Status: [LIVE]

Endpoints found:
https://chatgpt.com/api/auth/session](https://chatgpt
https://chatgpt.com/api/auth/session](https://chatgpt.com/api/auth/session

Source: https://github.com/emiliancristea/chat2api

# CHAT2API: 2026 High-Performance Text-to-API Proxy

A high-performance local proxy converting **ChatGPT Web (Plus/Pro)** sessions into standard **OpenAI v1 Compatible REST & Streaming APIs** (`/v1/chat/completions`, `/v1/models`).

Updated and locked for the **2026 OpenAI Frontier Lineup**: **GPT-5.6 Sol**, **GPT-5.6 Instant**, **GPT-5.6 Thinking (Extended/High)**, **GPT-5.6 Luna**, and **Deep Research**.

All legacy models (GPT-3.5, GPT-4, GPT-4o, o1-preview) have been purged.

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## Quick Reference

| Parameter | Value |
| :--- | :--- |
| **Local Base URL** | `http://127.0.0.1:5005/v1` |
| **Master Authorization Key** | `Bearer sk-chat2api-local` |
| **Token Storage** | `data/token.txt` |
| **Detailed Specification** | [TEXT_TO_API_SPEC.md](TEXT_TO_API_SPEC.md) |

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## Active 2026 Model Catalog

| Exposed Model ID | Target Backend Slug | Thinking Effort | Purpose & Best Use |
| :--- | :--- | :--- | :--- |
| **`gpt-5.6`** *(Default)* | `gpt-5-6` | *Auto* | **GPT-5.6 Sol**: Flagship auto model. Best balance of speed and intelligence. |
| **`gpt-5.6-sol`** | `gpt-5-6` | *Auto* | Explicit alias for Sol. |
| **`gpt-5.6-instant`** | `gpt-5-6-instant` | *None* | Zero-delay Sol. Fast streaming and rapid chat. |
| **`gpt-5.6-thinking`** | `gpt-5-6-thinking` | `standard` | Balanced reasoning effort. |
| **`gpt-5.6-medium`** | `gpt-5-6-thinking` | `standard` | Alias for standard reasoning effort. |
| **`gpt-5.6-high`** | `gpt-5-6-thinking` | `extended` | **Maximum Thinking Budget**. Deep reasoning for difficult coding and architecture. |
| **`gpt-5.6-luna`** | `gpt-5-6-t-mini` | *Built-in* | **GPT-5.6 Luna Thinking Mini**. Compact, high-speed reasoning. |
| **`gpt-5.6-mini`** | `gpt-5-6-t-mini` | *Built-in* | Alias for Luna Thinking Mini. |
| **`deep-research`** | `research` | *Autonomous* | **Deep Research Agent**. Multi-minute recursive web searching and comprehensive report synthesis. |
| **`research`** | `research` | *Autonomous* | Alias for Deep Research. |
| **`g