Crate anyllm_translate 

anyllm_translate

Pure, IO-free translation between Anthropic Messages API and OpenAI Chat Completions API.

Quick start

use anyllm_translate::{TranslationConfig, translate_request, translate_response};
use anyllm_translate::anthropic::MessageCreateRequest;

let config = TranslationConfig::builder()
    .model_map("haiku", "gpt-4o-mini")
    .model_map("sonnet", "gpt-4o")
    .model_map("opus", "gpt-4o")
    .build();

let req: MessageCreateRequest = serde_json::from_str(r#"{
    "model": "claude-sonnet-4-6",
    "max_tokens": 100,
    "messages": [{"role": "user", "content": "Hello"}]
}"#).unwrap();

let openai_req = translate_request(&req, &config).unwrap();
assert_eq!(openai_req.model, "gpt-4o");

// ... send openai_req to OpenAI, get response ...
// let anthropic_resp = translate_response(&openai_resp, &req.model);

Modules

• anthropic – Anthropic Messages API types
• openai – OpenAI Chat Completions and Responses API types
• mapping – Stateless conversion functions between APIs
• config – Translation configuration (model mapping, lossy behavior)
• translate – Convenience wrappers combining config with mapping functions

Re-exports

pub use config::LossyBehavior;

pub use config::TranslationConfig;

pub use config::TranslationConfigBuilder;

pub use error::TranslateError;

pub use mapping::gemini_message_map::anthropic_to_gemini_response;

pub use mapping::gemini_message_map::compute_gemini_request_warnings;

pub use mapping::gemini_message_map::gemini_to_anthropic_request;

pub use mapping::reverse_message_map::AnthropicTranslationContext;

pub use mapping::reverse_streaming_map::ReverseStreamingTranslator;

pub use translate::compute_request_warnings;

pub use translate::new_gemini_stream_translator;

pub use translate::new_responses_stream_translator;

pub use translate::new_reverse_stream_translator;

pub use translate::new_stream_translator;

pub use translate::translate_anthropic_to_openai_response;

pub use translate::translate_anthropic_to_openai_response_with_context;

pub use translate::translate_openai_to_anthropic_request;

pub use translate::translate_openai_to_anthropic_request_with_context;

pub use translate::translate_request;

pub use translate::translate_request_gemini;

pub use translate::translate_request_responses;

pub use translate::translate_response;

pub use translate::translate_response_gemini;

pub use translate::translate_response_responses;

pub use translate::TranslationWarnings;

Modules

anthropic

Anthropic Messages API types (request, response, streaming events, errors).

config

Translation configuration: model mapping and lossy-translation behavior.

error

Error types for translation failures.

gemini

Gemini native generateContent API types (request, response).

mapping

Stateless conversion functions between Anthropic and OpenAI API formats.

openai

OpenAI Chat Completions and Responses API types.

translate

Convenience wrappers combining config with mapping functions.

util

Shared utilities: ID generation, JSON helpers, secret redaction.