- Score
- 5.2 (-0.13 points)
- Total Cost (Current Price)
- $0.004 · 91.8% cheaper
- Response Time (avg)
- 3.40s · 10.0% faster
OpenAI
Release: 2026-07-09
Tested on: 2026-10-01 01:48
openai/gpt-5.6-luna::none
~400B total (~17B active)MoEClosedEstimated
Summary
GPT-5.6 Luna scores 5.3 on AI BENCHY and ranks #297. It has 10.0 reliability, a 34.8% pass rate, $0.042 total cost, and 3.78s average response time.
What makes GPT-5.6 Luna unique: It stands out most in Puzzle Solving, where it ranks #3, while Coding is its weakest area at #12.
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Model facts
Researched on 2026-08-12
- 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.
5.3
Consistency
8.8
10.0
Total Output Tokens
8,000
Total Input Tokens
230,744
Input Price
$0.200 / 1M
Output Price
$1.200 / 1M
Cache Read Price
$0.020 / 1M
Cache Write Price
$0.250 / 1M
Cache prices apply to input tokens. Reads reuse cached prompts; writes store them and can cost extra. Output tokens use the output price.
Flaky tests
3
Flaky tests had mixed outcomes across runs (at least one pass and one fail).
Hamster playing table tennis
Prompt: Create a detailed SVG illustration of a hamster playing table tennis.
#297 GPT-5.6 Luna
none- Cost
- $0.016
- Time
- 15.8s
- Tokens
- 2,685 tok
Run history
| Tested on | Score | Reliability | Tests Correct | Total Cost | Compare |
|---|---|---|---|---|---|
| 2026-10-01 01:48 Re-test | 5.3 | 10.0 | $0.042 ↓ | Current run | |
| 2026-07-16 22:36 New test added | 5.4 | 10.0 | $0.142 | Compare | |
| 2026-07-09 21:15 Initial run | 5.3 | 10.0 | $0.047 | Compare |
This run used a different benchmark suite. Keep suite changes in mind when reading historical movement.
Price History
Historical pricing data for this model from OpenRouter.
| Date | Input Price | Output Price | Cache Read Price | Cache Write Price |
|---|---|---|---|---|
| 2026-07-09 21:18 | $1.000 / 1M | $6.000 / 1M | N/A | N/A |
| 2026-07-28 08:40 | $0.500 / 1M | $3.000 / 1M | N/A | N/A |
| 2026-07-31 10:14 | $0.100 / 1M | $0.601 / 1M | N/A | N/A |
| 2026-08-14 12:51 | $0.100 / 1M | $0.600 / 1M | N/A | N/A |
| 2026-10-01 18:33 | $0.200 / 1M | $1.200 / 1M | $0.020 / 1M | $0.250 / 1M |
Charts
Choose the first model, then click a second model to open a side-by-side page.
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Score vs Total Cost
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Category Breakdown
| Category | Score | Consistency | Tests Correct |
|---|---|---|---|
| Agentic | 5.0 | 10.0 | |
| Anti-AI Tricks | 4.8 | 10.0 | |
| Coding | 3.8 | 7.2 | |
| Combined | 3.2 | 9.1 | |
| Data parsing and extraction | 10.0 | 10.0 | |
| Domain specific | 3.6 | 7.2 | |
| General Intelligence | 5.0 | 10.0 | |
| Instructions following | 7.1 | 5.8 | |
| Puzzle Solving | 5.3 | 10.0 | |
| Tool Calling | 10.0 | 10.0 | |
| Trivia | 3.0 | 10.0 |