Models API | 200+ AI Models List | LaoZhang API

API Overview

The Models API is used to obtain the AI model list and detailed information supported by the Laozhang API platform. Through this interface, you can view all available models, understand model features, and pricing information.

API Information

API Endpoint: GET https://api.laozhang.ai/v1/models Compatibility: Fully compatible with OpenAI official API format

Get Model List

Request Examples

curl https://api.laozhang.ai/v1/models \
  -H "Authorization: Bearer YOUR_API_KEY"

Response Format

{
  "object": "list",
  "data": [
    {
      "id": "gpt-4o",
      "object": "model",
      "created": 1687882411,
      "owned_by": "openai",
      "permission": [
        {
          "id": "modelperm-xxx",
          "object": "model_permission",
          "created": 1687882411,
          "allow_create_engine": false,
          "allow_sampling": true,
          "allow_logprobs": true,
          "allow_search_indices": false,
          "allow_view": true,
          "allow_fine_tuning": false,
          "organization": "*",
          "group": null,
          "is_blocking": false
        }
      ],
      "root": "gpt-4o",
      "parent": null
    },
    {
      "id": "gpt-4o-mini",
      "object": "model",
      "created": 1687882411,
      "owned_by": "openai",
      "permission": [...],
      "root": "gpt-4o-mini",
      "parent": null
    }
  ]
}

Get Specific Model Information

Request Examples

curl https://api.laozhang.ai/v1/models/gpt-4o \
  -H "Authorization: Bearer YOUR_API_KEY"

Response Format

{
  "id": "gpt-4o",
  "object": "model",
  "created": 1687882411,
  "owned_by": "openai",
  "permission": [
    {
      "id": "modelperm-xxx",
      "object": "model_permission",
      "created": 1687882411,
      "allow_create_engine": false,
      "allow_sampling": true,
      "allow_logprobs": true,
      "allow_search_indices": false,
      "allow_view": true,
      "allow_fine_tuning": false,
      "organization": "*",
      "group": null,
      "is_blocking": false
    }
  ],
  "root": "gpt-4o",
  "parent": null
}

Response Field Descriptions

Field	Type	Description
`id`	string	Unique identifier for the model
`object`	string	Object type, fixed as “model”
`created`	integer	Model creation timestamp
`owned_by`	string	Model owner
`permission`	array	Model permission list
`root`	string	Root model name
`parent`	string	Parent model name (if applicable)

Major Model Categories

OpenAI Series

GPT-5.5 Series

OpenAI’s current flagship model family for complex reasoning, professional work, and code generation.Available Models:

gpt-5.5 - Latest flagship model
gpt-5.5-pro - Higher-compute version for hard problems and long workflows

Features:

Supports 1M context
Strong complex reasoning and coding-agent performance
Excellent multilingual capabilities

GPT-5 / GPT-4.1 Series

Stable general-purpose model families for production and cost-sensitive workloads.Available Models:

gpt-5 - Advanced general tasks
gpt-5-mini - Lightweight and efficient version
gpt-5-nano - High-volume low-cost tasks
gpt-4.1 - Classic stable model
gpt-4.1-mini - Fast, economical general-purpose choice

Features:

Compatible with common OpenAI SDKs
Covers high-quality and low-cost needs
Good code understanding capability

Reasoning Models

Models designed specifically for complex reasoning tasksAvailable Models:

o3-pro - Top-tier reasoning tasks
o3 - Complex reasoning, math, and programming
o4-mini - Lightweight reasoning and coding value

Features:

Powerful mathematical reasoning ability
Suitable for complex logical problems
Choose model tier based on task complexity

Claude Series

Claude 4.7 / 4.6 Series

Anthropic’s current main model family for coding agents, complex reasoning, and long-text work.Available Models:

claude-opus-4-7 - Current most capable general model
claude-opus-4-7-thinking - Deep reasoning mode
claude-sonnet-4-6 - Balanced speed, cost, and intelligence
claude-sonnet-4-6-thinking - Sonnet reasoning mode
claude-haiku-4-5 - Fast lightweight version

Features:

Excellent code generation capability
Strong text understanding ability
Good fit for multi-step tool use and long workflows

Claude 4.5 / Legacy Compatibility

Classic high-performance versions for existing projects. New integrations should prefer Opus 4.7 or Sonnet 4.6.Available Models:

claude-opus-4-5 - Classic high-performance version
claude-sonnet-4-5 - Stable coding version
claude-3-7-sonnet-latest - Legacy compatibility
claude-3-5-sonnet-latest - Legacy compatibility

Features:

Useful for smooth migration of existing configs
Not recommended as the first example for new docs

Google Gemini Series

Gemini 3.1 / 3 Series

Google’s latest Gemini series for multimodal, long-context, and tool-use workloads.Available Models:

gemini-3.1-pro-preview - Latest Pro preview model
gemini-3.1-pro-preview-customtools - Custom tools and bash workflows
gemini-3-flash-preview - Fast multimodal model
gemini-3.1-flash-lite-preview - Lightweight fast version
gemini-3-pro-image-preview - Image generation model

Features:

Long-context and multimodal input
Strong multimodal capabilities
gemini-3-pro-preview has been shut down; migrate to gemini-3.1-pro-preview

Gemini 2.5 Series

Stable production-ready Gemini 2.5 models.Available Models:

gemini-2.5-pro - Stable long-context and multimodal model
gemini-2.5-flash - Fast response version
gemini-2.5-flash-lite - Lightweight version
gemini-2.5-flash-image - Image generation version

Features:

Good fit for production and cost optimization
Complements Gemini 3 for stable vs. preview choices

Chinese Language Models

Alibaba Tongyi Series

Large language models developed by AlibabaAvailable Models:

qwen-turbo - Fast version
qwen-plus - High-performance version
qwen-max - Most powerful version

Features:

Outstanding Chinese capabilities
Rich multi-domain knowledge
High cost-performance ratio

DeepSeek Series

Models focused on code and reasoningAvailable Models:

deepseek-chat - Dialogue model
deepseek-coder - Code-specific
deepseek-v2.5 - Latest version

Features:

Outstanding code capabilities
Strong reasoning ability
Open-source friendly

Zhipu GLM Series

Large models developed by Tsinghua UniversityAvailable Models:

glm-4 - Fourth generation model
glm-4v - Multimodal version
glm-3-turbo - Fast version

Features:

Strong academic capabilities
Excellent Chinese-English bilingual
Suitable for research applications

Image Generation Models

Text-to-Image

Model ID	Provider	Features	Price
`dall-e-3`	OpenAI	High-quality image generation	$0.04/image
`dall-e-2`	OpenAI	Classic image generation	$0.02/image
`gpt-4o-image`	Laozhang API optimized	Ultra-high cost-performance	$0.01/image
`flux-pro`	Flux	Professional-grade quality	$0.05/image
`flux-dev`	Flux	Development version	$0.03/image
`midjourney-v6`	Midjourney	Strong artistic quality	$0.08/image
`stable-diffusion-xl`	Stability AI	Open-source high-quality	$0.02/image

Image Understanding

Model ID	Provider	Features	Price
`gpt-4o`	OpenAI	Strong image understanding	$5/1M tokens
`gpt-4o-mini`	OpenAI	Lightweight image understanding	$0.15/1M tokens
`gemini-3.1-pro-preview`	Google	Multimodal understanding, long context	Check console
`claude-opus-4-7`	Anthropic	Document image understanding, complex analysis	Check console

Audio Models

Text-to-Speech (TTS)

Model ID	Provider	Features	Price
`tts-1`	OpenAI	Standard speech synthesis	$15/1M characters
`tts-1-hd`	OpenAI	High-definition speech synthesis	$30/1M characters

Speech-to-Text (STT)

Model ID	Provider	Features	Price
`whisper-1`	OpenAI	Multilingual speech recognition	$0.006/minute

Usage Recommendations

Select Models by Scenario

Daily Conversations

Recommended: GPT-5.5, Claude Sonnet 4.6, Gemini 3 Flash Preview Features: Fast response, low cost, good quality

Code Generation

Recommended: GPT-5.5, Claude Opus 4.7, Claude Sonnet 4.6 Features: Strong code understanding, high generation quality

Complex Reasoning

Recommended: GPT-5.5, o3-pro, Claude Opus 4.7 Thinking Features: Strong logical reasoning, suitable for math problems

Chinese Processing

Recommended: Tongyi Qianwen, GLM-4, Wenxin Yiyan Features: Excellent Chinese understanding and generation

Cost-Performance Selection

Budget Priority

Recommended Models:

gpt-4.1-mini
claude-haiku-4-5
gemini-3.1-flash-lite-preview
deepseek-chat

Suitable Scenarios:

Large-scale text processing
Batch data analysis
Development and testing phases

Performance Priority

Recommended Models:

gpt-5.5
claude-opus-4-7
claude-opus-4-7-thinking
gemini-3.1-pro-preview

Suitable Scenarios:

Critical business applications
Complex reasoning tasks
High-quality content generation

Balanced Choice

Recommended Models:

claude-sonnet-4-6
gpt-5
gemini-2.5-pro
o4-mini

Suitable Scenarios:

Daily business applications
Medium-complexity tasks
Long-term stable usage

Real-time Model Information Retrieval

You can obtain the latest model list and pricing information in real-time through the API:

import requests

# Get model list
response = requests.get(
    "https://api.laozhang.ai/v1/models",
    headers={"Authorization": "Bearer YOUR_API_KEY"}
)

models = response.json()
for model in models['data']:
    print(f"Model: {model['id']}, Owner: {model['owned_by']}")

Error Handling

Error Code	Description	Solution
401	Invalid API Key	Check if API Key is correct
403	Insufficient permissions	Confirm API Key has access permissions
404	Model does not exist	Check if model ID is correct
429	Too many requests	Reduce request frequency
500	Server error	Retry later or contact support

View Complete Model List

View detailed information and pricing for all 200+ AI models

Start Using Chat API

Learn how to call models using Chat Completions API

Core APIs

Model Guides

Models API | 200+ AI Models List | LaoZhang API

API Overview

API Information

Get Model List

Request Examples

Response Format

Get Specific Model Information

Request Examples

Response Format

Response Field Descriptions

Major Model Categories

OpenAI Series

Claude Series

Google Gemini Series

Chinese Language Models

Image Generation Models

Text-to-Image

Image Understanding

Audio Models

Text-to-Speech (TTS)

Speech-to-Text (STT)

Usage Recommendations

Select Models by Scenario

Daily Conversations

Code Generation

Complex Reasoning

Chinese Processing

Cost-Performance Selection

Real-time Model Information Retrieval

Error Handling

View Complete Model List

Start Using Chat API

Core APIs

Model Guides

Documentation Index

​API Overview

​API Information

​Get Model List

​Request Examples

​Response Format

​Get Specific Model Information

​Request Examples

​Response Format

​Response Field Descriptions

​Major Model Categories

​OpenAI Series

​Claude Series

​Google Gemini Series

​Chinese Language Models

​Image Generation Models

​Text-to-Image

​Image Understanding

​Audio Models

​Text-to-Speech (TTS)

​Speech-to-Text (STT)

​Usage Recommendations

​Select Models by Scenario

Daily Conversations

Code Generation

Complex Reasoning

Chinese Processing

​Cost-Performance Selection

​Real-time Model Information Retrieval

​Error Handling

View Complete Model List

Start Using Chat API

API Overview

API Information

Get Model List

Request Examples

Response Format

Get Specific Model Information

Request Examples

Response Format

Response Field Descriptions

Major Model Categories

OpenAI Series

Claude Series

Google Gemini Series

Chinese Language Models

Image Generation Models

Text-to-Image

Image Understanding

Audio Models

Text-to-Speech (TTS)

Speech-to-Text (STT)

Usage Recommendations

Select Models by Scenario

Cost-Performance Selection

Real-time Model Information Retrieval

Error Handling