Source: https://seerepo.com/compare/openai/codex/vs/xai-org/grok-build Markdown source: https://seerepo.com/compare/openai/codex/vs/xai-org/grok-build.md Description: codex and grok-build share 27 technologies: axum, SQLite, Sentry, Tokio, tower, Ratatui, crossterm, ansi-to-tui, oauth2, jsonwebtoken, hmac, rmcp, bm25, image, pulldown-cmark, zip, linkify, quick-xml, schemars, tracing, tracing-subscriber, OpenTelemetry, tracing-opentelemetry, log, opentelemetry-otlp, tracing-appender, and opentelemetry-http. Both are written in Rust. # codex vs grok-build codex and grok-build share 27 technologies: axum, SQLite, Sentry, Tokio, tower, Ratatui, crossterm, ansi-to-tui, oauth2, jsonwebtoken, hmac, rmcp, bm25, image, pulldown-cmark, zip, linkify, quick-xml, schemars, tracing, tracing-subscriber, OpenTelemetry, tracing-opentelemetry, log, opentelemetry-otlp, tracing-appender, and opentelemetry-http. Both are written in Rust. - [openai/codex](https://seerepo.com/r/openai/codex): Lightweight coding agent that runs in your terminal - [xai-org/grok-build](https://seerepo.com/r/xai-org/grok-build): SpaceXAI's coding agent harness and TUI. Fullscreen, mouse interactive, extensible. ## What they share and what sets them apart - In common: axum, SQLite, Sentry, Tokio, tower, Ratatui, crossterm, ansi-to-tui, oauth2, jsonwebtoken, hmac, rmcp, bm25, image, pulldown-cmark, zip, linkify, quick-xml, schemars, tracing, tracing-subscriber, OpenTelemetry, tracing-opentelemetry, log, opentelemetry-otlp, tracing-appender, opentelemetry-http - Only in codex: codex-attachment-store, codex-cloud-tasks-client, codex-queue-extension, codex-thread-store, codex-utils-cache, sqlx-sqlite, sqlx, libsqlite3-sys, lru, rama-http, rama-core, tiny_http, rama-http-backend, objc2-app-kit, objc2-foundation, two-face, codex-tui, ratatui-macros, sqlx-macros, codex-aws-auth, codex-keyring-store, codex-login, codex-user-verification, codex-websocket-auth, codex-workload-identity, keyring, ed25519-dalek, objc2-local-authentication, codex-agent-graph-store, codex-agent-identity, codex-agent-message-board-client, codex-agent-message-board-extension, codex-agent-roles, codex-chatgpt, codex-client, codex-code-mode-runtime, codex-collaboration-mode-templates, codex-context-fragments, codex-core-plugin-common, codex-extension-api, codex-external-agent-migration, codex-guardian-context, codex-guardian-reviewer, codex-image-generation-extension, codex-lmstudio, codex-mcp, codex-mcp-extension, codex-memories-extension, codex-memories-read, codex-memories-write, codex-message-board-mcp, codex-model-provider, codex-model-provider-info, codex-models-manager, codex-ollama, codex-plugin-host, codex-prompts, codex-protocol, codex-response-debug-context, codex-runtime-agent-instance, codex-skills, codex-skills-extension, codex-tools, codex-web-search-extension, openai-codex-cli-bin, codex-mermaid, codex-utils-image, codex-utils-template, png, symphonia, Pydantic, codex-otel-trace-websocket, codex-rollout-trace, tracelogging, opentelemetry-semantic-conventions, opentelemetry-appender-tracing - Only in grok-build: aws-sdk-s3, rusqlite, moka, sqlite-vec, OpenAI, axum-server, anstyle, fontdb, alacritty_terminal, ratatui-core, indicatif, tiny-skia, async-openai, agent-client-protocol, kamadak-exif, minijinja, infer, htmd, html-escape, pdf_oxide, resvg, scraper, jsonschema, prometheus, fastrace-opentelemetry, env_logger, prometheus-parse, tracing-chrome ## Side by side | | codex | grok-build | |---|---|---| | Size | 2,374,591 lines written, 4,286 code files | 1,982,128 lines written, 2,511 code files | | Who writes it | 2.7% of its commits signed by AI. With Codex, Claude Code, and GitHub Copilot | 0% of its commits signed by AI | | Activity | Last push November 9, 2026, 13,317 commits, 133,900 stars | Last push September 29, 2026, 51 commits, 27,712 stars | | Tests | 2,509 test files. 51.9% of its code files have a test that imports them | 1,077 test files. 52.1% of its code files have a test that imports them | - Size: Lines written by people and agents, without generated ones; code files, without tests. - Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch. - Activity: From GitHub and its history, on the day SeeRepo read it. - Tests: The files that test the code, and the share of code files a test imports. ## Frequently asked questions ### Which is bigger, codex or grok-build? codex, with 2,374,591 lines written; grok-build has 1,982,128. The proof: [openai/codex's code at commit 6107b98](https://github.com/openai/codex/tree/6107b9886c114702e5c1cfd1c1b54f7c48bfaf49) ### Which has more GitHub stars, codex or grok-build? codex, with 133,900 stars; grok-build has 27,712. The proof: [openai/codex on GitHub](https://github.com/openai/codex) ### Which has more tests, codex or grok-build? codex, with 2,509 test files; grok-build has 1,077. The proof: [openai/codex's code at commit 6107b98](https://github.com/openai/codex/tree/6107b9886c114702e5c1cfd1c1b54f7c48bfaf49) ### Which was updated more recently, codex or grok-build? codex: its last push was on November 9, 2026, and grok-build's on September 29, 2026. The proof: [openai/codex's commits on GitHub](https://github.com/openai/codex/commits) ### Which has more commits signed by AI, codex or grok-build? codex: an AI signed 2.7% of its commits, with Codex, Claude Code, and GitHub Copilot. The proof: [the commits each tool signed in openai/codex](https://seerepo.com/r/openai/codex/ai) ## Sources - openai/codex: Read on November 9, 2026, at commit 6107b98 (https://github.com/openai/codex/tree/6107b9886c114702e5c1cfd1c1b54f7c48bfaf49) - xai-org/grok-build: Read on November 8, 2026, at commit 2bdd1d6 (https://github.com/xai-org/grok-build/tree/2bdd1d6a6369de0e8c68132ea4539e9abd9e14a8) ## What is your repo built with? Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.