Sonar Pro Search is $2 cheaper per 1M input tokens (40% lower; 1.67x difference).
API cost decision in 10 seconds
Claude Opus 4.5 vs Sonar Pro Search
Pick Sonar Pro Search when budget is the priority.
Pricing data updated:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick Sonar Pro Search when budget is the priority.
On the standard 1M input plus 500K output workload, Sonar Pro Search is estimated at $10.5 vs $17.5 for Claude Opus 4.5, saving $7 (40% lower).
Cost-first pickSonar Pro Search
Context-first pickBoth models
Sample savings$740%
10x traffic gap$70
The reported context window is tied, so cost and provider fit carry more weight. At 10x that traffic, the same price gap is about $70. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Sonar Pro Search stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | Claude Opus 4.5 | Sonar Pro Search |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Sonar Pro Search | $37.5 | $22.5 |
| Balanced workload | 1M input + 1M output | Sonar Pro Search | $30 | $18 |
| Output-heavy chatbot | 1M input + 5M output | Sonar Pro Search | $130 | $78 |
Sonar Pro Search is $10 cheaper per 1M output tokens (40% lower; 1.67x difference).
Both models report the same context window at 200K tokens.
Sonar Pro Search is $7 cheaper on the standard workload (40% 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
Sonar Pro Search has the lower input price; Sonar Pro Search has the lower output price; both models report the same context window. For the 1M input plus 500K output sample, Sonar Pro Search is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $17.5 for Claude Opus 4.5 and $10.5 for Sonar Pro Search.
Choose Claude Opus 4.5 when its provider, model quality, latency, or availability is more important than the numeric price/context winner.
Choose Sonar Pro Search when you care most about lower input-token price, and lower output-token price.
- On the standard 1M input plus 500K output workload, Sonar Pro Search is estimated at $10.5 vs $17.5 for Claude Opus 4.5, saving $7 (40% lower).
- Sonar Pro Search is $7 cheaper on the standard workload (40% lower).
- Sonar Pro Search is $2 cheaper per 1M input tokens (40% lower; 1.67x difference).
- Sonar Pro Search is $10 cheaper per 1M output tokens (40% lower; 1.67x difference).
- Both models report the same context window at 200K tokens.
| Feature | Claude Opus 4.5 (Anthropic) | Sonar Pro Search (Perplexity) |
|---|---|---|
| Input Price prompt tokens per 1M | $5 | $3 |
| Completion Price per 1M tokens | $25 | $15 |
| Sample Workload Cost 1M input + 500K output | $17.5 | $10.5 |
| Context Window | 200K | 200K |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Sonar Pro Search | On the standard 1M input plus 500K output workload, Sonar Pro Search is estimated at $10.5 vs $17.5 for Claude Opus 4.5, saving $7 (40% lower). |
| High-volume input processing | Sonar Pro Search | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | Sonar Pro Search | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | Tie | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- Claude 3 Haiku can replace Claude Opus 4.5 when lower sample workload cost matters most: $0.88.
- Claude 3.5 Haiku can replace Claude Opus 4.5 when lower sample workload cost matters most: $2.8.
- Anthropic Claude Haiku Latest can replace Claude Opus 4.5 when lower sample workload cost matters most: $3.5.
- Claude Haiku 4.5 can replace Claude Opus 4.5 when lower sample workload cost matters most: $3.5.
- 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.
- OpenAI GPT Latest offers 1.05M context with $20 sample workload cost.
- No popular competitor is currently available.
Cheaper alternatives
Review low-cost models sorted by a standard 1M input plus 500K output workload.
Open cheapest modelsLarger context alternatives
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Open provider hubsAnthropic catalog
Review all tracked Anthropic models before deciding whether this matchup is the right shortlist.
Open Anthropic modelsPerplexity catalog
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