Seedance 2.0 is here - create consistent, multimodal AI videos faster with images, videos, and audio in one prompt.

GPT-5.1-Codex-Max

gpt-5.1-codex-maxopenaiClosed Source Model$5.625000 / call

GPT-5.1-Codex-Max

Choose a prompt below to get started or type your own message

Related Models

Discover similar models you might be interested in

View all LLM Models

Qwen3 8B

Closed Source Model

TNG: DeepSeek R1T2 Chimera

Closed Source Model

Upstage: Solar Pro 3

Closed Source Model

Qwen: Qwen3 VL 30B A3B Instruct

Closed Source Model

Meta Llama 3 70B Instruct Turbo

Closed Source Model

LiquidAI: LFM2-24B-A2B

Closed Source Model

Qwen: Qwen3 VL 32B Instruct

Closed Source Model

Llama 4 Maverick Instruct (17Bx128E)

Closed Source Model

GLM 5.1 FP4

Closed Source Model

Gemma 4 26B A4b It

Closed Source Model

Qwen2.5 3B Instruct

Closed Source Model

Arcee AI: Trinity Large Preview

Closed Source Model

Meta: Llama 3.2 3B Instruct

Closed Source Model

Qwen: Qwen3 Next 80B A3B Instruct

Closed Source Model

nim/meta/llama-3.2-90b-vision-instruct

Closed Source Model

Google: Gemma 4 26B A4B (free)

Closed Source Model

Qwen2.5 72B

Closed Source Model

GPT-5

GPT-5

Closed Source Model

About GPT-5.1-Codex-Max

Agentic coding assistant for large codebases: speeds multi-file refactors, supports streaming, function-calls, image I/O, long-context compaction, and repo-aware testing (high-accuracy, lower token use).

Technical Specifications

Model ID: gpt-5.1-codex-max
Category: LLM Models
Task: Text Generation
Price: $5.625000 per million tokens
Added: December 11, 2025

Key Features

Chat completion and multi-turn conversation API
Streaming response with token-by-token output
Function calling and tool use support
System prompts and role-based messaging
JSON mode and structured output

Quick Start

Integrate GPT-5.1-Codex-Max into your application with a single API call. Get your API key from the pricing page to get started.

import requests
import json

url = "https://modelslab.com/api/v7/llm/chat/completions"

headers = {
    "Content-Type": "application/json"
}

data = {
        "model_id": "gpt-5.1-codex-max",
        "messages": [
            {
                "role": "user",
                "content": "Hello!"
            }
        ],
        "max_tokens": 1000,
        "key": "YOUR_API_KEY"
    }

try:
    response = requests.post(url, headers=headers, json=data)
    response.raise_for_status()  # Raises an HTTPError for bad responses (4XX or 5XX)
    result = response.json()
    print("API Response:")
    print(json.dumps(result, indent=2))
except requests.exceptions.HTTPError as http_err:
    print(f"HTTP error occurred: {http_err} - {response.text}")
except Exception as err:
    print(f"Other error occurred: {err}")

View the full API documentation for SDKs, code examples in Python, JavaScript, and more.

Pricing

GPT-5.1-Codex-Max API costs $5.625000 per million tokens. Pay only for what you use with no minimum commitments. View pricing plans

Use Cases

AI chatbots and virtual assistants
Code generation and developer tools
Content writing and copywriting automation
Data analysis, summarization, and extraction

Learn more about GPT-5.1-Codex-Max Browse LLM Models More from Openai View Pricing

GPT-5.1-Codex-Max FAQ