Kimi K3.1 Pro — Specifications
Compilado por Mustafa Ihsan de la documentación publicada por el proveedor · Última actualización
| Desarrollador | Moonshot AI |
|---|---|
| Tipo | LLM (mixture of experts, razonamiento, multimodal) |
| Modalidad | Texto, imagen → texto |
| Parámetros | 2.8T total / 104B active (MoE, 16 of 896 experts) |
| Ventana de contexto | 1 millón |
| Licencia | Kimi K3.1 Pro License (open weights) |
| Pesos abiertos | Sí |
| Lanzado | 2026-10 |
| Precio de entrada | $2.00 /1M |
| Precio de salida | $10.00 /1M |
| Proveedores de API | Moonshot (Kimi API), OpenRouter |
Ejecútelo localmente
| VRAM (4 bits) | ~1.6 TB (native MXFP4 weights) |
|---|
Benchmarks
| Moonshot-reported | Terminal-Bench 4.0 65.7%; BenchCAD (with tools) 92.7%; OfficeQA Pro v2 64.4. Cached input $0.20 per 1M tokens; Highspeed variant $4.00 / $20.00. |
|---|
What is Kimi K3.1 Pro?
Kimi K3.1 Pro is Moonshot AI’s newest flagship, released on 24 October 2026. According to Moonshot, it is a post-trained version of Kimi K3 with substantially more post-training compute, aimed at coding, 3D creation, financial research and other agentic work. Like K3, it is a 2.8-trillion-parameter mixture-of-experts with 104B active parameters (16 of 896 experts per token) and a 1,048,576-token context window, and it reads text and images. It always thinks; reasoning effort can be set to low, high or max (the default). Moonshot reports 65.7% on Terminal-Bench 4.0, a vendor figure.
On Moonshot’s API, kimi-k3.1-pro costs $2.00 per million input tokens, $10.00 per million output tokens and $0.20 per million cached input tokens; writing to the cache costs $2.00 per million tokens for a 5-minute TTL or $4.00 for a 1-hour TTL. The Highspeed variant, which Moonshot says runs 2–3× faster, costs $4.00 in / $20.00 out. Batch jobs are billed at 60% of the standard price, and the model unlocks after a top-up of at least $1.
That is cheaper than its predecessor Kimi K3 ($3.00 / $15.00), and it is the model Moonshot’s retirement notice for the K2 series points to, which covers Kimi K2.7 Code. The weights are on Hugging Face under the Kimi K3.1 Pro License, which asks Model-as-a-Service businesses with more than $20 million in revenue over 12 months to sign a separate agreement. They ship as 4-bit MXFP4 files totalling about 1.56 TB, so self-hosting is a cluster-scale job and for most teams this is an API decision. Estimate a monthly bill with the Calculadora de costos de API de IA.
Kimi K3.1 Pro pricing: API cost per 1M tokens
| Entrada (por cada millón de tokens) | $2.00 |
|---|---|
| Salida (por cada millón de tokens) | $10.00 |
| Relación salida/entrada | 5× |
| Combinada (4:1 entrada:salida) | $3.60 por 1 millón de tokens |
What Kimi K3.1 Pro costs per month
Gasto mensual real con una mezcla entrada:salida de 4:1, es decir, la proporción que realmente genera una carga de trabajo típica de chat o RAG.
| Carga de trabajo | Tokens/mes | Coste mensual |
|---|---|---|
| Proyecto secundario | 1 millón de tokens de entrada / 0,25 millones de tokens de salida | $4.50 |
| Pequeño equipo | 20 millones de tokens de entrada / 5 millones de tokens de salida | $90 |
| Producción | 200 millones de tokens de entrada / 50 millones de tokens de salida | $900 |
Calcule sus propios números en la Calculadora de costos de API de IA.
Cheaper alternatives to Kimi K3.1 Pro
| Modelo | Dólares por millón combinados | Usted ahorra |
|---|---|---|
| Llama 3.1 8B abierta | $0.0240 | 99 % más barato |
| Mistral NeMo 12B abierta | $0.0292 | 99 % más barato |
| Gemma 3 4B abierta | $0.0600 | 98% cheaper |
¿Autoalojarlo o pagar por la API?
Kimi K3.1 Pro is open-weight, so you can run it yourself. It needs ~1.6 TB (native MXFP4 weights) of VRAM at 4-bit. Self-hosting only beats the API once your volume is high enough to keep that hardware busy — the calculadora de autohospedaje frente a API calcula el punto de equilibrio para su volumen de tokens.
Preguntas frecuentes
How much does Kimi K3.1 Pro cost per 1M tokens?
Kimi K3.1 Pro costs $2.00 per 1M input tokens and $10.00 per 1M output tokens. At a typical 4:1 input-to-output mix that blends to about $3.60 per 1M tokens.
How much does Kimi K3.1 Pro cost per month?
A small-team workload of 20M input and 5M output tokens a month costs about $90 on Kimi K3.1 Pro. A side project (1M in / 0.25M out) costs roughly $4.50.
What is a cheaper alternative to Kimi K3.1 Pro?
Llama 3.1 8B is the strongest cheaper option in our database at $0.0240 per 1M blended — about 99% less than Kimi K3.1 Pro. It is also open-weight, so self-hosting is an option.
Can I run Kimi K3.1 Pro locally?
Yes. Kimi K3.1 Pro is open-weight and needs about ~1.6 TB (native MXFP4 weights) of VRAM at 4-bit quantisation.
Why does Kimi K3.1 Pro charge more for output than input?
Output tokens are generated one at a time and cannot be batched the way a prompt can, so they cost the provider more to serve. Kimi K3.1 Pro charges 5× more for output, which is why prompt-heavy workloads are far cheaper to run than generation-heavy ones.
Los precios corresponden a las tarifas oficiales publicadas para la API principal del modelo y se revisan periódicamente conforme los proveedores los actualicen. No incluyen descuentos por volumen, procesamiento por lotes ni entradas en caché. Compare todos los modelos uno al lado del otro en la Base de datos de modelos de IA o el Clasificación de modelos de lenguaje grande (LLM).