openai-api-rs

Library Listed

OpenAI API client library for Rust (unofficial)

Checked · Sources

Downloads
46,400
Dependents
33
Stars
485
Forks
93
Contributors
33
Commits
409
Latest release
10.0.2 ·

About

From the project README ·

OpenAI API client library for Rust (unofficial)

The OpenAI API client Rust library provides convenient access to the OpenAI API from Rust applications.

Check out the docs.rs.

Installation:

Cargo.toml

[dependencies]
openai-api-rs = "10.0.1"

Usage

The library needs to be configured with your account's secret key, which is available on the website. We recommend setting it as an environment variable. Here's an example of initializing the library with the API key loaded from an environment variable and creating a completion:

Set OPENAI_API_KEY or OPENROUTER_API_KEY to environment variable
$ export OPENAI_API_KEY=sk-xxxxxxx
or
$ export OPENROUTER_API_KEY=sk-xxxxxxx
Create OpenAI client
let api_key = env::var("OPENAI_API_KEY").unwrap().to_string();
let mut client = OpenAIClient::builder().with_api_key(api_key).build()?;
Create OpenRouter client
let api_key = env::var("OPENROUTER_API_KEY").unwrap().to_string();
let mut client = OpenAIClient::builder()
    .with_endpoint("https://openrouter.ai/api/v1")
    .with_api_key(api_key)
    .build()?;
Read the full README
Create request
let req = ChatCompletionRequest::new(
    GPT4_O.to_string(),
    vec![chat_completion::ChatCompletionMessage {
        role: chat_completion::MessageRole::user,
        content: chat_completion::Content::Text(String::from("What is bitcoin?")),
        name: None,
        tool_calls: None,
        tool_call_id: None,
    }],
);
Send request
let result = client.chat_completion(req)?;
println!("Content: {:?}", result.choices[0].message.content);

for (key, value) in client.headers.unwrap().iter() {
    println!("{}: {:?}", key, value);
}
Set OPENAI_API_BASE to environment variable (optional)
$ export OPENAI_API_BASE=https://api.openai.com/v1

Example of chat completion

use openai_api_rs::v1::api::OpenAIClient;
use openai_api_rs::v1::chat_completion::{self, ChatCompletionRequest};
use openai_api_rs::v1::common::GPT4_O;
use std::env;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let api_key = env::var("OPENAI_API_KEY").unwrap().to_string();
    let mut client = OpenAIClient::builder().with_api_key(api_key).build()?;

    let req = ChatCompletionRequest::new(
        GPT4_O.to_string(),
        vec![chat_completion::ChatCompletionMessage {
            role: chat_completion::MessageRole::user,
            content: chat_completion::Content::Text(String::from("What is bitcoin?")),
            name: None,
            tool_calls: None,
            tool_call_id: None,
        }],
    );

    let result = client.chat_completion(req).await?;
    println!("Content: {:?}", result.choices[0].message.content);

    for (key, value) in client.headers.unwrap().iter() {
        println!("{}: {:?}", key, value);
    }

    Ok(())
}

Example for OpenRouter

use openai_api_rs::v1::api::OpenAIClient;
use openai_api_rs::v1::chat_completion::{self, ChatCompletionRequest};
use openai_api_rs::v1::common::GPT4_O_MINI;
use std::env;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let api_key = env::var("OPENROUTER_API_KEY").unwrap().to_string();
    let mut client = OpenAIClient::builder()
        .with_endpoint("https://openrouter.ai/api/v1")
        .with_api_key(api_key)
        .build()?;

    let req = ChatCompletionRequest::new(
        GPT4_O_MINI.to_string(),
        vec![chat_completion::ChatCompletionMessage {
            role: chat_completion::MessageRole::user,
            content: chat_completion::Content::Text(String::from("What is bitcoin?")),
            name: None,
            tool_calls: None,
            tool_call_id: None,
        }],
    );

    let result = client.chat_completion(req).await?;
    println!("Content: {:?}", result.choices[0].message.content);

    for (key, value) in client.headers.unwrap().iter() {
        println!("{}: {:?}", key, value);
    }

    Ok(())
}

More Examples: examples

Check out the full API documentation for examples of all the available functions.

Supported APIs

License

This project is licensed under MIT license.

Runs on
GPU support unknown
What shows it
  • no dependency or feature matches a backend row
Native code
None found
  • No native code found
Python bindings
No Python binding crate found
License
MIT

Compare with similar projects

Order: strongest tier first, then most downloads, then name, with unmeasured values last. A library counts downloads over 30 days. An app counts binary downloads per release. An app with none counts its crate downloads over 30 days. ML Rust runs this catalogue, so its closest project always gets a row.

openai-api-rs beside the projects that share a topic with it
ProjectDownloadsDependentsStarsLatest releaseRuns on (GPU)Native codeLicense
openai-api-rs This page Listed

OpenAI API client library for Rust (unofficial)

46,400 downloads over 30 days 33 485 10.0.2 GPU support unknown No native code found MIT
async-openai Featured

Rust library for OpenAI

1,302,033 downloads over 30 days 275 2,031 0.43.0 GPU support unknown No native code found MIT
rust-genai Featured

Multi-AI Providers Library for Rust. (OpenAI, Gemini, Anthropic, DeepSeek, Ollama, OMLX, AWS Bedrock, Vertex, Xai, Groq, Kimi, GLM and many more)

118,643 downloads over 30 days 81 938 0.7.3 GPU support unknown No native code found Apache-2.0 OR MIT
ollama-rs Featured

A Rust library for interacting with the Ollama API

45,579 downloads over 30 days 68 1,061 0.3.6 GPU support unknown No native code found MIT
openai Listed

An unofficial Rust library for the OpenAI API.

10,846 downloads over 30 days 13 128 1.1.1 GPU support unknown No native code found MIT
mistralai-client-rs Listed Dormant

Mistral AI API client library for Rust (unofficial).

518 downloads over 30 days 4 48 0.14.0 GPU support unknown No native code found Apache-2.0
blazr App Listed

Inference server for LLMs, speech and embeddings: OpenAI-compatible routes with streaming, plus speech synthesis (TTS) and transcription (ASR). Serves Llama, Mistral, Qwen, Mamba2, MLA+MoE and hybrid models from SafeTensors, AWQ, GPTQ and GGUF.

8 binary downloads per release Not applicable 7 0.7.1 CUDA, WebGPU Binds native code: ring (feature distributed) Apache-2.0
Why ListedNo archive, New or Featured rule places it, so it is Listed.

What it lacks for Featured

  • It has 4 active dependents and 1 new dependents in 365 days. Featured needs 11 active dependents or 9 new dependents in 365 days. The repository route reads 485 stars, 93 forks and 33 contributors. It needs 4,539 stars, 434 forks and 79 contributors together.

What else the check found

  • The last activity is on 3 Oct 2026, 37 days ago. The rules expect an update within 365 days. Dormancy rule

Exact rules: Listed, Featured library. The check on applied thresholds version 9.

Every rule outcome, as the check records it
  • expected-interval: version 10.0.2 base 300, raised to the 365-day floor: E = 365 days
  • dormancy: last activity 2026-10-03, 37 days ago, E = 365: active
  • featured: not featured: active_users 4 < 11 and new_adopters 1 < 9 and repository route stars 485 (needs 4539), forks 93 (needs 434), contributors 33 (needs 79)
  • listed: listed: no archive, new or featured rule applies

Measurements and sources

Each signal row shows the raw value, its source and the fetch date. The Sources list gathers every distinct source on this page. Movement needs more history.

Sources6 sources
Adoption4 active dependents, 1 new dependents in 365 days1 not measured
Adoption measurements
SignalValueSourceFetchedCounts
Active dependents4crates.io database dumpYes
New dependents (365 days)1crates.io database dumpYes
Peak active dependents14.5crates.io database dumpYes
Active dependents as a share of the peak0.7625crates.io database dumpYes
Binary downloads per releaseNot measuredYes
MaintenanceLatest human commit: 37 days ago3 not measured
Maintenance measurements
SignalValueSourceFetchedCounts
Latest human commit2026-10-03GitHub repositoryYes
Latest release2026-10-03crates.io database dumpYes
First release2022-12-12crates.io database dumpYes
Latest version10.0.2crates.io database dumpYes
Days the oldest outside issue waits for a reply670GitHub repositoryYes
Maintainer replies over 365 days13GitHub repositoryYes
Repository archivedfalseGitHub repositoryYes
Repository gonefalseGitHub repositoryYes
Release commit or manifest in the repotruecrates.io packageYes
Published docstruecrates.io database dumpYes
Latest release fails cargo checkNot measuredYes
Build check dateNot measuredYes
Build check toolchainNot measuredYes
SecurityUnpatched vulnerabilities: none
Security measurements
SignalValueSourceFetchedCounts
Unpatched vulnerabilities past the grace windownoneRustSec advisory databaseYes
RustSec unmaintained advisorynoneRustSec advisory databaseYes
Deprecation noticenonecrates.io database dumpYes
Deprecated requirementnonecrates.io database dumpYes
Distribution97 releases, 46,400 downloads over 30 days5 not measured
Distribution measurements
SignalValueSourceFetchedCounts
Releases97crates.io database dumpYes
Downloads over 30 days46400crates.io database dumpYes
Binary downloads over the last 3 releasesNot measuredYes
Homebrew installs on request over 365 daysNot measuredYes
Repology repository familiesNot measuredYes
Docker pull growth over 90 daysNot measuredYes
Docker pulls at the growth baselineNot measuredYes
Every version a prereleasefalsecrates.io database dumpYes
Every version 0.0.xfalsecrates.io database dumpYes
Every version yankedfalsecrates.io database dumpYes
Crate deleted from crates.iofalsecrates.io database dumpYes
Repository485 stars, 93 forks, 33 contributors, 409 commits. Stars alone never qualify a project.
Repository measurements
SignalValueSourceFetchedCounts
GitHub stars485GitHub repositoryYes — one part of the repository route
GitHub forks93GitHub repositoryYes — one part of the repository route
Contributors with a GitHub account33GitHub contributorsYes — one part of the repository route
Commits on the default branch409GitHub repositoryNo
Repository's main crate left out of the entrynonecrates.io database dumpYes
Facts that never count
Facts that never count measurements
SignalValueSourceFetchedCounts
LicenseMITcrates.io database dumpNo
Runs on, from listed crates and their direct dependenciesGPU support unknowncrates.io database dumpNo
What shows each backendno dependency or feature matches a backend rowcrates.io database dumpNo
Native code, from listed crates and their dependenciesNo native code foundcrates.io database dumpNo
Python bindings, from direct dependencies of listed cratesNo Python binding crate foundcrates.io database dumpNo
Crates that depend on a listed crate directly33crates.io database dumpNo

Corrections and review history

Report a correction

No correction applies to this entry.

Judgments

A judgment enters only through an approved issue and a merged pull request.

No judgment applies to this entry.