OpenAI · Released 2026-09-22

GPT-6 Luna

A GPT-6 model for focused, high-volume tasks. Its max-setting text index and dedicated Decisions endpoint have separate scopes, prices and output types.

Original model explanation ↗

Where it stands in the leaderboard

Artificial Analysis intelligence comparison

38points

Intelligence Index

Rank 17 among included models

Test configuration: max

Source read · · v4.3.2

Each model uses its highest tested setting on the source page, with fallback conditions retained; scores come from one evaluator. The index mainly evaluates English text tasks; examine Chinese and image capabilities separately.

Source evaluation & rankings ↗

Evaluations: conditions and results

How this capability connects to works and uses

OpenAI model evolution

  1. GPT-6 Astra

    GPT-6's complex-work model connects understanding, tool use and file delivery.

    Original release ↗
  2. GPT-6 Sol / Luna

    Sol and Luna join the GPT-6 family with different capability and cost trade-offs.

    Original release ↗
  3. GPT-6 Sol → GPT-6.1 Sol

    Sol advances to 6.1, with reported gains in coding, computer use and professional work.

    Original release ↗
  4. GPT-6 Luna · Decisions API beta

    The same Luna model gains a dedicated endpoint for predicates, choices and scores; this is API access, not a separate set of model weights.

    Original release ↗
  5. GPT-6.1 Sol · Ultrafast

    The same Sol model gains an API speed tier; its capability version and board identity remain, with separate cost and product-access conditions.

    Original release ↗