Decision support

Kimi K3.1 Pro vs MiMo-V2.6-Pro-UltraSpeed

Compare canonical objects directly. The useful dimensions change with the object type, so model and hardware comparisons stay separate.

Models Hardware

Kimi K3.1 Pro

Moonshot AI

Sources:models.devOpenRouter

MiMo-V2.6-Pro-UltraSpeed

Xiaomi

Sources:models.devOpenRouter

Benchmark results

Arena Text
Arena rating · Higher is better
- Kimi K3.1 Pro
  1483
  Arena #24CI 1472 to 1494
- MiMo-V2.6-Pro-UltraSpeed
  Not reported
Runs and sources
Kimi K3.1 Pro
max148395% CI 1472 to 1494 · 3,443 votes
MiMo-V2.6-Pro-UltraSpeed
Not reported
Source:Arena Text leaderboard, 2026-11-09
Arena WebDev
Arena rating · Higher is better
- Kimi K3.1 Pro
  1688
  Arena #11CI 1678 to 1697
- MiMo-V2.6-Pro-UltraSpeed
  Not reported
Runs and sources
Kimi K3.1 Pro
max168895% CI 1678 to 1697 · 4,916 votes
MiMo-V2.6-Pro-UltraSpeed
Not reported
Source:Arena WebDev leaderboard, 2026-11-10
Agent Arena
IPS score · Higher is better
- Kimi K3.1 Pro
  +0.049
  Arena #15CI +0.038 to +0.060
- MiMo-V2.6-Pro-UltraSpeed
  Not reported
Runs and sources
Kimi K3.1 Pro
max+0.04995% CI +0.038 to +0.060 · 6,446,421 observations
MiMo-V2.6-Pro-UltraSpeed
Not reported
Source:Agent Arena leaderboard, 2026-11-11

Each model's best published result is shown; "Not reported" means no matched evaluation, not a score of zero. Arena and DeepSWE ranks are the leaderboards' own; other ranks are among catalogue models with a score. Results from different harnesses or settings are not directly comparable.

Arena ratings: Arena (lmarena-ai/leaderboard-dataset), licensed CC BY 4.0. Ratings come from pairwise human votes and are only comparable within one leaderboard; the interval is Arena's 95% confidence interval. Model names are matched to the Vertical Tabs catalog.

Model specifications

Release date

October 23, 2026

September 21, 2026

Context window

Native context

—

Max output tokens

943,718

131,072

Knowledge cutoff

—

Open weights

Parameter count

2.8T

—

API pricing · USD per 1M tokens

Input

$0.2375

$4.35

Output

$8.7856

$8.70

Cached input

$0.19

$0.036

Cache write

—

Capabilities and modalities

Input modalities

text, image, video

text, image, video, audio

Output modalities

text

Tool calling

Supported

Reasoning option

Supported

Supported options

frequency_penalty, include_reasoning, logit_bias, logprobs, max_tokens, min_p, presence_penalty, reasoning, reasoning_effort, repetition_penalty, response_format, seed, stop, structured_outputs, temperature, tool_choice, tools, top_k, top_logprobs, top_p

frequency_penalty, include_reasoning, max_tokens, presence_penalty, reasoning, response_format, stop, structured_outputs, temperature, tool_choice, tools, top_p

Capabilities

vision, thinking, completion, tools

—

Architecture and availability

Architecture

kimi-k3

—

Model families

kimi-k3

—

Tokenizer

Other

Instruction format

—

License

—

Providers

Provider endpoints

Ollama variants

Metadata source

ai-research

models.dev

A dash means the field is not reported. Provider-specific performance and pricing may differ.

Benchmark results

Arena Text

Arena WebDev

Agent Arena

Model specifications

API pricing · USD per 1M tokens

Capabilities and modalities

Architecture and availability