Claude Opus 5.5 vs Kimi K3 pricing
- For the Chatbot workload, Kimi K3 costs 1.3× less than Claude Opus 5.5.
- For the RAG workload, Kimi K3 costs 1.3× less than Claude Opus 5.5.
- For the Coding agent workload, Kimi K3 costs 1.2× less than Claude Opus 5.5.
Prices
| USD per 1M tokens | Claude Opus 5.5 | Kimi K3 |
|---|---|---|
| Input | $4.00 | $3.00 |
| Output | $20.00 | $15.00 |
| Cache read | $0.20 | $0.30 |
| Cache write | $5.00 | $3.00 |
| Batch input | $2.00 | Not published |
| Batch output | $10.00 | 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 Opus 5.5 | Kimi K3 |
|---|---|---|
| Chatbot1,000 in / 500 out tokens, 10,000 requests a day | $4,200/mo | $3,150/mo |
| RAG8,000 in / 500 out tokens, 5,000 requests a day | $6,300/mo | $4,725/mo |
| Coding agent50,000 in / 2,000 out tokens, 1,000 requests a day, 80% cached input | $2,640/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 Opus 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 Opus 5.5 and Kimi K3?
- Claude Opus 5.5: $4.00 per 1M input tokens and $20.00 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 $4,200 per month for Claude Opus 5.5 and $3,150 for Kimi K3.
- Which has the longer context window, Claude Opus 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 Opus 5.5.
- Do Claude Opus 5.5 and Kimi K3 have prompt caching and batch prices?
- Claude Opus 5.5: cached input $0.20 per 1M tokens; batch $2.00 per 1M input tokens and $10.00 per 1M output tokens. Kimi K3: cached input $0.30 per 1M tokens; no batch price published.