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#328

GPT-6 Luna

OpenAI Release: 2026-09-23 Tested on: 2026-09-30 23:16 openai/gpt-6-luna::none
~400B total (~17B active)MoEClosedEstimated
(high) (medium) (low) (none)

Summary

GPT-6 Luna scores 5.5 on AI BENCHY and ranks #328. It has 9.9 reliability, a 40.6% pass rate, $0.026 total cost, and 20.48s average response time.

What makes GPT-6 Luna unique: It stands out most in Combined, where it ranks #3, while Data parsing and extraction is its weakest area at #14.

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

5.5

Consistency

8.2

Reliability

9.9

Total Cost (Current Price)

$0.026

Total Output Tokens

6,855

Total Input Tokens

222,357

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: 16

Attempt pass rate: 40.6%

Flaky tests

5

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

Response Time (avg)

20.48s

Response Time (max): 98.62s

Response Time (total): 470.96s

Wrong answer: 13 API error: 1 Invalid tool call: 1 No answer: 1

Hamster playing table tennis

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

#328 GPT-6 Luna

none
Cost
$0.002
Time
26.0s
Tokens
3,235 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 5.0 10.0
Anti-AI Tricks 4.8 10.0
Coding 5.5 10.0
Combined 3.8 5.8
Data parsing and extraction 7.3 5.9
Domain specific 5.3 7.2
General Intelligence 5.1 10.0
Instructions following 6.2 5.8
Puzzle Solving 5.4 7.2
Tool Calling 10.0 10.0
Trivia 3.0 10.0

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