Kimi K2.5 is $2.6 cheaper per 1M input tokens (86.7% lower; 7.5x difference).
API cost decision in 10 seconds
Kimi K2.5 vs Sonar Pro Search
Pick Kimi K2.5 when budget and context both matter.
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Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick Kimi K2.5 when budget and context both matter.
On the standard 1M input plus 500K output workload, Kimi K2.5 is estimated at $1.35 vs $10.5 for Sonar Pro Search, saving $9.15 (87.1% lower).
Cost-first pickKimi K2.5
Context-first pickKimi K2.5
Sample savings$9.1587.1%
10x traffic gap$91.5
Kimi K2.5 is cheaper on the standard workload and also has the larger context window. At 10x that traffic, the same price gap is about $91.5. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Kimi K2.5 stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | Kimi K2.5 | Sonar Pro Search |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Kimi K2.5 | $2.95 | $22.5 |
| Balanced workload | 1M input + 1M output | Kimi K2.5 | $2.3 | $18 |
| Output-heavy chatbot | 1M input + 5M output | Kimi K2.5 | $9.9 | $78 |
Kimi K2.5 is $13.1 cheaper per 1M output tokens (87.3% lower; 7.89x difference).
Kimi K2.5 has 62.14K more context (1.31x larger).
Kimi K2.5 is $9.15 cheaper on the standard workload (87.1% 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
Kimi K2.5 has the lower input price; Kimi K2.5 has the lower output price; Kimi K2.5 offers the larger context window. For the 1M input plus 500K output sample, Kimi K2.5 is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $1.35 for Kimi K2.5 and $10.5 for Sonar Pro Search.
Choose Kimi K2.5 when you care most about lower input-token price, lower output-token price, and larger context window.
Choose Sonar Pro Search when its provider, model quality, latency, or availability is more important than the numeric price/context winner.
- On the standard 1M input plus 500K output workload, Kimi K2.5 is estimated at $1.35 vs $10.5 for Sonar Pro Search, saving $9.15 (87.1% lower).
- Kimi K2.5 is $9.15 cheaper on the standard workload (87.1% lower).
- Kimi K2.5 is $2.6 cheaper per 1M input tokens (86.7% lower; 7.5x difference).
- Kimi K2.5 is $13.1 cheaper per 1M output tokens (87.3% lower; 7.89x difference).
- Kimi K2.5 has 62.14K more context (1.31x larger).
| Feature | Kimi K2.5 (MoonshotAI) | Sonar Pro Search (Perplexity) |
|---|---|---|
| Input Price prompt tokens per 1M | $0.4 | $3 |
| Completion Price per 1M tokens | $1.9 | $15 |
| Sample Workload Cost 1M input + 500K output | $1.35 | $10.5 |
| Context Window | 262.14K | 200K |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Kimi K2.5 | On the standard 1M input plus 500K output workload, Kimi K2.5 is estimated at $1.35 vs $10.5 for Sonar Pro Search, saving $9.15 (87.1% lower). |
| High-volume input processing | Kimi K2.5 | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | Kimi K2.5 | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | Kimi K2.5 | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- Sonar can replace Sonar Pro Search when lower sample workload cost matters most: $1.5.
- Sonar Reasoning Pro can replace Sonar Pro Search when lower sample workload cost matters most: $6.
- Sonar Deep Research can replace Sonar Pro Search when lower sample workload cost matters most: $6.
- Llama 4 Scout offers 10M context with $0.23 sample workload cost.
- Grok 4.20 Multi-Agent offers 2M context with $5 sample workload cost.
- Grok 4.20 offers 2M context with $2.5 sample workload cost.
- GPT-5.4 offers 1.05M context with $10 sample workload cost.
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