Claude Opus 5 (batch) is $0.5 cheaper per 1M input tokens (16.7% lower; 1.2x difference).
API cost decision in 10 seconds
🔥Kimi K3 vs Claude Opus 5 (batch)
Pick Claude Opus 5 (batch) for lower cost; pick Kimi K3 only if the larger context window matters more.
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Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick Claude Opus 5 (batch) for lower cost; pick Kimi K3 only if the larger context window matters more.
On the standard 1M input plus 500K output workload, Claude Opus 5 (batch) is estimated at $8.75 vs $10.5 for Kimi K3, saving $1.75 (16.7% lower).
Cost-first pickClaude Opus 5 (batch)
Context-first pickKimi K3
Sample savings$1.7516.7%
10x traffic gap$17.5
Kimi K3 has more context, but Claude Opus 5 (batch) saves $1.75 on the standard workload. At 10x that traffic, the same price gap is about $17.5. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Claude Opus 5 (batch) stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | Kimi K3 | Claude Opus 5 (batch) |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Claude Opus 5 (batch) | $22.5 | $18.75 |
| Balanced workload | 1M input + 1M output | Claude Opus 5 (batch) | $18 | $15 |
| Output-heavy chatbot | 1M input + 5M output | Claude Opus 5 (batch) | $78 | $65 |
Claude Opus 5 (batch) is $2.5 cheaper per 1M output tokens (16.7% lower; 1.2x difference).
Kimi K3 has 48.58K more context (1.05x larger).
Claude Opus 5 (batch) is $1.75 cheaper on the standard workload (16.7% lower).
Estimate your workload cost
Your Workload Cost
This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.
Quick Decision
Claude Opus 5 (batch) has the lower input price; Claude Opus 5 (batch) has the lower output price; Kimi K3 offers the larger context window. For the 1M input plus 500K output sample, Claude Opus 5 (batch) is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $10.5 for Kimi K3 and $8.75 for Claude Opus 5 (batch).
Choose Kimi K3 when you care most about larger context window.
Choose Claude Opus 5 (batch) when you care most about lower input-token price, and lower output-token price.
- On the standard 1M input plus 500K output workload, Claude Opus 5 (batch) is estimated at $8.75 vs $10.5 for Kimi K3, saving $1.75 (16.7% lower).
- Claude Opus 5 (batch) is $1.75 cheaper on the standard workload (16.7% lower).
- Claude Opus 5 (batch) is $0.5 cheaper per 1M input tokens (16.7% lower; 1.2x difference).
- Claude Opus 5 (batch) is $2.5 cheaper per 1M output tokens (16.7% lower; 1.2x difference).
- Kimi K3 has 48.58K more context (1.05x larger).
| Feature | 🔥Kimi K3 (MoonshotAI) | Claude Opus 5 (batch) (Anthropic) |
|---|---|---|
| Input Price prompt tokens per 1M | $3 | $2.5 |
| Completion Price per 1M tokens | $15 | $12.5 |
| Sample Workload Cost 1M input + 500K output | $10.5 | $8.75 |
| Context Window | 1.05M | 1M |
| Release Date | ||
| Popularity | #14 |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Claude Opus 5 (batch) | On the standard 1M input plus 500K output workload, Claude Opus 5 (batch) is estimated at $8.75 vs $10.5 for Kimi K3, saving $1.75 (16.7% lower). |
| High-volume input processing | Claude Opus 5 (batch) | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | Claude Opus 5 (batch) | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | Kimi K3 | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- Kimi K2.7 Code (free) can replace Kimi K3 when lower sample workload cost matters most: $0.
- Kimi K2.6 (free) can replace Kimi K3 when lower sample workload cost matters most: $0.
- Kimi K2.5 can replace Kimi K3 when lower sample workload cost matters most: $1.57.
- Kimi K2 0711 can replace Kimi K3 when lower sample workload cost matters most: $1.72.
- Grok 4.20 Multi-Agent offers 2M context with $2.5 sample workload cost.
- Grok 4.20 offers 2M context with $2.5 sample workload cost.
- DeepSeek V4 Flash 0731 offers 1.31M context with $0.17 sample workload cost.
- DeepSeek V4 Flash Latest offers 1.31M context with $0.11 sample workload cost.
- DeepSeek V4 Flash 0731 · DeepSeek · #1
- MiMo-V2.5 · Xiaomi · #2
- Hy3 · Tencent · #3
- Ox Alpha · stealth · #4
Cheaper alternatives
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