Kimi K3.1 Pro vs Mistral Small
Comparing Kimi K3.1 Pro and Mistral Small across benchmarks, pricing, and capabilities.
Moonshot AI · Mistral AI · Updated for 2026
Which is better?
Kimi K3.1 Pro and Mistral Small trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.
On price, Mistral Small is roughly 13.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Kimi K3.1 Pro also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Kimi K3.1 Pro
- you process long inputs — it offers a 1,048,576 token context window
- you want the most recent training data — it shipped Oct 2026
Choose Mistral Small
- cost matters — it's about 13.3x cheaper per token
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Individual benchmarks
30 reported for Kimi K3.1 Pro · 0 for Mistral Small
Kimi K3.1 Pro and Mistral Smalldon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
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 10.0x more expensive than Mistral Small ($0.20/1M tokens).
For output processing, Kimi K3.1 Pro ($10.00/1M tokens) is 16.7x more expensive than Mistral Small ($0.60/1M tokens).
In conclusion, Kimi K3.1 Pro is more expensive than Mistral Small.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Kimi K3.1 Pro accepts 1,048,576 input tokens compared to Mistral Small's 32,768 tokens. Kimi K3.1 Pro can generate longer responses up to 1,048,576 tokens, while Mistral Small is limited to 32,768 tokens.
Input capabilities
Documented input modalities across available providers
Kimi K3.1 Pro supports multimodal inputs, whereas Mistral Small does not.
Kimi K3.1 Pro can handle both text and other forms of data like images, making it suitable for multimodal applications.
Kimi K3.1 Pro
Mistral Small
Release Timeline
When each model was launched
Kimi K3.1 Pro was released on 2026-10-23, while Mistral Small was released on 2024-09-17.
Kimi K3.1 Pro is 26 months newer than Mistral Small.
Oct 23, 2026
2 days ago
2.1yr newerSep 17, 2024
2.1 years ago
Knowledge 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. Mistral Small is available from Mistral AI.
Kimi K3.1 Pro
Mistral Small
Outputs Comparison
Judge for yourself.
Run your own prompts against Kimi K3.1 Pro and Mistral Small side-by-side, then vote on the output you prefer.
FAQ
Common questions about Kimi K3.1 Pro vs Mistral Small.