8,192 tokens).
License
Usage and distribution terms
K2 Horizon 32B is licensed under Apache 2.0, while Mercury 2 uses a proprietary license.
License differences may affect how you can use these models in commercial or open-source projects.
Apache 2.0
Open weights
Proprietary
Closed source
Release Timeline
When each model was launched
K2 Horizon 32B was released on 2026-09-03, while Mercury 2 was released on 2026-02-24.
K2 Horizon 32B is 6 months newer than Mercury 2.
Sep 3, 2026
1 months ago
6mo newerFeb 24, 2026
8 months 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 K2 Horizon 32B and Mercury 2 side-by-side, then vote on the output you prefer.
FAQ
Common questions about K2 Horizon 32B vs Mercury 2.