Project AURIONAI Use-Cases Research & Innovation
LLMfamily

GPT-5

OpenAI's GPT-5.x line (GPT-5.2, 5.4, 5.5, 5.6 and Codex variants), predecessor of GPT-6.

OpenAIOpenAIUSA
OpenAI
Levelfamily
ClassLLM
Parametersnot in the notes
Contextnot in the notes
Released7 Aug 2025
Opennessproprietary
Runs onnot in the notes
Statusactive

Benchmark Results

vendor-reported
HealthBench Harddomain
vendor-reported
46.2
050100

Score in %. Higher is better.

7 Aug 2025 openai.com
Where this comes from
Every score names who ran it: vendor-reported, maintainer-run or independent. A rank is shown with the population it was ranked in (gap rule 3).

Lineage

202520262027GPT-5 nanoGPT-5 nano, Aug 2025GPT-5 proGPT-5 pro, Oct 2025GPT-5.1GPT-5.1, Nov 2025GPT-5.1-Codex, Nov 2025GPT-5.1-Codex-Mini, Nov 2025GPT-5.1-Codex-MaxGPT-5.1-Codex-Max, Dec 2025GPT-5.3-CodexGPT-5.3-Codex, Feb 2026GPT-5.5GPT-5.5, Apr 2026GPT-5.6 LunaGPT-5.6 Luna, Jul 2026GPT-5.6 Sol, Jul 2026GPT-5.6 Terra, Jul 2026

5 members have no release date in the notes, so they are not on this timeline.

OpenAIGPT-5.6 Luna belongs to this familyLLM9 Jul 2026
OpenAIGPT-5.6 Sol belongs to this familyLLM9 Jul 2026
OpenAIGPT-5.6 Terra belongs to this familyLLM9 Jul 2026
OpenAIGPT-5.5 belongs to this familyLLM23 Apr 2026
OpenAIGPT-5.3-Codex belongs to this familycode5 Feb 2026
OpenAIGPT-5.1-Codex-Max belongs to this familycode4 Dec 2025
OpenAIGPT-5.1 belongs to this familyLLM13 Nov 2025
OpenAIGPT-5.1-Codex belongs to this familycode13 Nov 2025
OpenAIGPT-5.1-Codex-Mini belongs to this familycode13 Nov 2025
OpenAIGPT-5 pro belongs to this familyreasoning6 Oct 2025
OpenAIGPT-5 nano belongs to this familyreasoning7 Aug 2025
OpenAIGPT-5 mini belongs to this familyLLM
OpenAIGPT-5.2 belongs to this familyLLM
OpenAIGPT-5.2-Codex belongs to this familycode
OpenAIGPT-5.4 belongs to this familyLLM
OpenAIGPT-5.6 Cyber belongs to this familyLLM
Where this comes from
Parent and child relations from model cards, Hugging Face base_model fields and the genealogy tables of the research notes. Confidence and evidence are the notes' own.

Industry Use Cases

Healthcare
Clinical LLM (frontier proprietary)
Industrial
Industrial copilots and maintenance assistants

R&D Topics

Frontier pretraining scalingproduced by

Identity

Developer
OpenAI
Family
not in the notes
Released
7 Aug 2025 sourcesannouncement page
Weights published
–
Record checked
10 Oct 2026
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
not in the notes
Input
not in the notes
Output
not in the notes
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, consumer app
Where this comes from
The licence file governs over registry tags and aggregator labels.

Deployment

Runs on
not in the notes
Footprint
not in the notes
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.

Sources

  1. Models | OpenAI API developers.openai.com https://developers.openai.com/api/docs/models
  2. GPT-5.6 Release: Pricing, ChatGPT Work, and the Codex Merger heyuan110.com https://www.heyuan110.com/posts/ai/2026-07-10-gpt-5-6-general-availability/
  3. openai.com/index/introducing-gpt-5 https://openai.com/index/introducing-gpt-5/
  4. Cognite Atlas AI Industrial SLM & LLM Benchmark Report | Cognite cognite.com https://cognite.com/en/atlas-ai-slm-llm-benchmark-report
  5. developers.openai.com/api/docs/models/gpt-5 https://developers.openai.com/api/docs/models/gpt-5

To cite this page: Project AURION, AI Use-Cases Research & Innovation, "GPT-5", https://aurion.semai.id/models/openai-gpt-5/, records of October 2026.