Want Claude to review every pull request in your repo automatically? With Cody it takes about five minutes and requires no hosting — just a GitHub Actions workflow and your Anthropic API key. Here's the full setup.
Cody now supports both Anthropic's Claude and OpenAI's GPT-5 family for automated pull request reviews. So which model should be reviewing your code? Here's a practical comparison — and since Cody lets you switch with a single environment variable, you can easily try both on your own pull requests.
Cody has always made AI code review on GitHub free and effortless. Today we're bringing the same reviews to the other two platforms teams ask for most: GitLab merge requests and Azure DevOps pull requests. It's called Cody Pro.
Big news: Cody, the free AI code reviewer for GitHub, now supports Anthropic's Claude models alongside OpenAI. You can review every pull request with Claude Opus 4.8, Claude Sonnet 5, or Claude Haiku 4.5 — just bring your Anthropic API key.
We’re excited to announce that CodyLabs, your favorite free and open source AI code reviewer, now fully supports the brand new GPT-5 Codex model from OpenAI for automated code review and summarization!
OpenAI’s GPT-5 Codex brings a new level of intelligence and accuracy to code understanding. CodyLabs now lets you take full advantage of this powerful model for your automated code reviews.
It’s simple—just set the OPENAI_MODEL environment variable to gpt-5-codex in your workflow. For example:
- name: Run Code Review Model
run: |
python src/review_pull_request.py ${{ github.event.pull_request.number }} ${{ github.repository }} > ${{ github.workspace }}/output.txt
env:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
# Use the new GPT-5 Codex model
OPENAI_MODEL: "gpt-5-codex"
You can also choose any other model from the OpenAI model list if you prefer.
CodyLabs is the go-to solution for developers searching for a free, open source, AI-powered code review tool. Whether you want the best free AI code reviewer, an open source alternative to commercial tools, or to try GPT-5 Codex for code review, CodyLabs has you covered.
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We’re thrilled to announce that CodyLabs, the free and open source AI code reviewer, now uses OpenAI’s brand new GPT-5 model as its default engine for code review and summarization!
OpenAI has just released GPT-5, the most advanced language model yet, offering even deeper code understanding, smarter suggestions, and more accurate reviews. CodyLabs instantly integrates these improvements, giving you the best possible automated code review experience.
Ready to try the best free open source AI code reviewer?
CodyLabs is the go-to solution for developers searching for a free, open source, AI-powered code review tool. Whether you’re looking for the best free AI code reviewer, an open source alternative to commercial tools, or just want to try GPT-5 for code review, CodyLabs has you covered.
Keywords: free open source AI code reviewer, best free AI code review, open source GPT-5 code review, automated code review, GitHub Actions, GitLab pipelines, CodyLabs, GPT5, AI code review tool, open source AI tools, 2025