Claude Sonnet 5.5 API Pricing
Anthropic · Mid-tier · Proprietary · released 2026-09. Prices in USD per 1 million tokens. Data snapshot: 2026-09-29.
Claude Sonnet 5.5 has held the same list price since 2026-09-29 and is the 92nd cheapest of 109 Mid-tier models. None of its 5 hosts undercuts the price quoted here. No Arena score is published for it, so it carries no Efficiency score and cannot hold the FinOps Friendly badge.
- Input: $2.00 per 1M tokens
- Output: $10.00 per 1M tokens
- Batch API (input/output): $1.00 / $5.00
- Prompt-cache read: $0.20
- Context window: 1M
Claude Sonnet 5.5 market position
On blended price ($7.60 per 1M tokens at 30% input, 70% output) it is cheaper than 13% of Mid-tier models: 92nd cheapest of 109, tied with 3 others. Across every category it is cheaper than 16% of priced text models in the catalogue: 235th cheapest of 283, tied with 3 others.
Claude Sonnet 5.5 licence, size and capabilities
Claude Sonnet 5.5 is recorded here as proprietary: access is through an API, priced by the token. Its parameter count is not published. Listed capabilities: Text, Vision, Reasoning, Code, Agents. Filling its 1M context window once costs $2.00 in input tokens at list price.
Monthly cost at 100K requests, by business use case
From the after-discounts figure (prompt caching on the cached input share, batch API for async workloads, only where the provider publishes those rates), which assumes you implement both, to the list price. One figure means no discount is published.
| Use case | Tokens (in/out) | Monthly (after discounts – list) |
|---|---|---|
| Support Ticket | 1,500 / 500 | $647 – $800 |
| Knowledge Q&A | 2,000 / 800 | $962 – $1.2K |
| Meeting Summary | 10,000 / 1,200 | $1.6K – $3.2K |
| Marketing Content | 2,500 / 1,800 | $2.2K – $2.3K |
| Coding Task | 3,000 / 2,000 | $2.3K – $2.6K |
| Invoice Processing | 1,500 / 600 | $427 – $900 |
| Call Summary | 2,000 / 700 | $540 – $1.1K |
| Agent Workflow | 6,000 / 3,000 | $3.5K – $4.2K |
Claude Sonnet 5.5 pricing by host
A host is a company that runs the model and sells it by the token — the lab that made it, a cloud platform like Amazon Bedrock, Azure or Vertex, or an independent provider. One model, several sellers, and often several prices. This model is sold by 5 different hosts. The price quoted above is the one we publish so that models stay comparable; it is not necessarily the cheapest way to buy this model. List prices as published on 2026-09-29 via OpenRouter — negotiated rates, committed-use discounts and provisioned capacity are not shown.
The price we publish is already the cheapest of the 5 hosts: Google at $2.00 input / $10.00 output per 1M tokens. All of them charge within 10% of one another.
| Host | Input $/1M | Output $/1M |
|---|---|---|
| Google (the price shown above) | $2.00 | $10.00 |
| Amazon Bedrock (the price shown above) | $2.00 | $10.00 |
| Azure (the price shown above) | $2.00 | $10.00 |
| Claude Platform on AWS (the price shown above) | $2.00 | $10.00 |
| Anthropic (the price shown above) | $2.00 | $10.00 |
Claude Sonnet 5.5 price history
Claude Sonnet 5.5 entered our daily price archive on 2026-09-29, 2026-08-15 being the first day we tracked any model. It listed at $2.00 input / $10.00 output per 1M tokens that day. No list price change since 2026-09-29. Last checked against the 2026-09-29 snapshot.
Alternatives to Claude Sonnet 5.5
- Next cheaper Mid-tier model: MiMo-V2.6-Pro-UltraSpeed (Xiaomi) at $7.39 blended, 3% less.
- Next more expensive: Command A (Cohere) at $7.75 blended, 2% more.
Common questions about Claude Sonnet 5.5 pricing
- How much does Claude Sonnet 5.5 cost?
- Claude Sonnet 5.5 costs $2.00 per million input tokens and $10.00 per million output tokens on the API.
- Does Claude Sonnet 5.5 offer batch or cached pricing?
- Yes. Batch API pricing is $1.00/M input and $5.00/M output. Prompt-cache reads cost $0.20/M.
- What would Claude Sonnet 5.5 cost per month?
- For a support-ticket workload (1,500 input + 500 output tokens per request) at 100K requests/month, Claude Sonnet 5.5 costs about $800 at list prices.
- Has the price of Claude Sonnet 5.5 changed?
- Claude Sonnet 5.5 entered our daily price archive on 2026-09-29, 2026-08-15 being the first day we tracked any model. It listed at $2.00 input / $10.00 output per 1M tokens that day. No list price change since 2026-09-29. Last checked against the 2026-09-29 snapshot.
These are list prices: real cost also depends on caching, batching, negotiated discounts, marketplace agreements, and existing contracts. Get a FinOps review from OptimNow or compare all models.
Build the business case for Claude Sonnet 5.5 in the AI ROI Calculator: add your business value on top of these costs to get ROI, break-even and payback.
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