State-of-the-art general intelligence, step-by-step reasoning, complete repo engineering, and autonomous multi-tool agent execution — built and hosted in India at a fraction of the cost of frontier models.
Building a product? View OpenAI API integration or claim 100M Free Startup Tokens.
Casturi is a general-purpose frontier LLM engineered for step-by-step reasoning, complex coding, tool synthesis, and enterprise-grade workloads.
Generation, refactoring, debugging, migration, and architecture review with entire codebase contexts — not just single functions.
Works through multi-constraint logic, quantitative modeling, and edge cases systematically before producing the output.
Invokes custom APIs, runs Python execution sandboxes, performs live web browsing, and recovers gracefully from unexpected schema returns.
Parses financial reports, complex spreadsheets, architectural diagrams, screenshots, and OCR documents directly into actionable insights.
Guaranteed schema adherence and deterministic JSON mode, ready to plug straight into high-frequency backend API pipelines.
Trained, fine-tuned, and served strictly on domestic Indian cloud infrastructure. Prompts never traverse foreign API endpoints.
Casturi is built and hosted on Indian infrastructure with a strict data boundary: nothing you send is ever used to train a public model, and nothing leaves the platform without your action.
Why spend \$20+ per million tokens on international frontier models? Casturi delivers 90%+ cost savings with sub-second response latency and full API compatibility.
Scale production API workloads and agent fleets without burning your runway.
Hook Casturi directly into your CI/CD pipelines to review code diffs, flag security vulnerabilities, and generate test suites automatically.
Deploy agentic assistants capable of browsing the web, calling external microservices, executing python scripts, and completing multi-step tasks.
Extract tabular data, invoices, tax filings, and complex technical diagrams into structured databases instantly at pennies per thousand pages.
Power real-time customer applications, chatbots, and recommendation engines with deterministic JSON output and guaranteed uptime.
Run Retrieval-Augmented Generation (RAG) over millions of internal documents with strict data privacy — no data ever leaves India.
Replace expensive API endpoints in high-volume workloads with Casturi's high-speed endpoint to reduce operational costs overnight.
Zero code refactoring needed. Simply update your base URL to https://api.casturi.ai/v1 and use your existing OpenAI SDKs, LangChain, LlamaIndex, or AutoGen applications.
/v1/chat/completions.from openai import OpenAI # Initialize Casturi OpenAI-compatible client client = OpenAI( base_url="https://api.casturi.ai/v1", api_key="sk-casturi-your-api-key" ) response = client.chat.completions.create( model="casturi-llm-v1", messages=[ {"role": "system", "content": "You are an expert AI engineer."}, {"role": "user", "content": "Optimize this microservice query"} ], temperature=0.2, stream=True ) for chunk in response: print(chunk.choices[0].delta.content or "", end="")
import OpenAI from 'openai'; const openai = new OpenAI({ baseURL: 'https://api.casturi.ai/v1', apiKey: process.env.CASTURI_API_KEY, }); async function main() { const completion = await openai.chat.completions.create({ model: 'casturi-llm-v1', messages: [{ role: 'user', content: 'Generate a React modal component' }], temperature: 0.3, }); console.log(completion.choices[0].message.content); } main();
curl https://api.casturi.ai/v1/chat/completions \ -H "Content-Type: application/json" \ -H "Authorization: Bearer sk-casturi-your-api-key" \ -d '{ "model": "casturi-llm-v1", "messages": [ {"role": "user", "content": "Explain async context managers in Python"} ], "temperature": 0.2 }'
package main import ( "context" "fmt" "github.com/sashabaranov/go-openai" ) func main() { config := openai.DefaultConfig("sk-casturi-your-api-key") config.BaseURL = "https://api.casturi.ai/v1" client := openai.NewClientWithConfig(config) resp, _ := client.CreateChatCompletion(context.Background(), openai.ChatCompletionRequest{ Model: "casturi-llm-v1", Messages: []openai.ChatCompletionMessage{{Role: "user", Content: "Hello Casturi!"}}, }) fmt.Println(resp.Choices[0].Message.Content) }
Casturi Studio is the agent workspace behind the chat window — define a system prompt, wire up tools, and hand it a job. No separate product to learn.
Reads a diff, runs it against your test suite in a sandbox, and flags security issues before merge — invoked from any chat, or wired into a workflow.
Start from a curated set — code review, research, SQL, support triage — instead of writing a system prompt from scratch.
Give an agent a name, instructions, and a toolset — code execution, file search, custom actions — and it's ready to use in any conversation.
Publish an agent for your team or pull one someone else on Casturi already built — no redeploy required.
Building the next big AI app or launching a new product in India? We are granting 100,000,000 free tokens to eligible startups, along with 1-on-1 technical support and high rate limits.
Worth ₹1,50,000+ in API credits to build, test, and launch your prototype with zero overhead.
No code changes required. Connect your existing codebase in 60 seconds.
Direct engineering channel on WhatsApp/Slack with Casturi LLM core team.
Explore the Casturi web application — built with intuitive agent tools, multi-model selectors, code artifact execution, and seamless dark & light themes.
Full conversation history, code execution status, syntax highlighting, and responsive agent selector.
Manage custom agents, track token usage, generate API keys, and monitor active startup grants.
The preview is invite-only, so every account starts on Free. Upgrades are granted by the Casturi team — no payment step required during preview.
For trying Casturi LLM and testing features.
₹0 / month
For daily engineering and API access.
Granted during preview
For startups and enterprise teams.
100M Grant / Free
Casturi API is 100% OpenAI compatible. Simply pass base_url="https://api.casturi.ai/v1" into your OpenAI SDK instance and use your Casturi API key. Your code will run without any syntax or logic changes.
Fill out the Request Access form below and select "Startup Program Grant" or mention your product details. Our engineering team reviews requests and grants 100M free tokens within 24 hours.
Casturi is optimized specifically for high-efficiency inference hosted directly in Indian datacenter infrastructure, eliminating expensive international routing and overhead.
Yes. Prompts and API requests are processed strictly on domestic Indian servers. Your data is never shared with third parties or used for external model training.
Casturi supports live web browsing, sandboxed Python execution, multi-step tool calling, file analysis, and agent marketplace deployment.
Join the preview list or apply for the 100M Free Startup Token Grant. We process access requests daily.