> This page is for NeMo Relay, version v0.9.4.
> For other versions, use one of these documentation indexes:
> - Latest (v0.10.0) (default): https://docs.nvidia.com/nemo/relay/latest/llms.txt
> - dev: https://docs.nvidia.com/nemo/relay/dev/llms.txt
> - v0.10.0: https://docs.nvidia.com/nemo/relay/v0.10.0/llms.txt
> - v0.9.4: https://docs.nvidia.com/nemo/relay/v0.9.4/llms.txt
> - v0.8.4: https://docs.nvidia.com/nemo/relay/v0.8.4/llms.txt
> - v0.7.3: https://docs.nvidia.com/nemo/relay/v0.7.3/llms.txt
> - v0.6.0: https://docs.nvidia.com/nemo/relay/v0.6.0/llms.txt
> - v0.5.0: https://docs.nvidia.com/nemo/relay/v0.5.0/llms.txt

> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.nvidia.com/nemo/relay/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.nvidia.com/nemo/relay/_mcp/server.

# Enum Builtin LlmCodec

> Relay's built-in LLM codec identities.

Generated from `cargo doc --no-deps -p nemo-relay -p nemo-relay-adaptive -p nemo-relay-pii-redaction -p nemo-relay-ffi -p nemo-relay-types -p nemo-relay-plugin -p nemo-relay-worker-proto -p nemo-relay-worker`.

```rust
pub enum BuiltinLlmCodec {
    OpenAiChat,
    OpenAiResponses,
    AnthropicMessages,
    OCIGenAI,
    GeminiGenerateContent,
}
```

Relay's built-in LLM codec identities.

## Variants

### `OpenAiChat`

<pre />

OpenAI Chat Completions request and response payloads.

### `OpenAiResponses`

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OpenAI Responses request and response payloads.

### `AnthropicMessages`

<pre />

Anthropic Messages request and response payloads.

### `OCIGenAI`

<pre />

OCI Generative AI chat request and response payloads.

### `GeminiGenerateContent`

<pre />

Gemini generateContent request and response payloads.

## Implementations

### `impl BuiltinLlmCodec`

<pre />

#### `ALL`

<pre />

Every built-in codec identity in stable ID order.

#### `id`

<pre />

Stable identifier used in configuration and SDK transport boundaries.

#### `from_id`

<pre />

Resolve a stable built-in codec identifier.

## Trait Implementations

### `impl Clone for BuiltinLlmCodec`

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#### `clone`

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#### `clone_from`

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### `impl Debug for BuiltinLlmCodec`

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#### `fmt`

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### `impl<'de> Deserialize<'de> for BuiltinLlmCodec`

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#### `deserialize`

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### `impl PartialEq for BuiltinLlmCodec`

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#### `eq`

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#### `ne`

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### `impl Serialize for BuiltinLlmCodec`

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#### `serialize`

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### `impl Copy for BuiltinLlmCodec`

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### `impl Eq for BuiltinLlmCodec`

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### `impl StructuralPartialEq for BuiltinLlmCodec`

<pre />