{"slug":"grit","name":"Grit","domain":"grit.io","verdict":"As of 2026-08-08, ChatGPT, Claude, Gemini collectively rank Grit #5 of 8 for ai migration tools for modernizing legacy codebases (one of 2 leaderboards it appears on). Source: https://modelsagree.com/product/grit (modelsagree.com, CC BY 4.0).","best_rank":5,"categories":2,"entries":[{"slug":"best-ai-migration-tools-for-modernizing-legacy-codebases","title":"Best AI migration tools for modernizing legacy codebases","rank":5,"of":8,"score":4,"appearances":1,"modelRanks":{"Gemini":2},"reason":"Integrates AST pattern matching via GritQL with LLM generation to deliver high-speed, syntactically guaranteed framework and language translations (e.g., Python, JS/TS, Terraform); near-tied with Moderne (OpenRewrite), but placed second due to the friction of authoring custom GritQL queries for non-standard codebases.","reasons":[{"model":"Gemini","reason":"Integrates AST pattern matching via GritQL with LLM generation to deliver high-speed, syntactically guaranteed framework and language translations (e.g., Python, JS/TS, Terraform); near-tied with Moderne (OpenRewrite), but placed second due to the friction of authoring custom GritQL queries for non-standard codebases."}],"fixes":[{"model":"Gemini","fix":"Requires learning and writing custom declarative transformation rules for complex internal paradigms, rather than offering fully autonomous end-to-end rewrites out of the box."}],"updated":"2026-08-08","api":"https://modelsagree.com/api/v1/best/best-ai-migration-tools-for-modernizing-legacy-codebases.json"},{"slug":"best-ai-code-migration-tool","title":"Best AI code migration tool","rank":7,"of":13,"score":4,"appearances":1,"modelRanks":{"Gemini":2},"reason":"Combines AST-based pattern matching (via GritQL) with LLMs to generate highly customized, reproducible refactoring pull requests (e.g., JS to TS, React hook migrations) at scale without prompt drift. It is a near-tie with Moderne for JS/TS ecosystems due to its flexibility.","reasons":[{"model":"Gemini","reason":"Combines AST-based pattern matching (via GritQL) with LLMs to generate highly customized, reproducible refactoring pull requests (e.g., JS to TS, React hook migrations) at scale without prompt drift. It is a near-tie with Moderne for JS/TS ecosystems due to its flexibility."}],"fixes":[{"model":"Gemini","fix":"Developer onboarding is hindered by a steep learning curve for the proprietary GritQL syntax, and its generative AI engine struggles with high-level architectural transformations that cannot be cleanly mapped to syntax trees."}],"updated":"2026-07-13","rank_history":{"days":["2026-07-11","2026-07-12","2026-07-13"],"ranks":[5,5,6]},"api":"https://modelsagree.com/api/v1/best/best-ai-code-migration-tool.json"}],"page":"https://modelsagree.com/product/grit","check":"https://modelsagree.com/check?q=Grit","updated":"2026-08-10T18:18:45.051Z","attribution":"modelsagree.com, CC BY 4.0"}