Kimi K3.1 Pro vs Particle-1
Kimi K3.1 Pro leads the LLM Stats Score 55.5 to 31.9. Particle-1 is 9.1x cheaper per token.
Moonshot AI · Particle AI · Updated for 2026
Which is better?
Kimi K3.1 Pro leads the overall LLM Stats Score 55.5 to 31.9, ranking #5 overall.
In the 2 individual benchmarks reported for both models, Kimi K3.1 Pro wins 2; this is a narrower head-to-head signal than the composite indexes.
On price, Particle-1 is roughly 9.1x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Kimi K3.1 Pro
- overall performance matters — it scores 55.5 and ranks #5 on LLM Stats
- your work emphasizes reasoning — it leads those capability indexes
- you value its reported benchmark strengths — it wins 2 of 2 exact shared results
Choose Particle-1
- cost matters — it's about 9.1x cheaper per token
- you want the most recent training data — it shipped Oct 2026
At a glance
The differences that matter most.
Individual benchmarks
30 reported for Kimi K3.1 Pro · 3 for Particle-1
Kimi K3.1 Pro outperforms in 2 benchmarks (BabyVision, GPQA), while Particle-1 is better at 0 benchmarks.
Kimi K3.1 Pro significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Kimi K3.1 Pro ($2.00/1M tokens) is 8.0x more expensive than Particle-1 ($0.25/1M tokens).
For output processing, Kimi K3.1 Pro ($10.00/1M tokens) is 10.0x more expensive than Particle-1 ($1.00/1M tokens).
In conclusion, Kimi K3.1 Pro is more expensive than Particle-1.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Both models have the same input context window of 1,048,576 tokens. Kimi K3.1 Pro can generate longer responses up to 1,048,576 tokens, while Particle-1 is limited to 131,072 tokens.
Input capabilities
Documented input modalities across available providers
Both Kimi K3.1 Pro and Particle-1 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Kimi K3.1 Pro
Particle-1
Release Timeline
When each model was launched
Kimi K3.1 Pro was released on 2026-10-23, while Particle-1 was released on 2026-10-28.
Particle-1 is 0 month newer than Kimi K3.1 Pro.
Oct 23, 2026
4 days ago
Oct 28, 2026
-1 days ago
5d newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
Kimi K3.1 Pro is available from Moonshot AI. Particle-1 is available from Particle AI.
Kimi K3.1 Pro
Particle-1
Outputs Comparison
Judge for yourself.
Run your own prompts against Kimi K3.1 Pro and Particle-1 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Kimi K3.1 Pro vs Particle-1.