Blog
GPT-5.6 Sol & Codex API guides
Migration tutorials, Cursor setup, and pricing explainers for teams moving to flat OpenAI-compatible API access.
Troubleshooting
Codex CLI Custom Base URL Troubleshooting Guide
Fix Codex CLI custom base URL, API key, /v1/models, model ID, retry, timeout, and OpenAI-compatible provider issues before a long agent run.
9 min read - Updated 2026-07-22
API checklist
OpenAI-Compatible API Pre-Buy Verification Checklist
A practical pre-buy checklist for testing /models, chat, embeddings, images, custom base URLs, model IDs, retries, and concurrency before choosing a provider.
7 min read - Updated 2026-07-22
API checklist
OpenAI-Compatible API Provider Checklist for Coding Agents
A practical checklist for testing custom base URLs, model IDs, chat/completions, embeddings, image generation, retries, and concurrency before using any OpenAI-compatible provider.
8 min read - Updated 2026-07-22
Migration
How to Migrate from OpenAI API to unlimitedcodex
Keep OpenAI-compatible SDK code, change the base URL and API key, and use the exact model ID delivered for the purchased unlimitedcodex package.
6 min read - Updated 2026-07-22
Integrations
Point Cursor at a Custom OpenAI-Compatible Base URL
Configure Cursor with the delivered unlimitedcodex base URL, API key, and exact model ID for the purchased GPT-5.5 XHigh or GPT-5.6 Sol Weekly or Monthly package.
5 min read - Updated 2026-07-22
Pricing
GPT-5.6 Sol API Pricing: Per-Token vs Flat Access
OpenAI Codex pricing vs flat packages: compare metered billing with unlimitedcodex XHigh and Sol access for heavy GPT-5.6 Sol and Codex usage.
7 min read - Updated 2026-07-22