GPT-6 Astra vs Kimi K3 pricing
- For the Chatbot workload, Kimi K3 costs 3.3× less than GPT-6 Astra.
- For the RAG workload, Kimi K3 costs 3.3× less than GPT-6 Astra.
- For the Coding agent workload, Kimi K3 costs 3.3× less than GPT-6 Astra.
Prices
| USD per 1M tokens | GPT-6 Astra | Kimi K3 |
|---|---|---|
| Input | $10.00 | $3.00 |
| Output | $50.00 | $15.00 |
| Cache read | $1.00 | $0.30 |
| Cache write | $12.50 | $3.00 |
| Batch input | $5.00 | Not published |
| Batch output | $25.00 | Not published |
Verified against the provider's official pricing page on Oct 9, 2026. Official pricing page
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 | GPT-6 Astra | Kimi K3 |
|---|---|---|
| Chatbot1,000 in / 500 out tokens, 10,000 requests a day | $10,500/mo | $3,150/mo |
| RAG8,000 in / 500 out tokens, 5,000 requests a day | $15,750/mo | $4,725/mo |
| Coding agent50,000 in / 2,000 out tokens, 1,000 requests a day, 80% cached input | $7,200/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
| GPT-6 Astra | Kimi K3 | |
|---|---|---|
| Context | 1,050,000 tokens | 1,048,576 tokens |
| Max output | 128,000 tokens | 1,048,576 tokens |
| Input | text, image, pdf | text, image, video |
| Tool calling | Yes | Yes |
| Reasoning | Yes | Yes |
| Structured outputs | Yes | Yes |
Questions
- What is the price difference between GPT-6 Astra and Kimi K3?
- GPT-6 Astra: $10.00 per 1M input tokens and $50.00 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 $10,500 per month for GPT-6 Astra and $3,150 for Kimi K3.
- Which has the longer context window, GPT-6 Astra or Kimi K3?
- GPT-6 Astra has the longer context window: up to 1,050,000 tokens, compared with 1,048,576 for Kimi K3.
- Do GPT-6 Astra and Kimi K3 have prompt caching and batch prices?
- GPT-6 Astra: cached input $1.00 per 1M tokens; batch $5.00 per 1M input tokens and $25.00 per 1M output tokens. Kimi K3: cached input $0.30 per 1M tokens; no batch price published.