OpenAI's flagship September 2026 frontier model with a 1.05M context window, MoE architecture, and SOTA reasoning across coding, formal mathematics, and long-horizon agentic automation.

OpenAI
Hard math, advanced science, and security.
Laboratory Overview
OpenAI is the pioneer of modern large language models, powering GPT-6 Astra, GPT-5.6 Sol, Terra, and Luna. On ARMES, all OpenAI models run via verified Zero Data Retention enterprise pipelines, guaranteeing your reasoning prompts and code remain private.
Strict Zero Data Retention (ZDR): Requests are processed ephemerally in RAM. No user data, prompts, or completions are stored, indexed, or used for model training.
OpenAI Foundation Models (19)
Available under ARMES unified subscription without separate API keys or billing agreements.
OpenAI's most capable model and the top of the GPT-5.6 family (released Jul 2026).
OpenAI's smartest model (released Apr 23, 2026).
GPT-5.4-mini is a high-performance foundation model engineered by OpenAI, accessible with Zero Data Retention on ARMES.
GPT-5.4-nano is a high-performance foundation model engineered by OpenAI, accessible with Zero Data Retention on ARMES.
Conversational AI with dramatically reduced hallucination rates, especially in medicine/law/finance.
PhD-level math, advanced science, security audits, formal proofs
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