Comparison
CodeGen vs CodeT5
Verdict
Pick CodeGen if codeGen is a series of open-source large language models designed for program synthesis. Trained on TPUs, CodeGen offers several versions with varying capabilities from basic code generation to advanced infill sampling; pick CodeT5 if codeT5, an open-source LLM for code understanding and generation under BSD-3-Clause license.
Markdown twin · CodeGen alternatives · CodeT5 alternatives
GraphCanon updated 3w
Trust & integrity
| Signal | CodeGen | CodeT5 |
|---|---|---|
| Maintenance | Steady (60d since push) As of 3w · github_public_v1 | Archived (38d since push) As of 3w · github_public_v1 |
| Provenance | Not a fork · Organization account As of 3w · github_public_v1 | Not a fork · Organization account As of 3w · github_public_v1 |
| OSV dependency advisories | No lockfile (source not queried) As of 1mo · osv@v1 | No lockfile (source not queried) As of 1mo · osv@v1 |
| deps.dev advisories | Not queried deps.dev@v1 | Not queried deps.dev@v1 |
| OpenSSF Scorecard | Not queried openssf-scorecard@v1 | Not queried openssf-scorecard@v1 |
Tagline
- CodeGen
- Family of open-source models for program synthesis.
- CodeT5
- Home of CodeT5: Open Code LLMs for Code Understanding and Generation
Stars
- CodeGen
- 5.2k
- CodeT5
- 3.1k
Forks
- CodeGen
- 421
- CodeT5
- 487
Open issues
- CodeGen
- 48
- CodeT5
- 88
Language
- CodeGen
- Python
- CodeT5
- Python
Adopt for
- CodeGen
- CodeGen is a series of open-source large language models designed for program synthesis. Trained on TPUs, CodeGen offers several versions with varying capabilities from basic code generation to advanced infill sampling.
- CodeT5
- CodeT5, an open-source LLM for code understanding and generation under BSD-3-Clause license.
Persona
- CodeGen
- -
- CodeT5
- -
Runtime
- CodeGen
- -
- CodeT5
- -
License
- CodeGen
- Apache-2.0
- CodeT5
- BSD-3-Clause
Last pushed
- CodeGen
- Jun 2, 2026
- CodeT5
- Jun 25, 2026
Categories
- CodeGen
- LLM Frameworks, Model Training
- CodeT5
- Developer Tools, LLM Frameworks
Trust and health
Maintenance
- CodeGen
- Steady (60%)
- CodeT5
- Archived (8%)
Days since push
- CodeGen
- 60d
- CodeT5
- 38d
Archived on GitHub
- CodeGen
- No
- CodeT5
- Yes
Open issues (now)
- CodeGen
- 48
- CodeT5
- 88
Full report
- CodeGen
- Trust report
- CodeT5
- Trust report
Choose CodeGen if…
- License: CodeGen is Apache-2.0, CodeT5 is BSD-3-Clause.
- Tags unique to CodeGen: codex, generativemodel, languagemodel, llm.
- Also covers Model Training.
- When you require high-performance model training and code generation that matches or exceeds the performance of OpenAI Codex on specific tasks
When NOT to use CodeGen
- In scenarios where the model's primary use is not centered around code generation or program synthesis, as its specialized training may limit its effectiveness for other types of generative tasks
- If your project strictly requires a smaller memory footprint or simpler deployment because advanced models like CodeGen2.5 require significant computational resources and setup
Choose CodeT5 if…
- License: CodeT5 is BSD-3-Clause, CodeGen is Apache-2.0.
- Tags unique to CodeT5: code generation, code-intelligence, code-understanding, language-model.
- Also covers Developer Tools.
- When focusing on Python projects needing advanced code understanding or generation.
When NOT to use CodeT5
- If the project requires proprietary licensing protection, given its open-source nature under BSD-3-Clause.
- Avoid if real-time performance is a crucial requirement since LLMs typically lag in speed.
Explore
Sources
Every stat on this page traces to a dated GitHub sync, license file, enrichment field, or trust scan.
- GitHub stars (salesforce/CodeGen) · observed Aug 2, 2026
- GitHub forks (salesforce/CodeGen) · observed Aug 2, 2026
- Last push (salesforce/CodeGen) · observed Jun 2, 2026
- License file (Apache-2.0) · observed Aug 2, 2026
- Decision facts (enrichment) · observed Jul 12, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
- GitHub stars (salesforce/CodeT5) · observed Aug 2, 2026
- GitHub forks (salesforce/CodeT5) · observed Aug 2, 2026
- Last push (salesforce/CodeT5) · observed Jun 25, 2026
- License file (BSD-3-Clause) · observed Aug 2, 2026
- Decision facts (enrichment) · observed Jul 17, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
GitHub stars on cards: CodeGen 5.2k · CodeT5 3.1k (synced Aug 2, 2026).
Common questions
- What is the difference between CodeGen and CodeT5?
- CodeGen: Family of open-source models for program synthesis.. CodeT5: Home of CodeT5: Open Code LLMs for Code Understanding and Generation. See the comparison table for live GitHub stats and shared categories.
- When should I choose CodeGen over CodeT5?
- Choose CodeGen over CodeT5 when License: CodeGen is Apache-2.0, CodeT5 is BSD-3-Clause; Tags unique to CodeGen: codex, generativemodel, languagemodel, llm; Also covers Model Training; When you require high-performance model training and code generation that matches or exceeds the performance of OpenAI Codex on specific tasks.
- When should I choose CodeT5 over CodeGen?
- Choose CodeT5 over CodeGen when License: CodeT5 is BSD-3-Clause, CodeGen is Apache-2.0; Tags unique to CodeT5: code generation, code-intelligence, code-understanding, language-model; Also covers Developer Tools; When focusing on Python projects needing advanced code understanding or generation.
- When should I avoid CodeGen?
- In scenarios where the model's primary use is not centered around code generation or program synthesis, as its specialized training may limit its effectiveness for other types of generative tasks If your project strictly requires a smaller memory footprint or simpler deployment because advanced models like CodeGen2.5 require significant computational resources and setup
- When should I avoid CodeT5?
- If the project requires proprietary licensing protection, given its open-source nature under BSD-3-Clause. Avoid if real-time performance is a crucial requirement since LLMs typically lag in speed.
- Is CodeGen or CodeT5 more popular on GitHub?
- CodeGen has more GitHub stars (5,179 vs 3,098). Stars measure visibility, not whether either tool fits your constraints.
- Are CodeGen and CodeT5 open source?
- Yes - both are open-source projects on GitHub (CodeGen: Apache-2.0, CodeT5: BSD-3-Clause).
- Where can I find alternatives to CodeGen or CodeT5?
- GraphCanon lists graph-backed alternatives at CodeGen alternatives and CodeT5 alternatives (CodeGen markdown twin, CodeT5 markdown twin), ranked by typed relationship edges rather than popularity votes.
- Is there a machine-readable version of this comparison?
- Yes. The markdown twin at this comparison mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers.
- Which is better maintained, CodeGen or CodeT5?
- CodeGen: Steady. CodeT5: Archived. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance.
- Where are the full trust reports for CodeGen and CodeT5?
- GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: CodeGen trust report; CodeT5 trust report.