The Nox model family
The Nox 2 generation launched on September 23, 2026: Orion 2 upgrades the flagship, Orion Flash 2 is the new fast Orion, Vela 2 is the everyday model, and 1.3 Astra remains unchanged.
Nox Orion 2 leads the current model family as the upgrade to 1.4 Orion — faster, more accurate, and lower priced — with Orion Flash 2 as the fast Orion (a 300B model with full thinking depth), 1.3 Astra for deep reasoning, and Vela 2 as the everyday model, more accurate than every previous Vela. Officially launched Voice 1 Advance brings spoken conversation that begins in under two seconds to every plan, while the catalogue preserves retired models — including Nox Light 1.1, Nox Agent 1.2, and Nox Thinking 1.1 — clearly marked with their availability.
Models
Nox Orion 2 (Flagship)
The upgrade to 1.4 Orion — faster, more accurate, lower cost
Orion 2 is the direct upgrade to 1.4 Orion and the flagship of the Nox 2 generation. It keeps everything 1.4 Orion could do — the same tools, thinking levels, and answer standard — while responding faster overall, answering more accurately, and costing less. Under the hood it is an 824-billion-parameter mixture-of-experts model, 46 billion active per token, with a roughly one-million-token context window. It reasons through a deliberate internal pass before answering and sizes each answer to the question, up to 9,000 characters.
Available in Plan mode on Pro and MAX.
Nox Orion Flash 2 (New)
The fast Orion — full thinking depth, 300B model
Orion Flash 2 is the fast version of Orion. It is a 300-billion-parameter model built for speed that keeps Orion's thinking depth intact, running the same deliberate reasoning pass while answering faster and consuming less included usage than Orion 2.
Available in Plan mode on Pro and MAX.
Nox 1.3 Astra (Deep reasoning)
Deep reasoning with a one-million-token context
1.3 Astra is the deep-reasoning model of the Nox 1.3 generation. It is a 700-billion-parameter mixture-of-experts reasoning engine that activates 36.9 billion parameters per token, reads a context window of roughly one million tokens, and runs a deliberate reasoning pass before every answer.
Available on MAX.
Nox Vela 2
The fast model on every plan — now more accurate
Vela 2 is the everyday model of the Nox family and the one available on every plan, including Free. It builds on every previous Vela generation with higher accuracy at the same speed. It runs on a 30-billion-parameter hybrid mixture-of-experts engine that activates 3 billion parameters per token.
Available on every plan, including Free.
Nox 1.4 Orion (Retired)
Retired — the flagship of the Nox 1.4 generation
1.4 Orion was the first model of the Nox 1.4 generation: an 824-billion-parameter mixture-of-experts model, 46 billion active per token, with a roughly one-million-token context window. It reasoned through a deliberate internal pass before answering and sized each answer to the question, up to 9,000 characters. It is no longer selectable under this name; Nox Orion 2 is its successor.
Retired — succeeded by Nox Orion 2.
Nox 1.3 Nova (Retired)
Retired — the balanced model of the 1.3 family
1.3 Nova sat directly below Astra in the Nox 1.3 family. It was a hybrid-reasoning model: it decided per question whether to run a step-by-step reasoning pass or answer directly, which kept replies conversational in speed while staying structured in substance. It is no longer part of the active lineup; Nox Vela 2 and Nox Orion 2 cover its range.
Retired — no longer part of the active lineup.
Nox 1.3 Vela (Retired)
Retired — the fast model of the 1.3 family
1.3 Vela was the everyday model of the Nox 1.3 family and available on every plan, including Free. It ran on a 30-billion-parameter hybrid Mamba-Transformer mixture-of-experts engine that activated 3 billion parameters per token. Nox Vela 2 replaced it on September 23, 2026.
Retired — succeeded by Nox Vela 2.
Nox Light 1.1 (Retired)
Retired — Nox's previous-generation fast model
Light 1.1 was the previous-generation model behind everyday Nox conversations, tuned for low latency and concise answers. It was retired from Nox consumer products on September 23, 2026. Nox Vela 2 is its successor, while Light remains available to developers through the Nox developer API.
Retired from consumer products. Nox Vela 2 is its successor; Light remains available through the Nox developer API.
Nox Agent 1.2 (Retired)
Retired — Nox's former dedicated research mode
Nox Agent 1.2 was the dedicated research mode in Nox. It planned multi-step research runs and returned answers with cited resource cards. The research mode was discontinued on September 23, 2026; Plan mode with live web access is now the way to get cited research.
Retired on September 23, 2026. No longer available; use Plan mode with live web access for cited research.
Nox Voice 1 Advance
Officially launched spoken Nox — live on every plan
Nox Voice 1 Advance is Nox's officially launched spoken conversation system. It keeps the simplicity of a phone call while preserving a written record in Nox: speak, receive a focused reply in under two seconds, and return to the same chat thread whenever you need it.
Available on every plan. Free includes one 1-minute Voice Advance session per UTC day.
More about Nox Voice 1 Advance
Nox Voice 1.2 (Beta)
Talk to Nox in real time
Nox Voice 1.2 (beta) is the family's real-time speech model, built on leading conversational voice AI technology. It runs a live, low-latency speech loop: spoken input in, natural spoken answers out, with the full exchange transcribed into the chat thread as it happens.
Available on MAX. Currently in beta.
Nox Thinking 1.1 (Retired)
Retired — Nox's first dedicated reasoning model
Nox Thinking 1.1 was the Nox 1.1 generation's dedicated reasoning model. It ran a deliberate reasoning pass before answering, trading speed for more structured, multi-step responses. It was retired in July 2026 and is no longer available.
Retired in July 2026. No longer available.