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

# Models overview

> Every model category OpenPAI supports, with representative models

OpenPAI continuously integrates the major model vendors. Below is an overview as of this documentation version.
For the **live availability list and latest prices**, refer to [Console → Models](https://openp.ai/dashboard/models).

## By vendor

<CardGroup cols={2}>
  <Card title="OpenAI family" icon="o" href="/en/models/openai">
    GPT-5.5 / 5.4, o4-mini, o3, GPT-4o, gpt-image-2, gpt-realtime, Whisper, TTS
  </Card>

  <Card title="Anthropic Claude" icon="a" href="/en/models/anthropic">
    Claude Opus 4.8, Sonnet 4.6, Haiku 4.5, with thinking / adaptive-thinking modes
  </Card>

  <Card title="Google Gemini" icon="g" href="/en/models/google">
    Gemini 3.1 Pro, 3.5 Flash, 3.1 Flash-Lite, Nano Banana, Veo
  </Card>

  <Card title="Image / music" icon="image" href="/en/models/midjourney-suno">
    Midjourney (Imagine / Upscale / Blend), Suno, Udio
  </Card>

  <Card title="Embeddings & rerank" icon="vector-square" href="/en/models/embeddings-rerank">
    text-embedding-3-\*, bge, Cohere, Jina Rerank
  </Card>

  <Card title="Chinese vendors" icon="globe">
    DeepSeek-V3 / R1, Qwen3, GLM-4.6, Doubao, Kimi, Yi and more
  </Card>
</CardGroup>

## By use case

| Use case                     | Recommended (cheap)                                         | Recommended (high quality)                                                                      |
| ---------------------------- | ----------------------------------------------------------- | ----------------------------------------------------------------------------------------------- |
| General chat                 | `gpt-5.4-mini`, `claude-haiku-4-5`, `gemini-3.1-flash-lite` | `gpt-5.5`, `claude-opus-4-8`, `gemini-3.1-pro-preview`, `gemini-3.5-flash`                      |
| Long context                 | `gemini-3.1-flash-lite` (1M)                                | `gemini-3.1-pro-preview` (1M), `claude-opus-4-8` (1M), `claude-sonnet-4-6` (1M), `gpt-5.5` (1M) |
| Complex reasoning            | `o4-mini`, `deepseek-r1`                                    | `gpt-5.5` (high), `claude-opus-4-8`, `o3`, `gemini-3.1-pro-preview`                             |
| Vision (image understanding) | `gpt-5.4-mini`, `gemini-3.1-flash-lite`                     | `gpt-5.5`, `claude-opus-4-8`, `gemini-3.1-pro-preview`                                          |
| Code                         | `claude-haiku-4-5`, `gpt-5.4-mini`                          | `claude-opus-4-8`, `gpt-5.5`, `gemini-3.1-pro-preview`                                          |
| Translation                  | `gpt-5.4-mini`                                              | `claude-opus-4-8`                                                                               |
| Function calling             | `gpt-5.4-mini`                                              | `gpt-5.5`, `claude-opus-4-8`, `gemini-3.1-pro-preview`                                          |
| Image generation             | `dall-e-3`, `imagen-4`                                      | `gpt-image-2`, `mj_imagine`, `nano-banana-pro`                                                  |
| Text embeddings              | `text-embedding-3-small`, `gemini-embedding-2`              | `text-embedding-3-large`                                                                        |
| Audio transcription          | `whisper-1`, `gpt-4o-mini-transcribe`                       | `gpt-4o-transcribe`                                                                             |
| Text to speech               | `tts-1`                                                     | `tts-1-hd`, `gpt-4o-mini-tts`, `gemini-3.1-flash-tts-preview`                                   |
| Realtime voice               | —                                                           | `gpt-realtime-2`, `gemini-3.1-flash-live-preview`                                               |
| Video generation             | —                                                           | `sora-2`, `veo-3.1`                                                                             |

## Model ID naming conventions

* **Official original ID**: `gpt-5.5`, `claude-opus-4-8`, `gemini-3.1-pro-preview` — consistent with each vendor.
* **Reasoning-effort suffix**: `-high` / `-medium` / `-low` controls the reasoning budget of o3, gpt-5.x, Gemini Thinking, etc.
* **Thinking toggle**: `claude-3-7-sonnet-20250219-thinking`, `gemini-2.5-flash-thinking` etc. explicitly enable thinking mode.
* **No-thinking variant**: `gemini-2.5-flash-nothinking` etc. explicitly disable thinking.
* **Image / music specialized**: `mj_imagine`, `mj_upscale`, `suno_v3.5`.

## Capability matrix

| Model family       | Streaming | Tool calls | Vision | Thinking | JSON mode | Prompt caching |
| ------------------ | :-------: | :--------: | :----: | :------: | :-------: | :------------: |
| GPT-5.x family     |     ✅     |      ✅     |    ✅   |     ✅    |     ✅     |        ✅       |
| GPT-4o family      |     ✅     |      ✅     |    ✅   |     —    |     ✅     |        ✅       |
| o-series reasoning |     ✅     |      ✅     |    ✅   |     ✅    |     ✅     |        ✅       |
| Claude 4.x         |     ✅     |      ✅     |    ✅   |     ✅    |  ✅ (JSON) |        ✅       |
| Gemini 3.x / 2.5   |     ✅     |      ✅     |    ✅   |     ✅    |     ✅     |        ✅       |
| DeepSeek-V3 / R1   |     ✅     |      ✅     |    —   |   R1 ✅   |     ✅     |        —       |
| Qwen3              |     ✅     |      ✅     |  VL ✅  |     —    |     ✅     |        —       |

## Model changes & retirement

* **Additions**: new models are added continuously; the console model list is authoritative.
* **Retirement**: when an upstream deprecates a model, OpenPAI announces it 7-14 days in advance and stops accepting new requests.
* **Price changes**: multiplier changes are announced 24 hours in advance; orders already generated are settled at the multiplier in effect at call time.

## Next steps

<CardGroup cols={2}>
  <Card title="Billing" icon="coins" href="/en/pricing/billing">
    Charging rules for tokens, multipliers, cache and chain of thought.
  </Card>

  <Card title="API reference" icon="code" href="/en/api-reference/introduction">
    Request / response fields for every endpoint.
  </Card>
</CardGroup>