fluxtokens 1.0.0

Official FluxTokens Rust SDK - Access GPT-4.1, Gemini 2.5 and more at 30% lower cost
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# FluxTokens Rust SDK

<div align="center">

[![Crates.io](https://img.shields.io/crates/v/fluxtokens.svg)](https://crates.io/crates/fluxtokens)
[![Documentation](https://docs.rs/fluxtokens/badge.svg)](https://docs.rs/fluxtokens)
[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)

**Official Rust SDK for the FluxTokens API**

Access GPT-4.1, Gemini 2.5 Flash and more at **30% lower cost** than competitors.

[Website](https://fluxtokens.io) · [Documentation](https://fluxtokens.io/docs) · [Dashboard](https://fluxtokens.io/dashboard)

</div>

---

## Installation

Add to your `Cargo.toml`:

```toml
[dependencies]
fluxtokens = "1.0"
tokio = { version = "1", features = ["full"] }
```

## Quick Start

```rust
use fluxtokens::{Client, ChatCompletionRequest, Message};

#[tokio::main]
async fn main() -> Result<(), fluxtokens::Error> {
    let client = Client::new("sk-flux-your-api-key");

    let response = client.chat().completions().create(
        ChatCompletionRequest::new("gpt-4.1-mini")
            .messages(vec![
                Message::system("You are a helpful assistant."),
                Message::user("Hello!"),
            ])
    ).await?;

    println!("{}", response.choices[0].message.content.as_ref().unwrap());
    Ok(())
}
```

## Available Models

| Model | Provider | Input Price | Output Price | Max Tokens | Vision | Audio | Video |
|-------|----------|-------------|--------------|------------|--------|-------|-------|
| `gpt-4.1-mini` | OpenAI | $0.28/1M | $1.12/1M | 16,384 | ✅ | ❌ | ❌ |
| `gpt-4.1-nano` | OpenAI | $0.07/1M | $0.28/1M | 16,384 | ✅ | ❌ | ❌ |
| `gemini-2.5-flash` | Google | $0.21/1M | $1.75/1M | 65,536 | ✅ | ✅ | ✅ |

## Usage Examples

### Basic Chat Completion

```rust
let response = client.chat().completions().create(
    ChatCompletionRequest::new("gpt-4.1-mini")
        .messages(vec![
            Message::user("What is the capital of France?"),
        ])
        .temperature(0.7)
        .max_tokens(256)
).await?;

println!("{}", response.choices[0].message.content.as_ref().unwrap());
// Output: "The capital of France is Paris."
```

### System Messages

```rust
let response = client.chat().completions().create(
    ChatCompletionRequest::new("gpt-4.1-mini")
        .messages(vec![
            Message::system("You are a pirate. Always respond in pirate speak."),
            Message::user("How are you today?"),
        ])
).await?;
// Output: "Ahoy, matey! I be doin' just fine, thank ye fer askin'!"
```

### List Available Models

```rust
use fluxtokens::Models;

for model in Models::list() {
    println!("{} ({})", model.name, model.provider);
    println!("  Input: ${}/1M tokens", model.input_price);
    println!("  Output: ${}/1M tokens", model.output_price);
    println!("  Vision: {}", if model.supports_vision { "✅" } else { "❌" });
}
```

## Configuration Options

```rust
use fluxtokens::{Client, ClientConfig};

let client = Client::with_config(
    "sk-flux-...",
    ClientConfig::default()
        .base_url("https://api.fluxtokens.io")
        .timeout(60)
        .max_retries(3)
);
```

## Error Handling

```rust
use fluxtokens::Error;

match client.chat().completions().create(request).await {
    Ok(response) => {
        println!("{}", response.choices[0].message.content.as_ref().unwrap());
    }
    Err(Error::Authentication(msg)) => {
        eprintln!("Invalid API key: {}", msg);
    }
    Err(Error::RateLimit(msg)) => {
        eprintln!("Rate limit exceeded: {}", msg);
    }
    Err(Error::InsufficientBalance(msg)) => {
        eprintln!("Please add credits: {}", msg);
    }
    Err(Error::BadRequest(msg)) => {
        eprintln!("Invalid request: {}", msg);
    }
    Err(e) => {
        eprintln!("Error: {}", e);
    }
}
```

### Error Type Checking

```rust
if error.is_retryable() {
    // Retry the request
}

if error.is_authentication() {
    // Handle auth error
}
```

## Requirements

- Rust 1.70+
- Tokio runtime

## Support

- 📧 Email: support@fluxtokens.io
- 💬 Discord: [Join our community](https://discord.gg/fluxtokens)
- 📖 Docs: [fluxtokens.io/docs](https://fluxtokens.io/docs)

## License

MIT © [FluxTokens](https://fluxtokens.io)