SBD4.5

SBD4.5 is a 3 billion parameter language model designed primarily for coding assistance and general conversation.

The model is intended to help with code generation, code explanation, debugging, technical questions, and natural-language chat.

SBD4.5 is an independently developed model and is not presented as a fine-tune of another released base model.

Model Details

Property	Value
Model	SBD4.5
Parameters	~3B
Architecture	Decoder-only / autoregressive language model
Base model	None
Primary purpose	Coding + Chat
Primary language	English
License	Apache License 2.0
Status	Experimental
Tokenizer	BPE
Training dataset	Convence/Rust-Coder

Training Data

SBD4.5 uses data from:

Convence/Rust-Coder

https://huggingface.co/datasets/Convence/Rust-Coder

The dataset provides programming-oriented training data with a particular emphasis on Rust and software-development tasks.

Additional datasets or training sources should be documented here if they are used in future versions of SBD4.5.

Tokenizer

SBD4.5 uses a Byte-Pair Encoding (BPE) tokenizer.

The tokenizer includes tokens intended for conversational formatting, including:

<|im_start|>
<|im_end|>
<|endoftext|>

It also includes Fill-in-the-Middle tokens useful for coding workflows:

<|fim_prefix|>
<|fim_middle|>
<|fim_suffix|>
<|fim_pad|>

This allows the tokenizer to represent both normal conversational text and code-oriented completion patterns.

Intended Uses

SBD4.5 is designed for:

• General conversation
• Programming assistance
• Code generation
• Code completion
• Code explanation
• Debugging assistance
• Rust programming
• Software-development questions
• Technical explanations
• Refactoring suggestions
• Generating scripts and utilities
• Explaining errors and stack traces
• Fill-in-the-Middle code completion

Coding Capabilities

SBD4.5 is primarily intended as a coding-oriented model.

Its training data places particular emphasis on Rust, although the tokenizer and model may support other programming languages depending on the model's broader training data.

Potential use cases include:

fn main() {
    println!("Hello from SBD4.5!");
}

as well as explaining, debugging, or modifying existing programs.

Example

User

Write a Rust function that determines whether a number is prime.

Assistant

fn is_prime(n: u64) -> bool {
    if n < 2 {
        return false;
    }

    let limit = (n as f64).sqrt() as u64;

    for i in 2..=limit {
        if n % i == 0 {
            return false;
        }
    }

    true
}

Chat Usage

SBD4.5 can also be used as a conversational assistant.

Example:

User: What is ownership in Rust?

Assistant: Ownership is Rust's system for managing memory without requiring
a garbage collector. Every value has an owner, and when that owner goes out
of scope, the value is automatically dropped.

Strengths

SBD4.5 is intended to perform well on tasks involving:

• Programming
• Rust code
• Code completion
• Code explanation
• Technical Q&A
• Debugging
• Conversational assistance
• Software-development workflows

Limitations

SBD4.5 can generate incorrect or misleading output.

In particular, the model may:

• Generate code that does not compile.
• Produce logical bugs.
• Suggest insecure implementations.
• Hallucinate libraries, APIs, functions, or configuration options.
• Misunderstand complex requirements.
• Generate outdated technical information.
• Produce confident answers that are incorrect.
• Perform unevenly across programming languages.

All generated code should be reviewed and tested before being used in production.

Security-sensitive code should receive additional manual review.

Safety

SBD4.5 is an experimental language model.

Generated responses should not automatically be treated as factual or safe to execute.

Users should carefully inspect generated commands and programs, particularly when they involve:

• File deletion
• System administration
• Network access
• Authentication
• Credentials
• Databases
• Production infrastructure
• Security-sensitive applications

Training

Model Size

SBD4.5 contains approximately:

3 billion parameters

Training Dataset

Primary documented dataset:

Convence/Rust-Coder

Dataset page:

https://huggingface.co/datasets/Convence/Rust-Coder

Training Method

SBD4.5 is trained as an independent model rather than being distributed as a fine-tuned checkpoint of another base model.

Additional information about:

• Optimizer
• Learning rate
• Batch size
• Sequence length
• Number of training tokens
• Hardware
• Training duration
• Training framework

can be added once those details are finalized.

Evaluation

Formal benchmark results are not currently published.

Future evaluations may include:

Coding

• HumanEval
• HumanEval+
• MBPP
• MultiPL-E
• Rust-specific coding benchmarks

General Ability

• Instruction following
• Reasoning
• General knowledge
• Conversational quality

Reliability

• Compilation success rate
• Unit-test pass rate
• Hallucination rate
• Security evaluation

Benchmark results should be reported here when available rather than inferred from parameter count or training data.

License

SBD4.5 is released under the Apache License 2.0.

Users should also review the licenses and terms associated with any datasets used during training.

Version

SBD4.5

• Approximately 3B parameters
• Coding + conversational model
• Rust-oriented training data
• BPE tokenizer
• Fill-in-the-Middle token support
• Apache-2.0 license

Disclaimer

SBD4.5 is an experimental AI model.

Generated information and code may be inaccurate, unsafe, incomplete, or inappropriate for a particular application.

Always review and test important outputs before relying on them.