LLM
GPT-5.1
OpenAI flagship GPT-5 family model for coding and agentic tasks with configurable reasoning effort. OpenAI deprecated it on 1 October 2026 with API removal set for 1 April 2027.
Levelmodel
ClassLLM
Parametersnot in the notes
Context400,000
Released13 Nov 2025
Opennessproprietary
Runs onnot in the notes
Statusdeprecated
Lineage
finetune
GPT-5.1-Codex is a child (finetune)medium confidencemodel cardWhere this comes from
Parent and child relations from model cards, Hugging Face base_model fields and the genealogy tables of the research notes. The tree shows two generations each way, 3 models. Confidence and evidence are the notes' own.
R&D Topics
Identity
Where this comes from
Developer and dates from the research notes. Release date is the vendor's public announcement; weights date is when open weights were published.
Architecture and Size
- Architecture
- not in the notes
- Total parameters
- – sources
- Active parameters
- –
- Checkpoint parameters
- –
- Context length
- 400,000 tokens
- Input
- text, image
- Output
- text
Where this comes from
Parameter counts as the developer states them. Where the checkpoint holds a different total, both are shown (register A16).
Openness and Access
- Openness
- proprietary
- Licence
- Proprietary sources
- Access routes
- API
Where this comes from
The licence file governs over registry tags and aggregator labels.
Deployment
- Runs on
- not in the notes
- Footprint
- 128,000 max output tokens; knowledge cutoff Sep 30, 2024; reasoning effort none, low, medium or high
- Runtimes
- not in the notes
Where this comes from
Deployment tiers and runtimes as named in the notes. Footprint is the notes' figure, not a measurement by AURION.
Indonesia
- Indonesian support
- not stated
- Regional languages
- not in the notes
- Jakarta hosting
- unknown
- Languages
- not in the notes
Where this comes from
Indonesia fields are carried on every model; unknown is an allowed value.
Benchmark Results
The notes record no benchmark result for this model.
Industry Use Cases
No industry use case links this model.
Links
DeveloperOpenAIfrontier lab, USA
OpenAIfrontier lab, USAModelGPT-5.1OpenAI, LLM
GPT-5.1OpenAI, LLMUse CasesIndustrial Copilots and Maintenance AssistantsIndustrialClinical LLM (Frontier Proprietary)HealthcarePharma Documents, Regulatory and Life-Science R&DHealthcareAmbient Clinical ScribingHealthcare+4 moreUse cases of models in the same R&D topic; none is recorded for this model itself.
Who Runs It
PT Pertamina Geothermal EnergyIn production, 14 Jul 2026
PT Amman Mineral Nusa Tenggara (AMMAN)In production, 8 Jul 2026
Banner HealthIn production, 11 Jan 2026CommureIn production, 11 Jan 2026+45 moreDeployments of these use cases; none names this model.
PT Pertamina Geothermal EnergyIn production, 14 Jul 2026PT Amman Mineral Nusa Tenggara (AMMAN)In production, 8 Jul 2026Banner HealthIn production, 11 Jan 2026CommureIn production, 11 Jan 2026+45 moreDeployments of these use cases; none names this model.Organisations 1
R&D topics 3
Frontier Pretraining ScalingTraining a new base model at or near the top-5 compute of its release date (Epoch's front…produced byReasoning via Large-Scale RLReinforcement learning on outcomes, often verifiable math or code, to produce long reason…produced byAgents and Tool UseSystems that plan, call tools and act over multi-step tasks.produced by
Sources
- developers.openai.com/api/docs/models/gpt-5.1.md https://developers.openai.com/api/docs/models/gpt-5.1.md
- developers.openai.com/api/docs/changelog.md https://developers.openai.com/api/docs/changelog.md
- developers.openai.com/api/docs/deprecations.md https://developers.openai.com/api/docs/deprecations.md
To cite this page: Project AURION, AI Use-Cases Research & Innovation, "GPT-5.1", https://aurion.semai.id/models/openai-gpt-5-1/, records of October 2026.