Anthropic's Claude model family — from the lightweight Haiku to the Claude Opus 5.5 API for the most complex tasks — known for safety, long context windows, and nuanced reasoning.
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claude-haiku-5-5
Transparent pricing with no hidden fees. Pay only for what you use.
Per 1M tokens
Up to 100,000 input tokens
| Rate | GoldCurrent price | Platinum | Diamond | Official | Your savings |
|---|---|---|---|---|---|
| Input | 0.8~$0.08 | 0.76~$0.076 | 0.72~$0.072 | 1~$0.1 | 20% |
| Cached input | 0.08~$0.008 | 0.076~$0.0076 | 0.072~$0.0072 | 0.1~$0.01 | 20% |
| Cache write (5 min) | 1~$0.1 | 0.95~$0.095 | 0.9~$0.09 | 1.25~$0.125 | 20% |
| Cache write (1 hr) | 1.6~$0.16 | 1.52~$0.152 | 1.44~$0.144 | 2~$0.2 | 20% |
| Output | 4~$0.4 | 3.8~$0.38 | 3.6~$0.36 | 5~$0.5 | 20% |
Over 100,000 input tokens
| Rate | GoldCurrent price | Platinum | Diamond | Official | Your savings |
|---|---|---|---|---|---|
| Input | 4~$0.4 | 3.8~$0.38 | 3.6~$0.36 | 5~$0.5 | 20% |
| Cached input | 0.4~$0.04 | 0.38~$0.038 | 0.36~$0.036 | 0.5~$0.05 | 20% |
| Cache write (5 min) | 5~$0.5 | 4.75~$0.475 | 4.5~$0.45 | 6.25~$0.625 | 20% |
| Cache write (1 hr) | 8~$0.8 | 7.6~$0.76 | 7.2~$0.72 | 10~$1 | 20% |
| Output | 20~$2 | 19~$1.9 | 18~$1.8 | 25~$2.5 | 20% |
Access the full Claude family including Sonnet, Opus, and Haiku. Industry-leading context windows, thoughtful reasoning, and built-in safety.
50K+
Active Users
99.9%
Uptime
2x
Faster
70%
Cost Savings
What makes Claude stand out among frontier AI models
How teams use Claude in production
Start using Anthropic's models in minutes
Create your free APIMart account and top up your balance.
Generate an API key to access Claude models programmatically.
Use the playground above or integrate via the Anthropic SDK.
What developers say about our Claude API
“Claude's 200K context window lets us process entire contracts in a single API call. No more chunking.”
Alex Chen
Legal Tech Engineer
“We switched from GPT to Claude for customer support — the responses are more nuanced and less likely to hallucinate.”
Sarah Jones
Support Lead
“Claude Opus 4.6 is the best coding assistant I've used. It understands large codebases remarkably well.”
Mike Brown
Senior Developer
“The thinking models are fantastic for research tasks. They show their work, which builds trust with our team.”
Emily Zhang
Research Scientist
“Haiku gives us GPT-4 level quality at a fraction of the cost for our chatbot use case.”
David Li
Startup Founder
“APIMart's Claude API is more affordable and just as reliable as going direct. Easy migration.”
Lisa Wang
Platform Engineer
Common questions about using the Claude API
We offer the latest Claude Opus 5.5, Claude Sonnet 5.5, and Claude Fable 5.1, plus Claude Opus 5, Sonnet 5, Fable 5, Opus 4.8/4.7/4.6, and Sonnet 4.6. Earlier models such as Claude Opus 4.5, Sonnet 4.5, Haiku 4.5, and thinking variants remain available.
Thinking variants (e.g. claude-opus-4-6-thinking) use extended reasoning to work through complex problems step by step before answering.
Pricing is token-based (input + output). Haiku is the most affordable, Sonnet is mid-range, and Opus is premium. See the pricing table above.
Yes. Our API is fully compatible with the Anthropic SDK. Simply change the base URL.
Yes. Your API data is not stored or used for training. All requests are encrypted.
Haiku 4.5 for fast, low-cost tasks. Sonnet 5.5 for a balance of speed and quality. Opus 5.5 for the most complex reasoning and analysis.
The Anthropic Claude API is billed per million input and output tokens. The pricing table on this page lists every available model, and the prices shown are Gold member rates (20% off). Platinum and Diamond members save even more, up to 28%, and you only pay for successful requests.
Sign up for APIMart, open the API Keys page in your dashboard, and create a key. The same key works for the Anthropic Claude API and every other model on the platform, with pay-as-you-go billing and no subscription.
No. There is no free quota for the Claude API on APIMart. Claude models are pay-as-you-go by input and output tokens, you only pay for successful requests, and members save 20%–28% on every price.
Create an APIMart API key, change the base URL in the Anthropic SDK to APIMart, and set model to the Claude model you need, such as Claude Opus 5.5 or Sonnet 5.5. Request parameters and code examples are in the APIMart docs (docs.apimart.ai).
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