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#107

GPT-5.6 Luna

OpenAI Release: 2026-07-09 Tested on: 2026-07-09 21:16 openai/gpt-5.6-luna::low
~400B total (~17B active)MoEClosedEstimated
(high) (medium) (low) (none)

Summary

GPT-5.6 Luna scores 6.2 on AI BENCHY and ranks #107. It has 10.0 reliability, a 57.1% pass rate, $0.141 total cost, and 4.35s average response time.

What makes GPT-5.6 Luna unique: It stands out most in Domain specific, where it ranks #4, while Combined is its weakest area at #18. It is notably fast compared with similar models.

Model facts

Researched on 2026-08-12

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 the architecture or count.

Parameter source Availability source

Score

6.2

Consistency

8.5

Reliability

10.0

Total Cost (Current Price)

$0.141

Total Output Tokens

17,681

Total Input Tokens

34,218

Input Price

$1.000 / 1M

Output Price

$6.000 / 1M

Tests Correct

Wrong Tests: 11

Attempt pass rate: 57.1%

Flaky tests

4

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

Response Time (avg)

4.35s

Response Time (max): 18.06s

Response Time (total): 91.45s

Wrong answer: 10 Did not follow instructions: 1

Hamster playing table tennis

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

#107 GPT-5.6 Luna

low
Cost
$0.011
Time
10.2s
Tokens
1,897 tok

Run history

Tested on Score Reliability Tests Correct Total Cost Compare
2026-08-14 02:19 Re-test 6.2 10.0 $0.026 ↓ Compare
2026-07-16 22:37 New test added 6.2 10.0 $0.249 Compare
2026-07-09 21:16 Initial run 6.2 10.0 $0.141 Current run

Price History

Historical pricing data for this model from OpenRouter.

Date Input Price Output Price
2026-07-09 21:18 $1.000 / 1M $6.000 / 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
Anti-AI Tricks 8.3 10.0
Coding 5.5 10.0
Combined 2.8 1.6
Data parsing and extraction 10.0 10.0
Domain specific 3.6 7.2
General Intelligence 5.0 10.0
Instructions following 8.5 6.8
Puzzle Solving 7.6 7.2
Tool Calling 10.0 10.0
Trivia 3.0 10.0

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