> ## Documentation Index
> Fetch the complete documentation index at: https://fireworks.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> For Fireworks Nexus, start at https://docs.fireworks.ai/nexus.
> Use https://docs.fireworks.ai/nexus/quickstart for coding harnesses, custom agents, APIs, SDKs, and LLM gateways.
> Use https://docs.fireworks.ai/ecosystem/firerouter/overview for model router types, composition, and pricing.
> Prefer canonical short model IDs such as firerouter/opus. In LiteLLM, use the fireworks_ai/ provider prefix.
> Family names such as opus track the latest evaluated family version; do not describe them as fixed model versions.

# Open Models

> Use auto, version-tracking aliases, fast tiers, or pinned Fireworks open models in coding workflows.

Use a Fireworks open model directly when you want Fireworks to serve every turn. FireConnect automatically registers the coding-ready catalog when you connect a harness.

## Start with `auto`

`auto` chooses from frontier open models for each new user turn. It is the default on a standard Fireworks key.

Use `auto-instant` when you want a latency-first open-model mix. If fast models are disabled by model governance, use `auto`.

```bash wrap theme={null}
fireconnect claude
```

Restart Claude Code, open `/model`, and select **Auto**. No `--model` flag is required.

## Choose a family, tier, or version

Use `--model` only when you want a specific family, tier, or version:

```bash wrap theme={null}
fireconnect claude --model glm-latest
```

| Kind       | Example IDs                                        | Behavior                                       |
| ---------- | -------------------------------------------------- | ---------------------------------------------- |
| **Latest** | `kimi-latest`, `glm-latest`, `deepseek-pro-latest` | Tracks the current version in the model family |
| **Fast**   | `kimi-fast-latest`, `glm-fast-latest`              | Favors lower latency at a higher token price   |
| **Pinned** | `kimi-k3`, `glm-5p3`, `glm-5p3-flash`              | Stays on the named version                     |

Prefer `*-latest` unless you need a pinned version.

## Find a model ID

```bash wrap theme={null}
fireconnect model list
fireconnect model list --search glm
fireconnect model list --refresh
```

The catalog is cached for one hour. `--refresh` fetches the latest copy.

## Check image support

`glm-latest` and `glm-fast-latest` are text-only. Image support for other aliases depends on the model currently behind each alias. Check `fireconnect model list` before sending images.

If an image reaches a text-only model in Claude Code, use `/rewind` or switch to a vision-capable model such as Kimi or `glm-5p3-flash`.

## Use US-only models

Use the current model IDs, endpoint, and pricing guidance from [US-only Serverless](/docs/serverless/us-only-serverless#available-models).

## Pricing

Open models bill to your Fireworks account at [Serverless Pricing](/docs/serverless/pricing). For per-session estimates and account usage, see [Usage and Cost](/docs/nexus/metrics).