Nox Orion Flash 2 (Retired)

Retired fast Orion model · Released in Nox: September 23, 2026 · Page last updated: November 10, 2026

Retired — the first fast Orion, a 300B model

Orion Flash 2 was the first fast version of Orion. It was a 300-billion-parameter model built for speed that kept Orion's thinking depth intact, running the same deliberate reasoning pass while answering faster and consuming less included usage than Orion 2. On October 22, 2026 it was succeeded by Nox Orion Flash 2.1, which moves to a 552-billion-parameter mixture-of-experts engine with native photo input.

Orion Flash 2 was a 300-billion-parameter model that kept Orion's full thinking depth while responding faster and consuming less included usage than Orion 2.

It ran a deliberate internal reasoning pass before answering and supported the same standard thinking controls and answer limits as Orion 2, except Hyper Ultra, which stayed exclusive to Orion 2.

HealthBench Professional: 63.4% raw (95% CI 58.7–67.6) and 57.3% length-adjusted on a Nox self-run of all 525 examples on September 27, 2026 (grader as specified by the benchmark, reasoning effort low). Nox's own measurement; not independently verified.

It carried the Plan mode toolset, including live web access with cited sources.

Nox Orion Flash 2 was retired on October 22, 2026, succeeded by Nox Orion Flash 2.1 on a new 552-billion-parameter mixture-of-experts engine.

Capabilities

• 300-billion-parameter model — Orion's thinking depth at higher speed and lower cost
• Deliberate internal reasoning pass before every answer
• Standard thinking controls and answer limits shared with Orion 2
• Live web access in Plan mode with cited sources

Model details

• Model size — 300 billion parameters
• Reasoning — Deliberate internal reasoning pass before every answer
• HealthBench Professional — 63.4% raw / 57.3% length-adjusted, Nox self-run, all 525 examples, September 27, 2026 — not independently verified
• Thinking levels — Light, Balanced, Extra, Max, and Ultra
• Released — September 23, 2026
• Status — Retired on October 22, 2026 — succeeded by Nox Orion Flash 2.1

Availability: Retired on October 22, 2026 — succeeded by Nox Orion Flash 2.1.

Nox Orion Flash 2 was retired on October 22, 2026. Succeeded by Nox Orion Flash 2.1 (new 552B mixture-of-experts engine, native photo input). Current replacement: Nox Orion Flash 2.1.

Nox Orion Flash 2 — frequently asked questions

What is Nox Orion Flash 2?

Nox Orion Flash 2 was Nox's fast orion model, retired on October 22, 2026. Orion Flash 2 was the first fast version of Orion. It was a 300-billion-parameter model built for speed that kept Orion's thinking depth intact, running the same deliberate reasoning pass while answering faster and consuming less included usage than Orion 2. On October 22, 2026 it was succeeded by Nox Orion Flash 2.1, which moves to a 552-billion-parameter mixture-of-experts engine with native photo input.

What could Nox Orion Flash 2 do?

Nox Orion Flash 2's capabilities: 300-billion-parameter model — Orion's thinking depth at higher speed and lower cost; Deliberate internal reasoning pass before every answer; Standard thinking controls and answer limits shared with Orion 2; Live web access in Plan mode with cited sources.

Which thinking levels did Nox Orion Flash 2 offer?

Thinking levels: Light, Balanced, Extra, Max, and Ultra

Is Nox Orion Flash 2 still available?

No. Nox Orion Flash 2 was retired on October 22, 2026 and is no longer part of the Nox lineup. Succeeded by Nox Orion Flash 2.1 (new 552B mixture-of-experts engine, native photo input).

Related Nox models

• Nox Orion Flash 2.1 — The fast Orion on a new engine — 552B mixture-of-experts, native photo input
• Nox GHI 1 — The officially released model system that powers Pebs, Nox's agent
• Nox Orion 2.5 — The new flagship — workspace tools built in, health research tools, and a staged review at Ultra
• Nox Orion Flash 2.5 — The fast Orion 2.5 — native photo input, workspace tools built in, and the same review at Ultra
• Nox Orion 2.6 Cyber Preview — A dedicated security model for defensive and authorized security work — hardened against misuse and prompt injection
• Nox Orion 2.1 — The Nox 2.1 flagship, with a peer-review answer pipeline
• Nox Orion 2.1 Pro — Visualize your body: 3D models, code, and MP4 video
• Nox Vela 2.5 — The fast everyday model on every plan — now reads images
• Nox Voice 2 — The most powerful Nox voice yet — expressive, interruptible, Plan mode in the call

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