# google/or-tools

Google's Operations Research tools:

Repository: https://github.com/google/or-tools
Canonical: https://ross.abutalabs.com/products/or-tools
Homepage: https://developers.google.com/optimization/
Language: C++
License: Apache-2.0
License Family: permissive
Topics: combinatorial-optimization, linear-programming, operations-research, optimization, or-tools
Last push: 2026-08-26T22:06:03+00:00

## Health v2 (maintenance only)
Score: 79/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 41, longevity 100
- inputs: {"age_days": 4212, "days_push": 7, "days_rel": 233, "gap_med": 132.5, "n_releases_24m": 5}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 13946, forks 2471 (observed 2026-08-28T04:11:05.142307+00:00)

## What it is
Google's open-source Operations Research suite for combinatorial optimization, written in C++ with wrappers for Python, C#, and Java. It includes constraint programming solvers (CP-SAT), linear programming solvers (Glop, PDLP), and algorithms for routing, bin packing, flows, and assignment problems.

## Use cases
- solve vehicle routing problems
- solve linear and integer programming models
- schedule employees or tasks with constraint programming
- solve bin packing and knapsack problems
- compute shortest paths and max flow in graphs
- model and solve assignment problems
- use CP-SAT to solve constraint satisfaction problems

## When to choose
- you need a fast, proven optimization solver suite with multi-language bindings
- you are solving routing, scheduling, packing, or flow problems
- you want a free alternative to commercial solvers like CPLEX or Gurobi, or a wrapper to use them interchangeably

## When to avoid
- you need general-purpose numerical linear algebra rather than discrete optimization
- you need a lightweight dependency for simple math operations
- your problem is small enough that a simple heuristic suffices

## Facets
- artifact type: library
- maturity: stable
- function: math, simulation, developer-tools
- domain: mathematics, logistics, data-science
- platform: cpp, python, jvm, dotnet, cross-platform
- tags: optimization, constraint-programming, linear-programming, vehicle-routing, combinatorial-optimization, operations-research, cp-sat, graph-algorithms, bin-packing, algorithms

## Member repositories
- google/or-tools (main) score 79

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:05.142307+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:12:55.904307+00:00, confidence not recorded.
  - readme: https://github.com/google/or-tools (fetched 2026-08-28T04:11:05.142307+00:00, sha 119f3fa91d61)
  - homepage: https://developers.google.com/optimization/ (fetched 2026-08-29T08:06:53.653982+00:00, sha 82f122a80c94)
- Data as of 2026-08-30T08:39:29.467469+00:00.