← All models

OpenAI: GPT-6 Luna

OpenAI

balanced

Capabilities

VisionToolsStructured OutputExtended ThinkingLong Context

Strengths

  • Massive 1M token context window for long documents
  • Strong vision and multimodal capabilities
  • Extended thinking and structured output support
  • Excellent cost-efficiency for balanced tier
  • Tools and agentic workflow integration

Weaknesses

  • Proprietary weights and methodology limit transparency
  • Speed score very low (0.08); inference latency likely high
  • Limited public sustainability and energy data
  • Analyse and reasoning tasks below balanced-tier average
  • Closed-source restricts self-hosting and data control

Pricing

Input / 1M tokens

$0.09999999999999999

Output / 1M tokens

$0.5

Context window

1,050k

Transparency

Open weights

0.0 / 10

Open training data

0.0 / 10

Open methodology

2.5 / 10

Licence openness

1.0 / 10

Provider disclosure

3.5 / 10

FMTI company score

N/A

Composite:3.5 / 10

Closed-source model with limited public methodology disclosure. OpenAI publishes high-level capability reports but does not share training data, weights, or detailed architecture. Transparency baseline reflects industry-standard proprietary practices.

Sustainability

Inference energy

N/A

Training footprint

N/A

Provider infrastructure

6.0 / 10

Composite:5.0 / 10

OpenAI operates distributed infrastructure but does not publicly commit to renewable energy targets or publish detailed carbon metrics. Smaller model variant (Luna vs. Sol) likely has lower per-inference energy than flagship, but overall sustainability posture remains opaque.

Task Fitness

question answering
55%
code
68%
mathematics
50%
business communication
50%
vision
70%
analysis
55%
extraction
78%
long-form generation
72%
research
50%
reasoning
55%
summarisation
75%
translation
71%
conversation
76%