codex-with-chatgpt alternatives

XiaoDuoYa/codex-with-chatgpt (7.4k stars, +56 this week): ChatGPT thinks. Codex works. Use ChatGPT as the planning brain while keeping the Codex harness. Why it matters: useful plumbing for shipping LLM-powered features.

Below are 12 other LLM tooling repos tracked by OSS Radar that share at least two GitHub topics with codex-with-chatgpt, ordered by how many topics overlap, then by stars gained in the last 7 days. Topic overlap means a similar problem space, not a drop-in replacement, so check each project's README.

1. 1. NousResearch/hermes-agent

   +714/wkest.

   The agent that grows with you. Why it matters: useful plumbing for shipping LLM-powered features.

   254k stars · Python · shared topics: ai-agents, chatgpt, codex

2. 2. diegosouzapw/OmniRoute

   +658/wkest.

   Never stop coding. Free MIT AI gateway: one endpoint, 359 providers (150+ free), 1200+ models Kimi, Claude, GPT, Gemini, GLM, DeepSeek… Why it matters: useful plumbing for shipping LLM-powered features.

   76k stars · TypeScript · shared topics: ai-agents, codex, mcp

3. 3. Graphify-Labs/graphify

   +455/wkest.

   Turn any codebase, with its docs, SQL schemas, configs, and PDFs, into a queryable knowledge graph. Why it matters: useful plumbing for shipping LLM-powered features.

   126k stars · Python · shared topics: ai-agents, codex, mcp

4. 4. miuuyy/codex-chatgpt-web

   +196/wkest.

   Use ChatGPT Web (including Pro) as a native model in Codex — with context, tools, streaming and images, without using Codex quota. Why it matters: useful plumbing for shipping LLM-powered features.

   14k stars · TypeScript · shared topics: chatgpt, codex, mcp

5. 5. trailhq/Trail-Code

   +133/wkest.

   Turbocharge Claude Code, Cursor, Codex, Gemini & every coding agent: faster, cheaper, with contextual understanding specific to your… Why it matters: useful plumbing for shipping LLM-powered features.

   10k stars · TypeScript · shared topics: ai-agents, codex, mcp

6. 6. decolua/9router

   +98/wkest.

   Unlimited FREE AI coding. Connect Claude Code, Codex, Cursor, Cline, Copilot, Antigravity to FREE Claude/GPT/Gemini via 40+ providers. Why it matters: useful plumbing for shipping LLM-powered features.

   31k stars · JavaScript · shared topics: ai-agents, chatgpt, codex

7. 7. asgeirtj/system_prompts_leaks

   +91/wkest.

   Documented system prompts from Anthropic - Claude Fable 5.1, Opus 5.5, Claude Design, Claude Code. OpenAI - ChatGPT GPT-6-Astra, Codex. Why it matters: useful plumbing for shipping LLM-powered features.

   70k stars · Python · shared topics: ai-agents, chatgpt, codex

8. 8. code-yeongyu/oh-my-openagent

   +77/wkest.

   OmO: Just type "mass ulw" keyword with your prompt. Now you are the master of graph engineering. Why it matters: useful plumbing for shipping LLM-powered features.

   70k stars · TypeScript · shared topics: ai-agents, chatgpt, codex

9. 9. affaan-m/ECC

   +1.3k/wkest.

   The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code… Why it matters: useful plumbing for shipping LLM-powered features.

   279k stars · JavaScript · shared topics: ai-agents, mcp

10. 10. rohitg00/ai-engineering-from-scratch

    +1.1k/wkest.

    Learn AI Engineering! Learn it. Build it. Ship it for others. Why it matters: useful plumbing for shipping LLM-powered features.

    69k stars · Python · shared topics: ai-agents, mcp

11. 11. elie222/rakazo

    +245/wkest.

    Open-source Grok Bot alternative. Choose your own model and sandbox. Why it matters: useful plumbing for shipping LLM-powered features.

    3.9k stars · TypeScript · shared topics: ai-agents, chatgpt

12. 12. langchain-ai/langchain

    +182/wkest.

    The agent engineering platform. Why it matters: useful plumbing for shipping LLM-powered features.

    148k stars · Python · shared topics: ai-agents, chatgpt

More: all trending LLM tooling repos · compare codex-with-chatgpt with the top 2