Moonshot AI: Kimi K3

Kimi K3 is Moonshot AI's 2.8T-parameter open-weight multimodal reasoning model, released 2026-07. It targets complex coding, knowledge work, and long-horizon agentic workflows, with particular strength in large-repository navigation, tool use, debugging, and iterating against images, logs, and runtime feedback. Its KDA architecture with attention residuals improves computational efficiency.

Modalities
inTextinImageinVideooutText
Price / 1M−44%
$2.00 / $8.00$3.00 / $15.00
Context
1.049M
Knowledge cutoff

Capabilities

ReasoningVisionTool useLong contextPrompt cachingStructured output

Channels

Same weights on every channel. Requests route to the cheapest healthy one; the channel used is printed on each billing line.

Provider
Discount
Input /M
Output /M
Cache Read /M
Cache Create 5m /M
Cache Create 1h /M
Defaultstable
−44%
$2.00
$8.00
$0.25

Cost Calculator

Pick a channel and a usage scenario, then drag to your workload — each scenario assumes a different prompt-cache hit rate.

Channel
Scenario
Unit $2.00 / $8.00 /1MDaily chat: 40% cache hit assumed · cache read $0.25 /1M
List price $907.20On MirAPI$508.80/ moYou save $398.40Create an API key

Benchmarks

bar = score (0–100) · ▏ median

Scores from vendor reports and public leaderboards. No private evals.

Intelligence Index
General ability
59.7
#5
Coding Index
Code
76.2
#6
Agentic Index
Agentic
54.3
#8
GPQA Diamond
Science QA
91.8
#7
τ-bench (airline)
Agentic tool use
71.3
#43

Showcase

Three fixed prompts, identical for every chat model. Outputs are archived verbatim — copy the prompt to reproduce.

Task prompt · identical for all models
Build a single-file HTML page using three.js from a CDN: a low-poly planet with a tilted ring of ~200 orbiting particles, a soft key light plus rim light, slow auto-rotation, and drag-to-orbit controls. No build tools — one file only.
Archived output
Archive not published yet

Every model will run this exact prompt; the output lands here verbatim, with tokens and per-run cost.

Quick Start

import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.mirapi.ai/v1",   # changed
    api_key=os.environ["MIRAPI_API_KEY"],   # changed
)

resp = client.chat.completions.create(
    model="moonshotai/kimi-k3",
    messages=[{"role": "user", "content": "Hello"}],
)
Wire Kimi K3 into your product

1M free tokens to start · no card · OpenAI-compatible, one base_url change

Start free