Claude Sonnet 5.5 vs Kimi K3 pricing
- For the Chatbot workload, Claude Sonnet 5.5 costs 1.5× less than Kimi K3.
- For the RAG workload, Claude Sonnet 5.5 costs 1.5× less than Kimi K3.
- For the Coding agent workload, Claude Sonnet 5.5 costs 1.6× less than Kimi K3.
Prices
| USD per 1M tokens | Claude Sonnet 5.5 | Kimi K3 |
|---|---|---|
| Input | $2.00 | $3.00 |
| Output | $10.00 | $15.00 |
| Cache read | $0.10 | $0.30 |
| Cache write | $2.50 | $3.00 |
| Batch input | $1.00 | Not published |
| Batch output | $5.00 | 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 | Claude Sonnet 5.5 | Kimi K3 |
|---|---|---|
| Chatbot1,000 in / 500 out tokens, 10,000 requests a day | $2,100/mo | $3,150/mo |
| RAG8,000 in / 500 out tokens, 5,000 requests a day | $3,150/mo | $4,725/mo |
| Coding agent50,000 in / 2,000 out tokens, 1,000 requests a day, 80% cached input | $1,320/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
| Claude Sonnet 5.5 | Kimi K3 | |
|---|---|---|
| Context | 1,000,000 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 Claude Sonnet 5.5 and Kimi K3?
- Claude Sonnet 5.5: $2.00 per 1M input tokens and $10.00 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 $2,100 per month for Claude Sonnet 5.5 and $3,150 for Kimi K3.
- Which has the longer context window, Claude Sonnet 5.5 or Kimi K3?
- Kimi K3 has the longer context window: up to 1,048,576 tokens, compared with 1,000,000 for Claude Sonnet 5.5.
- Do Claude Sonnet 5.5 and Kimi K3 have prompt caching and batch prices?
- Claude Sonnet 5.5: cached input $0.10 per 1M tokens; batch $1.00 per 1M input tokens and $5.00 per 1M output tokens. Kimi K3: cached input $0.30 per 1M tokens; no batch price published.