Kimi K3 Fast
Kimi K3 Fast is Moonshot AI (Kimi)'s language model with a 1.0M context window and up to 131K output tokens, starting at $4.50 / 1M input and $22.50 / 1M output. A fast-inference variant of Kimi K3 supporting long-horizon coding, reasoning, and knowledge work with a 1M-token context window.
| Specifications | |
|---|---|
moonshot-kimi-k3-fast | |
| Language | |
| Active | |
| Moonshot AI (Kimi) | |
| 1.0M tokens | |
| 131K tokens | |
| ImagePDF | |
| Text | |
| default | |
| · 16 days ago | |
Capabilities
Input2/5
Text·
Image✓
Audio·
Video·
PDF✓
Output1/5
Text✓
Image·
Audio·
Video·
Embedding·
Capabilities3/13
Reasoning✓
Adaptive Reasoning·
Function Calling✓
Parallel Function Calling·
Structured Outputs·
Native JSON Schema·
Web Search·
URL Context·
Computer Use·
Code Execution·
File Search·
Prompt Caching✓
Assistant Prefill·
Pricing by Provider
US Dollar ($)
Per 1M tokens
| Provider | Standard | ||
|---|---|---|---|
| Input $ / 1M | Output $ / 1M | Cache Read $ / 1M | |
| $4.50 | $22.50 | $0.45 | |
Cost Calculator
US Dollar ($)
Preset:
Versions
| Version | Released | Context | Input / 1M | Output / 1M | Status |
|---|---|---|---|---|---|
| Kimi K3 Fast | 1.0M | $4.50 | $22.50 | Current | |
| Kimi K3 | 1.0M | $3.00 | $15.00 | Available | |
| Kimi K2.7 Code High Speed | 262K | $1.90 | $8.00 | Available | |
| Kimi K2.7 Code | 262K | $0.475 | $2.00 | Available | |
| Kimi K2 Thinking Turbo | 262K | $1.15 | $8.00 | Deprecated | |
| Kimi K2 Turbo | 256K | — | — | Available | |
| Kimi K2.5 Non-Reasoning | — | — | — | — | Available |
| Kimi K2 Instruct V0 | — | — | — | — | Available |
| Kimi K2 Preview | — | 262K | $0.600 | $2.50 | Deprecated |
| Kimi K2 Turbo Preview | — | 262K | $1.15 | $8.00 | Deprecated |
| Kimi K2.5 Thinking | — | — | $0.600 | $3.00 | Available |