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#103

GPT-6 Luna

OpenAI Release: 2026-09-23 Tested on: 2026-10-01 09:31 openai/gpt-6-luna::medium
~400B total (~17B active)MoEClosedEstimated
(high) (medium) (low) (none)

Summary

GPT-6 Luna scores 8.3 on AI BENCHY and ranks #103. It has 10.0 reliability, a 73.9% pass rate, $0.047 total cost, and 18.07s average response time.

What makes GPT-6 Luna unique: It stands out most in Domain specific, where it ranks #2, while General Intelligence is its weakest area at #17. Its total benchmark cost is unusually low for its score range.

Model facts

Researched on 2026-09-23

Estimated
Parameters
~400B total (~17B active)
Architecture
MoE
Availability
Closed
License
-

Best estimate from public evidence; the vendor did not disclose every value. Vendor does not disclose parameter counts or architecture. Low-confidence catalog estimate carries forward the prior openai/gpt-5.6-luna family estimate; the linked announcement establishes identity and availability, not these counts.

Parameter source Availability source

Score

8.3

Consistency

8.9

Reliability

10.0

Total Cost (Current Price)

$0.047

Total Output Tokens

53,161

Total Input Tokens

203,193

Input Price

$0.100 / 1M

Output Price

$0.500 / 1M

Cache Read Price

$0.010 / 1M

Cache Write Price

$0.125 / 1M

Cache prices apply to input tokens. Reads reuse cached prompts; writes store them and can cost extra. Output tokens use the output price.

Tests Correct

Wrong Tests: 8

Attempt pass rate: 73.9%

Flaky tests

3

Flaky tests had mixed outcomes across runs (at least one pass and one fail).

Response Time (avg)

18.07s

Response Time (max): 66.44s

Response Time (total): 415.53s

Wrong answer: 7 Did not follow instructions: 1

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#103 GPT-6 Luna

medium
Cost
$0.002
Time
23.6s
Tokens
2,966 tok

Price History

Historical pricing data for this model from OpenRouter.

Date Input Price Output Price Cache Read Price Cache Write Price
2026-10-01 18:33 $0.100 / 1M $0.500 / 1M $0.010 / 1M $0.125 / 1M

Charts

Choose the first model, then click a second model to open a side-by-side page.

Total Output Tokens

Score vs Total Output Tokens

Quick Compare

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Category Breakdown

Category Score Consistency Tests Correct
Agentic 10.0 10.0
Anti-AI Tricks 8.3 10.0
Coding 6.6 4.6
Combined 10.0 10.0
Data parsing and extraction 10.0 10.0
Domain specific 5.9 7.2
General Intelligence 4.4 9.9
Instructions following 9.8 10.0
Puzzle Solving 7.7 10.0
Tool Calling 10.0 10.0
Trivia 3.0 10.0

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