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

# Supported Models

> Every model id the Developer API accepts on run-creating endpoints.

Every run-creating endpoint accepts an optional `model` field. When omitted, runs use the default model, currently `anthropic/claude-sonnet-5`. Send the exact, case-sensitive, provider-qualified id from the table below. For example, `claude-sonnet-5` is rejected.

For request examples and lifecycle policy, see [Models](/developer-api/models).

## Catalog

| Model id                      | Name              | Provider  | Cost tier | Status           | Access                     |
| ----------------------------- | ----------------- | --------- | --------- | ---------------- | -------------------------- |
| `anthropic/claude-fable-5`    | Claude Fable 5    | Anthropic | 6         | Legacy           | Paid plan and gated access |
| `anthropic/claude-sonnet-5`   | Claude Sonnet 5   | Anthropic | 3         | Current, default | Everyone                   |
| `anthropic/claude-opus-4-8`   | Claude Opus 4.8   | Anthropic | 5         | Legacy           | Paid plan                  |
| `anthropic/claude-opus-4-7`   | Claude Opus 4.7   | Anthropic | 5         | Legacy           | Paid plan                  |
| `anthropic/claude-opus-4-6`   | Claude Opus 4.6   | Anthropic | 5         | Legacy           | Paid plan                  |
| `anthropic/claude-sonnet-4-6` | Claude Sonnet 4.6 | Anthropic | 4         | Legacy           | Everyone                   |
| `anthropic/claude-haiku-4-5`  | Claude Haiku 4.5  | Anthropic | 2         | Current          | Everyone                   |
| `google/gemini-3.1-pro`       | Gemini 3.1 Pro    | Google    | 2         | Current          | Everyone                   |
| `google/gemini-3.5-flash`     | Gemini 3.5 Flash  | Google    | 3         | Legacy           | Everyone                   |
| `google/gemini-3.8-flash`     | Gemini 3.8 Flash  | Google    | 2         | Current          | Gated access               |
| `openai/gpt-6-astra`          | GPT-6 Astra       | OpenAI    | 6         | Current          | Paid plan and gated access |
| `openai/gpt-5.6-sol`          | GPT-5.6 Sol       | OpenAI    | 5         | Current          | Gated access               |
| `openai/gpt-5.6-terra`        | GPT-5.6 Terra     | OpenAI    | 4         | Current          | Gated access               |
| `openai/gpt-5.6-luna`         | GPT-5.6 Luna      | OpenAI    | 2         | Current          | Gated access               |
| `openai/gpt-5.5`              | GPT-5.5           | OpenAI    | 5         | Legacy           | Everyone                   |
| `moonshotai/kimi-k3`          | Kimi K3           | Moonshot  | 4         | Current          | Everyone                   |
| `deepseek/deepseek-v4-flash`  | DeepSeek V4 Flash | DeepSeek  | 1         | Current          | Everyone                   |
| `sakana/fugu-ultra`           | Fugu Ultra        | Sakana    | 5         | Current          | Paid plan                  |
| `z-ai/glm-5.2`                | GLM 5.2           | Z.ai      | 2         | Legacy           | Everyone                   |

Cost tiers are relative token-pricing tiers, where 1 is cheapest and 6 is most expensive. Credits are charged from actual token usage, so model choice directly changes what a run costs.

**Gated access** and **paid plan** are enforced at run time: an unknown or rollout-hidden id returns 400 `MODEL_NOT_SUPPORTED`; a known id your account cannot run returns 403 `MODEL_NOT_ALLOWED`. For capability guidance, see the [model comparison](/features/models).