Kimi K2-Instruct-0905 vs Mercury 3
Mercury 3 leads the LLM Stats Score 36.1 to 21.1.
Moonshot AI · Inception · Updated for 2026
Which is better?
Mercury 3 leads the overall LLM Stats Score 36.1 to 21.1, ranking #98 overall.
In the 2 individual benchmarks reported for both models, Mercury 3 wins 2; 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 Kimi K2-Instruct-0905
- you need open weights you can self-host or fine-tune
Choose Mercury 3
- overall performance matters — it scores 36.1 and ranks #98 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you value its reported benchmark strengths — it wins 2 of 2 exact shared results
- you want the most recent training data — it shipped Oct 2026
At a glance
The differences that matter most.
Individual benchmarks
29 reported for Kimi K2-Instruct-0905 · 12 for Mercury 3
Kimi K2-Instruct-0905 outperforms in 0 benchmarks, while Mercury 3 is better at 2 benchmarks (GPQA, Multi-Challenge).
Mercury 3 significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Context Window
Maximum input and output token capacity
Only Mercury 3 specifies input context (1,000,000 tokens). Only Mercury 3 specifies output context (131,072 tokens).
License
Usage and distribution terms
Kimi K2-Instruct-0905 is licensed under MIT, while Mercury 3 uses a proprietary license.
License differences may affect how you can use these models in commercial or open-source projects.
MIT
Open weights
Proprietary
Closed source
Release Timeline
When each model was launched
Kimi K2-Instruct-0905 was released on 2025-09-05, while Mercury 3 was released on 2026-10-19.
Mercury 3 is 14 months newer than Kimi K2-Instruct-0905.
Sep 5, 2025
1.1 years ago
Oct 19, 2026
0 days ago
1.1yr newerKnowledge 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 Kimi K2-Instruct-0905 and Mercury 3 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Kimi K2-Instruct-0905 vs Mercury 3.