Moonshot AI's list price for its own API, as compiled by models.dev and checked Oct 10, 2026, 09:00 UTC. Prices on cloud platforms and resellers can differ. Provider documentation
Monthly cost by workload
Workload
Kimi K3
Muse Spark 1.3
Chatbot1,000 in / 500 out tokens, 10,000 requests a day
$3,150/mo
$1,013/mo
RAG8,000 in / 500 out tokens, 5,000 requests a day
$4,725/mo
$1,819/mo
Coding agent50,000 in / 2,000 out tokens, 1,000 requests a day, 80% cached input
$2,160/mo
$810.00/mo
Cost = input tokens × input price + output tokens × output price, 30 days a month. Cached input uses the cache read price. Cache write fees are not included.
Context and capabilities
Kimi K3
Muse Spark 1.3
Context
1,048,576 tokens
1,048,576 tokens
Max output
1,048,576 tokens
131,072 tokens
Input
text, image, video
text, image, video, pdf, audio
Tool calling
Yes
Yes
Reasoning
Yes
Yes
Structured outputs
Yes
Yes
Questions
What is the price difference between Kimi K3 and Muse Spark 1.3?
Kimi K3: $3.00 per 1M input tokens and $15.00 per 1M output tokens. Muse Spark 1.3: $1.25 per 1M input tokens and $4.25 per 1M output tokens. For the Chatbot workload (1,000 in / 500 out tokens, 10,000 requests a day), that is about $3,150 per month for Kimi K3 and $1,013 for Muse Spark 1.3.
Which has the longer context window, Kimi K3 or Muse Spark 1.3?
Both accept up to 1,048,576 tokens of context.
Do Kimi K3 and Muse Spark 1.3 have prompt caching and batch prices?
Kimi K3: cached input $0.30 per 1M tokens; no batch price published. Muse Spark 1.3: cached input $0.15 per 1M tokens; no batch price published.