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GLM-5.3-FlashX vs Kimi K3 pricing

Prices

GLM-5.3-FlashX and Kimi K3 prices, USD per 1M tokens
USD per 1M tokensGLM-5.3-FlashXKimi K3
Input$0.37$3.00
Output$1.25$15.00
Cache read$0.075$0.30
Cache writeFree$3.00
Batch inputNot publishedNot published
Batch outputNot publishedNot published

Z.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

WorkloadGLM-5.3-FlashXKimi K3
Chatbot1,000 in / 500 out tokens, 10,000 requests a day$298.50/mo$3,150/mo
RAG8,000 in / 500 out tokens, 5,000 requests a day$537.75/mo$4,725/mo
Coding agent50,000 in / 2,000 out tokens, 1,000 requests a day, 80% cached input$276.00/mo$2,160/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

GLM-5.3-FlashXKimi K3
Context1,000,000 tokens1,048,576 tokens
Max output131,072 tokens1,048,576 tokens
Inputtext, image, video, pdftext, image, video
Tool callingYesYes
ReasoningYesYes
Structured outputsYesYes

Questions

What is the price difference between GLM-5.3-FlashX and Kimi K3?
GLM-5.3-FlashX: $0.37 per 1M input tokens and $1.25 per 1M output tokens. Kimi K3: $3.00 per 1M input tokens and $15.00 per 1M output tokens. For the Chatbot workload (1,000 in / 500 out tokens, 10,000 requests a day), that is about $298.50 per month for GLM-5.3-FlashX and $3,150 for Kimi K3.
Which has the longer context window, GLM-5.3-FlashX or Kimi K3?
Kimi K3 has the longer context window: up to 1,048,576 tokens, compared with 1,000,000 for GLM-5.3-FlashX.
Do GLM-5.3-FlashX and Kimi K3 have prompt caching and batch prices?
GLM-5.3-FlashX: cached input $0.075 per 1M tokens; no batch price published. Kimi K3: cached input $0.30 per 1M tokens; no batch price published.

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