# Models and pricing



The gateway routes one model catalog across OpenAI, Anthropic, and open-weight
providers. Pass any ID below as `model`. An unknown ID returns `400`.

Prices are USD per million tokens. **Cache write** and **cache read** apply to
prompt caching; models without cache-write pricing still discount cached reads.

Query the live catalog at any time:

```bash
curl https://llm.clusterbase.dev/v1/models \
  -H "Authorization: Bearer $CLUSTER_API_KEY"
```

Each entry includes the context window, default output limit, supported
reasoning levels, supported speeds, and the standard rate card.

## Current models [#current-models]

| Model                  | Context   | Input  | Output | Cache write | Cache read |
| ---------------------- | --------- | ------ | ------ | ----------- | ---------- |
| `gpt-6-astra`          | 1,050,000 | $10.00 | $50.00 | $12.50      | $1.00      |
| `gpt-5.6`              | 1,050,000 | $4.00  | $20.00 | $5.00       | $0.40      |
| `gpt-5.6-sol`          | 1,050,000 | $4.00  | $20.00 | $5.00       | $0.40      |
| `gpt-5.6-terra`        | 1,050,000 | $2.00  | $12.00 | $2.50       | $0.20      |
| `gpt-5.6-luna`         | 1,050,000 | $0.20  | $1.20  | $0.25       | $0.02      |
| `claude-fable-5-1`     | 1,000,000 | $10.00 | $50.00 | $12.50      | $0.25      |
| `claude-fable-5`       | 1,000,000 | $10.00 | $50.00 | $12.50      | $1.00      |
| `claude-opus-5`        | 1,000,000 | $5.00  | $25.00 | $6.25       | $0.50      |
| `claude-sonnet-5`      | 1,000,000 | $2.00  | $10.00 | $2.50       | $0.20      |
| `claude-haiku-4-5`     | 200,000   | $1.00  | $5.00  | $1.25       | $0.10      |
| `kimi-k3`              | 1,048,576 | $3.00  | $15.00 | —           | $0.30      |
| `qwen3p7-plus`         | 262,144   | $0.40  | $1.60  | —           | $0.08      |
| `deepseek-v4-pro-0813` | 1,048,576 | $1.32  | $3.96  | —           | $0.044     |
| `qwen3p8-max`          | 262,144   | $2.00  | $6.00  | —           | $0.25      |

## Aliases [#aliases]

Two product aliases track our recommended defaults, so you get model upgrades
without a code change:

| Alias              | Currently routes to |
| ------------------ | ------------------- |
| `chat-model-smart` | `gpt-5.6-terra`     |
| `chat-model-fast`  | `gpt-5.6-luna`      |

Aliases run without reasoning; a request that sets `reasoning_effort` on an
alias returns `400`. Use a concrete model ID when you need reasoning control.

## Fast mode [#fast-mode]

GPT-6 Astra and the GPT-5.6 family accept `"speed": "fast"` for
lower-latency inference. Fast requests bill at twice the standard rate. All
other models run at standard speed only; check `supported_speeds` in
`/v1/models`.

## Long-context pricing [#long-context-pricing]

For GPT-6 Astra and the GPT-5.6 family, a request whose input exceeds
272,000 tokens bills the whole request at multiplied rates: input at 2× and
output at 1.5×.

## Reasoning [#reasoning]

Most models accept `reasoning_effort` (for example `low`, `medium`, `high`).
The accepted levels differ per model — read `reasoning_levels` from
`/v1/models`. `claude-haiku-4-5` does not support reasoning. Reasoning output
is only emitted on streaming requests.

GPT-6 Astra (`gpt-6-astra`) accepts `low`, `medium`, `high`, `xhigh`, and
`max`; omitted effort defaults to `medium`. It does not support `temperature`
or `top_p` — requests that set either are rejected with `400`.

`claude-fable-5-1` also accepts `low`, `medium`, `high`, `xhigh`, and `max`,
with adaptive thinking always on; omitted effort defaults to `high`.
It is available for Chat and the [Build CLI](/docs/build/overview) but is not
admitted for Cluster Bot (Computer) sessions.

## Deprecated models [#deprecated-models]

These IDs still resolve but are scheduled for removal. Migrate to a current
model.

| Model               | Input | Output | Replacement       |
| ------------------- | ----- | ------ | ----------------- |
| `gpt-5.5`           | $5.00 | $30.00 | `gpt-5.6`         |
| `gpt-5.4`           | $2.50 | $15.00 | `gpt-5.6-terra`   |
| `gpt-5.2`           | $1.75 | $14.00 | `gpt-5.6-luna`    |
| `claude-opus-4-8`   | $5.00 | $25.00 | `claude-opus-5`   |
| `claude-opus-4-7`   | $5.00 | $25.00 | `claude-opus-5`   |
| `claude-sonnet-4-6` | $3.00 | $15.00 | `claude-sonnet-5` |

`/v1/models` marks these with `"deprecated": true`.