Kimi K3.1 Pro API Pricing & Monthly Cost Simulator
Verified 2026 unit economics for Moonshot Kimi K3.1 Pro (moonshotai/kimi-k3.1-pro): $2/1M uncached input, $0.2/1M cached prefix read, and $10/1M output across a 1,048,576-token context window (released 2026-10-23).
Uncached Input (/1M)
$2
Cached Prompt Read (/1M)
$0.2 (-90%)
Output Completion (/1M)
$10
50% Batch API (In / Out)
Real-time API only (no 50% async batch)
Interactive 30-Day Monthly Spend Simulator
Live Unit-Cost & Prompt Cache Slider (Kimi K3.1 Pro)
moonshotai/kimi-k3.1-pro
Estimated 30-day spend
$372.00/mo
Cost per 1,000 calls
$12.4000
Monthly savings vs 0% cache
$108.00/mo
Technical Limits & API Capabilities
Context window
1,048,576
Max output tokens
943,718
Workload tier
Frontier Reasoning
Input modalities
text, image, video
Tool Calling: Yes
JSON Schema Strict: Yes
Reasoning Tokens: Supported
Batch API: Unavailable
Same-Category 2026 Model Alternatives (Frontier Reasoning)
| Model | Provider | Input / Cached ($/1M) | Output ($/1M) | Context / Max Out |
|---|---|---|---|---|
| Kimi K3.1 Pro | Moonshot | $2 / $0.2 | $10 | 1,048,576 / 943,718 |
| Claude Fable 5.2 | Anthropic | $8 / $0.2 | $40 | 1,000,000 / 128,000 |
| GLM 5.3 FlashX Legal | Z.ai / GLM | $0.37 / $0.075 | $1.25 | 1,048,576 / 131,072 |
| GPT-6.1 Terra Pro | OpenAI | $1 / $0.05 | $5 | 1,050,000 / 128,000 |
| GPT-6.1 Sol Pro | OpenAI | $2 / $0.1 | $10 | 1,050,000 / 128,000 |
| Claude Sonnet 5.5 | Anthropic | $2 / $0.1 | $10 | 1,000,000 / 128,000 |
| GPT-6 Luna Pro | OpenAI | $0.1 / $0.01 | $0.5 | 1,050,000 / 128,000 |
Head-to-Head Matchups Featuring Kimi K3.1 Pro
- Kimi K3.1 Pro vs DeepSeek V4 Pro 0813 — $2 vs $0.111 / 1M
Frequently Asked Questions
How much does Kimi K3.1 Pro cost per 1 million tokens in 2026?
Kimi K3.1 Pro by Moonshot is billed at $2 per 1M uncached input tokens, $0.2 per 1M cached input read tokens (90% cache discount), and $10 per 1M output tokens.
What are the context window and max output token limits for Kimi K3.1 Pro?
Kimi K3.1 Pro supports a 1,048,576-token input context window and up to 943,718 completion output tokens per request, accepting text, image, video inputs.
Does Kimi K3.1 Pro support strict JSON Schema outputs, tool calling, and Batch API?
Kimi K3.1 Pro capability profile: tool calling = Supported, strict JSON Schema structured outputs = Supported, reasoning mode = Supported, and 50% asynchronous Batch API = Not listed.