Claude Sonnet 4.5 vs Sonar Deep Research: API Cost Comparison
Compare the API pricing, context windows, features, and real-world cost projections for Claude Sonnet 4.5 (Anthropic) and Sonar Deep Research (Perplexity). Use the interactive calculator below to compute your exact monthly cost based on your token usage and request volume.
Prices verified Mar 24, 2026
Interactive Cost Calculator
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Showing costs for 2 models. Cheapest: Sonar Deep Research at $60.00/month.
| Alert | |||||||
|---|---|---|---|---|---|---|---|
BestSonar Deep Research | Perplexity | $60.00 | $0.006000 | $20.00 | $40.00 | 42.9% | Alerts coming soon |
Claude Sonnet 4.5 | Anthropic | $105.00 | $0.010500 | $30.00 | $75.00 | — | Alerts coming soon |
Monthly Cost Comparison
Price Comparison at a Glance
All prices are in USD per 1 million tokens ($/M tokens). Lower is cheaper.
| Pricing Type | Claude Sonnet 4.5 | Sonar Deep Research | Cheaper |
|---|---|---|---|
| Input (standard) | $3.00/M | $2.00/M | Sonar Deep Research |
| Output | $15.00/M | $8.00/M | Sonar Deep Research |
| Cached input | $0.30/M | N/A | — |
| Batch input | $1.50/M | N/A | — |
| Batch output | $7.50/M | N/A | — |
Prices last verified: 2026-03-10 – 2026-03-24
Cost Breakdown by Usage Volume
Estimated monthly costs at different request volumes, assuming 1,000 input tokens and 500 output tokens per request. Adjust in the calculator above for your specific use case.
| Volume | Claude Sonnet 4.5Monthly | Sonar Deep ResearchMonthly | Claude Sonnet 4.5Per request | Sonar Deep ResearchPer request |
|---|---|---|---|---|
| 1K requests/mo | $10.50 | $6.00 | $0.010500 | $0.006000 |
| 10K requests/mo | $105.00 | $60.00 | $0.010500 | $0.006000 |
| 100K requests/mo | $1,050.00 | $600.00 | $0.010500 | $0.006000 |
| 1M requests/mo | $10,500.00 | $6,000.00 | $0.010500 | $0.006000 |
Green values indicate the lower-cost option at each volume tier. Cost per request is calculated at 1,000 input + 500 output tokens using standard (non-batch, non-cached) pricing.
Price History
Input price per 1M tokensWhen to Choose Claude Sonnet 4.5
by Anthropic
- Code generation
- Content & copywriting
- RAG / Semantic search
Input / 1M tokens
$3.00/M
Output / 1M tokens
$15.00/M
Context window
200,000
Tier
mid
When to Choose Sonar Deep Research
by Perplexity
- RAG / Semantic search
- Document summarization
Input / 1M tokens
$2.00/M
Output / 1M tokens
$8.00/M
Context window
127,072
Tier
reasoning
Key Differences Beyond Price
Cost is only one factor in choosing an AI model. Context window size, rate limits, supported features, and latency all affect whether a model fits your use case.
| Capability | Claude Sonnet 4.5 | Sonar Deep Research |
|---|---|---|
| Context window | 200,000 tokens | 127,072 tokens |
| Max output tokens | 64,000 tokens | 8,192 tokens |
| Performance tier | Mid | Reasoning |
| Vision / image input | Yes | No |
| Function calling | Yes | No |
| JSON mode | Yes | No |
| Prompt caching | Yes | No |
| Batch API (50% discount) | Yes | No |
| Extended reasoning | Yes | Yes |
| Fine-tuning | No | No |
| Rate limit (req/min) | 4,000 | Not published |
Claude Sonnet 4.5 notes
Extended thinking mode available. Strong coding benchmark scores.
Sonar Deep Research notes
Additional fees: $2/1M citation tokens, $3/1M reasoning tokens, $5 per 1,000 search queries. Designed for exhaustive research tasks.
Frequently Asked Questions
Is Claude Sonnet 4.5 cheaper than Sonar Deep Research?
At standard usage (1,000 input tokens, 500 output tokens, 100,000 requests/month), Sonar Deep Research costs $600.00/month versus $1,050.00/month for Claude Sonnet 4.5 — a 43% saving. Your actual savings will vary based on your token profile; output-heavy workloads amplify differences in output pricing.
Which model has a larger context window, Claude Sonnet 4.5 or Sonar Deep Research?
Claude Sonnet 4.5 has a larger context window at 200,000 tokens, compared to 127,072 tokens for Sonar Deep Research. A larger context window is important for processing long documents, multi-turn conversations, or large codebases without truncation.
Do Claude Sonnet 4.5 and Sonar Deep Research support the Batch API?
Claude Sonnet 4.5 supports the Batch API (50% discount for async processing), while Sonar Deep Research does not. If your workload tolerates up to 24-hour latency, routing to Claude Sonnet 4.5 with batch pricing could significantly cut costs versus Sonar Deep Research's standard rate.
Which model offers better prompt caching?
Claude Sonnet 4.5 supports prompt caching at $0.30/M for cached input, while Sonar Deep Research does not offer prompt caching. For RAG applications or chatbots with large, repeated context, Claude Sonnet 4.5's caching capability can substantially reduce effective costs.
What are the best use cases for Claude Sonnet 4.5 vs Sonar Deep Research?
Both models are well-suited for RAG / Semantic search. Claude Sonnet 4.5 is particularly strong for Code generation, Content & copywriting. Sonar Deep Research is favored for Document summarization. At the same quality level, the lower-cost model is usually preferable; use this page's calculator to compare total monthly spend at your volume.
What is the cost per request for Claude Sonnet 4.5 vs Sonar Deep Research?
At 1,000 input tokens and 500 output tokens per request — a typical conversational workload — Claude Sonnet 4.5 costs $0.010500 per request and Sonar Deep Research costs $0.006000 per request. At 100,000 requests/month, that translates to $1,050.00 and $600.00 respectively. Use the interactive calculator to adjust these parameters for your actual workload.
Claude Sonnet 4.5 vs Sonar Deep Research: Summary
When comparing Claude Sonnet 4.5 and Sonar Deep Research for API cost, the right choice depends on your workload's token profile, required features, and tolerance for latency. Sonar Deep Research offers lower total cost at standard usage volumes (1,000 input + 500 output tokens per request at 100,000 requests/month) at $600.00/month, compared to $1,050.00/month for Claude Sonnet 4.5.
Both models are priced in USD per million tokens, the standard unit across all major AI API providers. Claude Sonnet 4.5 charges $3.00/M for input tokens and $15.00/M for output tokens. Sonar Deep Research charges $2.00/M input and $8.00/M output. If your workload is output-heavy (more tokens generated than consumed as input), the model with the lower output price compounds cost savings significantly at scale.
Prompt caching is supported by Claude Sonnet 4.5 but not Sonar Deep Research. For workloads with large, repeated system prompts or document context — such as RAG pipelines or multi-turn conversations with a fixed knowledge base — prompt caching can reduce effective input costs by 60–90%, which may change the cost ranking between these two models at your specific usage pattern.
Context window capacity differs between the two: Claude Sonnet 4.5 supports up to 200,000 tokens in a single request, versus 127,072 tokens for Sonar Deep Research. A larger context window is essential for document summarization, large codebase analysis, and multi-document retrieval-augmented generation (RAG) applications.
Use the interactive calculator at the top of this page to enter your actual token usage and monthly request volume for a precise cost comparison tailored to your workload. Adjust for batch API discounts and prompt caching to find the most cost-effective option for your specific deployment.
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