Project AURIONAI Use-Cases Research & Innovation
LLM

GPT-5.5

OpenAI GPT-5.x model, GA in GitHub Copilot.

OpenAIOpenAIUSAGPT-5Family
OpenAI
Levelmodel
ClassLLM
Parametersnot in the notes
Context1,000,000
Released23 Apr 2026
Opennessproprietary
Runs onnot in the notes
Statusactive

Benchmark Results

vendor-reported
BenchLM long-context compositelong context
Composite of vendor-reported scoresvendor-reported
85.3
04590

Score in index. Higher is better.

rank 1, BenchLM aggregator, top score10 Oct 2026 benchlm.ai
FinanceBenchdomain
Aggregator score, not comparable to paper setup; not independently confirmedvendor-reported
91
050100

Score in %. Higher is better.

rank 114 Aug 2026 capitalandcompute.net
SWE-bench Procoding
vendor-reported
58.6
050100

Score in %. Higher is better.

rits.shanghai.nyu.edu
Terminal-Bench 2.0agents and tool use
vendor-reported
82.7
050100

Score in %. Higher is better.

rits.shanghai.nyu.edu
vendor-reported
82
050100

Score in %. Higher is better.

rank 1, BenchLM aggregator, top score10 Oct 2026 benchlm.ai
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

successor
GPT-5.2 to GPT-5.4: successor, medium confidenceGPT-5.4 to GPT-5.5: successor, medium confidenceGPT-5.5 to GPT-5.6 Sol: successor, medium confidenceGPT-5.6 Sol to GPT-6 Astra: successor, medium confidenceGPT-5.2GPT-5.2OpenAIGPT-5.4GPT-5.4OpenAIGPT-5.5GPT-5.5OpenAI, Apr 2026GPT-5.6 SolGPT-5.6 SolOpenAI, Jul 2026GPT-6 AstraGPT-6 AstraOpenAI, Sep 2026
OpenAIGPT-5.4 is the parent (successor)medium confidencenotes
OpenAIGPT-5.6 Sol is a child (successor)medium confidencenotes
Where 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, 5 models. Confidence and evidence are the notes' own.

Industry Use Cases

Finance
Financial document QA
Healthcare
Ambient clinical scribing

R&D Topics

Frontier pretraining scalingproduced by

Identity

Developer
OpenAI
Family
GPT-5
Released
23 Apr 2026 sourcessecondary report
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 Not disclosed
Total parameters
– sources
Active parameters
–
Checkpoint parameters
–
Context length
1,000,000 tokens
Input
text
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
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. OpenAI Releases GPT-5.5: Agentic Coding Ceiling Tops 14 Benchmarks rits.shanghai.nyu.edu https://rits.shanghai.nyu.edu/ai/openai-releases-gpt-5-5-agentic-coding-ceiling-tops-14-benchmarks/
  2. Supported AI models in GitHub Copilot - GitHub Docs docs.github.com https://docs.github.com/en/copilot/reference/ai-models/supported-models
  3. Terminal-Bench 2.0 Leaderboard & Scores , October 2026 benchlm.ai https://www.benchlm.ai/benchmarks/terminal-bench-2
  4. Best Long Context AI Models (October 2026) , Ranked by Benchmark Data benchlm.ai https://benchlm.ai/best/long-context
  5. Generative AI for Clinical Conversations | Abridge abridge.com https://www.abridge.com/
  6. FinanceBench: 81% of Answers Were Wrong capitalandcompute.net https://capitalandcompute.net/ai-benchmarks/financebench/

To cite this page: Project AURION, AI Use-Cases Research & Innovation, "GPT-5.5", https://aurion.semai.id/models/openai-gpt-5-5/, records of October 2026.