# Models

> Every model id you can call, its context window, and what it costs per million tokens.

_Source: https://aiprimetech.io/docs/getting-started/models/ · Home > Docs > Getting started_

One key reaches all of these. Use the **API id** column verbatim in the `model` field of a request — display names are not accepted.

| Model | API id | Context | $/M in | $/M out | Saving |
|---|---|---|---|---|---|
| Claude Opus 4.8 | `claude-opus-4-8` | 200K | $3 | $15 | 80% |
| Claude Fable 5 | `claude-fable-5` | 200K / 1M | $3 | $15 | 80% |
| Claude Sonnet 4.6 | `claude-sonnet-4-6` | 200K / 1M | $0.9 | $4.5 | 70% |
| Claude Haiku 4.5 | `claude-haiku-4-5` | 200K | $0.4 | $2 | 60% |
| GPT-5.5 | `gpt-5.5` | 256K | $3 | $12 | 70% |
| GPT-5 | `gpt-5` | 256K | $1.5 | $6 | 70% |
| Gemini 3 Pro | `gemini-3-pro` | 1M | $1 | $6 | 60% |
| Gemini 3 Flash | `gemini-3-flash` | 1M | $0.2 | $1.2 | 60% |
| MiniMax M3 | `minimax-m3` | 1M | $0.5 | $2.5 | 58% |

Prices are per million tokens in credits. Live ids are always available from the models endpoint:

```bash
curl https://aiprimetech.io/v1/models -H "Authorization: Bearer $CLAUDEAPIKEY"
```


## Choosing a model

| Task | Recommended | Why |
|---|---|---|
| Agentic coding, refactors, architecture | `claude-opus-4-8` | Strongest multi-step reasoning; worth the output price on hard work |
| Everyday coding, chat, general work | `claude-sonnet-4-6` | The default — roughly a fifth of Opus's rate at close quality on most tasks |
| Classification, extraction, routing | `claude-haiku-4-5` | Cheapest Claude; these tasks do not need a frontier model |
| Very large documents | `gemini-3-pro` | 1M context at a low input rate |
| High-volume batch | `gemini-3-flash` or `minimax-m3` | Lowest per-token cost in the catalog |

> The biggest single cost lever is **routing by task**. Output tokens cost 4–5× input on every frontier model, so sending classification work to Opus wastes money at roughly 7× the Haiku rate. See [Cost control](/docs/guides/cost-control/).


## Long context

`claude-sonnet-4-6` also serves a 1M-token variant, billed at a higher rate than the 200K version because long context is more expensive upstream. Gemini models take 1M natively. Sending 500K tokens of context on every turn is rarely the cheapest way to solve a problem — see [Context management](/docs/guides/context-management/).


## Model aliases

Ids are pinned, not floating. `claude-sonnet-4-6` always means that version — it will not silently become a different model under you. When we add a successor it gets a new id, and the old one keeps working until formally retired via the [changelog](/docs/resources/changelog/).

- [Model catalog](https://aiprimetech.io/models/) — Per-model pages with benchmarks
- [Pricing](https://aiprimetech.io/docs/billing/pricing/) — How credits convert to tokens
- [Cost control](https://aiprimetech.io/docs/guides/cost-control/) — Cut spend without losing quality


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_ClaudeAPIKey.dev is an independently operated, Anthropic-compatible API gateway. Not affiliated with Anthropic._