Data points: 184
Model compare
GPT-5.6 Luna vs GPT-5.6 Terra
The readout for GPT-5.6 Luna and GPT-5.6 Terra, before the detailed comparison sheet.
Key Takeaways
Weighted outcome: GPT-5.6 Terra. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
GPT-5.6 Terra
GPT-5.6 Terra has the higher weighted result; Model A / B score 10 to 90.
Evidence depth
184 data points
Includes 59 benchmark rows, 0 audit samples, and 10 provider examples.
Selection signal
Start with GPT-5.6 Terra
The charts below split 69 high-signal samples across speed, scores, and audit health.
Change comparison
Switch either side of this report to compare another model with the same LMSpeed data pipeline.
Select a different model to open a new comparison URL.
Comparison sheet
This report only uses LMSpeed data for GPT-5.6 Luna and GPT-5.6 Terra: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-5.6 Luna | GPT-5.6 Terra |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 10.0 pts | 90.0 pts |
| Benchmark category leads | 0 categories | 6 categories |
| Operational advantages | Cheapest input price, Average speed | First-token latency, Provider coverage |
| Context window | 1.1M tokens | 1.1M tokens |
| Max output | 128K tokens | 128K tokens |
| Modalities | Input FileImageText Output Text | Input FileImageText Output Text |
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
The overall result weights benchmark capability categories at 80% and price, API speed/latency, and availability at 20%. Recent test volume does not affect the winner, and missing benchmark categories are excluded.
Model metadata
Model metadata
| Model compare | GPT-5.6 Luna | GPT-5.6 Terra |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Released | Jul 2026 | Jul 2026 |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | 2026-02-16 | 2026-02-16 |
| OpenRouter ID | openai/gpt-5.6-luna | openai/gpt-5.6-terra |
| References | No data | No data |
When to choose each model
This report only uses LMSpeed data for GPT-5.6 Luna and GPT-5.6 Terra: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-5.6 Luna
GPT-5.6 Luna has these operational advantages: Cheapest input price, Average speed.
GPT-5.6 Terra
GPT-5.6 Terra is stronger in benchmark categories (Agents, Coding, Reasoning, Knowledge, Math) and operational dimensions (First-token latency, Provider coverage).
Benchmark score comparison
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
Category performance
Compare benchmark category scores on a 0-100 scale. Select a category to inspect the gap.
- Model A coverage
- 6 / 8
- Model B coverage
- 7 / 8
- Shared
- 6 shared categories
Avg. score
GPT-5.6 Luna
56.5
Avg. score
GPT-5.6 Terra
58.5
Agents
GPT-5.6 Terra leads by 4.5
Coding
GPT-5.6 Terra leads by 2.3
Reasoning
GPT-5.6 Terra leads by 4.3
Knowledge
GPT-5.6 Terra leads by 0.5
Math
GPT-5.6 Terra leads by 2.1
Multilingual
No data
Multimodal
GPT-5.6 Terra leads by 4.4
Instruction following
GPT-5.6 Terra
Professional benchmark details
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Professional benchmark details
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-5.6 Luna
67.2
Rank #5/16 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner69.6
Rank #2/16 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
33.2
Rank #3/4 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner52.9
Rank #2/4 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
70.0
Rank #19/100 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner78.0
Rank #8/100 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
89.15 s
Rank #71/74 · confidence 4
GPT-5.6 Terra
winner0.73 s
Rank #14/74 · confidence 4
GPT-5.6 Luna
89.15 s
Rank #73/74 · confidence 4
GPT-5.6 Terra
winner0.73 s
Rank #20/74 · confidence 4
GPT-5.6 Luna
winner138.6 tok/s
Rank #23/74 · confidence 4
GPT-5.6 Terra
86.9 tok/s
Rank #43/74 · confidence 4
GPT-5.6 Luna
winner$0.200/M
Rank #32/179 · confidence 4
GPT-5.6 Terra
$2.00/M
Rank #138/179 · confidence 4
GPT-5.6 Luna
winner$0.450/M
Rank #42/179 · confidence 4
GPT-5.6 Terra
$4.50/M
Rank #147/179 · confidence 4
GPT-5.6 Luna
winner$1.20/M
Rank #48/179 · confidence 4
GPT-5.6 Terra
$12.00/M
Rank #147/179 · confidence 4
GPT-5.6 Luna
20.6
Rank #12/83 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner30.0
Rank #3/83 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
59.5
Rank #11/17 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner83.9
Rank #4/17 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
0.2
Rank #9/11 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner0.8
Rank #4/11 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
78.3
Rank #13/100 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner79.7
Rank #7/100 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
57.8
Rank #23/29 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner83.8
Rank #8/29 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
winner91.1%
Rank #21/211 · confidence 4
GPT-5.6 Terra
74.6%
Rank #120/211 · confidence 4
GPT-5.6 Luna
winner39.5%
Rank #27/208 · confidence 4
GPT-5.6 Terra
11.4%
Rank #108/208 · confidence 4
GPT-5.6 Luna
84.7
Rank #3/33 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner87.4
Rank #2/33 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
80.9
Rank #8/17 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner88.0
Rank #3/17 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
85.5
Rank #6/9 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner87.0
Rank #3/9 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
71.5
Rank #15/70 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner76.7
Rank #4/70 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
55.1
Rank #5/5 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner55.8
Rank #4/5 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
61.1
Rank #9/15 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner64.9
Rank #6/15 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
62.7
Rank #10/49 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner63.4
Rank #8/49 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
52.5
Rank #24/108 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner53.9
Rank #15/108 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
winner52.5%
Rank #21/204 · confidence 4
GPT-5.6 Terra
44.6%
Rank #49/204 · confidence 4
GPT-5.6 Luna
57.5
Rank #37/81 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner58.3
Rank #32/81 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
96.9
Rank #1/62 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
96.9
Rank #1/62 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
78.6
Rank #3/7 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner84.9
Rank #2/7 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
58.5
Rank #3/35 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner68.3
Rank #2/35 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
78.6
Rank #3/47 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner84.9
Rank #2/47 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
32.0
Rank #4/7 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner32.7
Rank #3/7 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
55.7
Rank #5/6 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner57.7
Rank #4/6 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
92.3
Rank #12/31 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner92.9
Rank #7/31 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
winner92.6
Rank #10/101 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
87.9
Rank #26/101 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
81.6
Rank #13/69 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner82.2
Rank #12/69 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
39.5
Rank #25/108 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner42.9
Rank #13/108 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
91.1
Rank #21/108 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner92.5
Rank #14/108 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
51.2
Rank #21/111 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner55.0
Rank #14/111 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
42.7
Rank #25/101 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner46.8
Rank #19/101 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
79.5
Rank #7/9 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner82.0
Rank #5/9 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
78.6
Rank #17/65 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner80.7
Rank #8/65 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
78.4
Rank #17/31 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner80.7
Rank #10/31 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
66.0
Rank #24/44 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner75.3
Rank #12/44 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
40.3
Rank #7/8 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner51.0
Rank #2/8 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
12.4
Rank #4/6 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner23.2
Rank #2/6 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
35.8
Rank #5/23 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner38.9
Rank #3/23 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
77.9
Rank #7/15 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner81.8
Rank #3/15 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
45.6
Rank #5/15 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner50.2
Rank #3/15 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
84.7
Rank #4/53 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner87.4
Rank #3/53 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
85.0
Rank #8/69 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner91.6
Rank #4/69 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
31.1
Rank #11/17 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner40.2
Rank #5/17 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
83.3
Rank #13/31 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner87.5
Rank #6/31 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
14.3
Rank #10/11 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner20.8
Rank #6/11 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
46.9
Rank #15/65 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner50.2
Rank #7/65 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
winner53.4
Rank #7/24 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
53.1
Rank #8/24 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
42.2
Rank #11/16 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner45.6
Rank #8/16 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
winner87.9
Rank #9/14 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
85.2
Rank #11/14 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
1582.0
Rank #11/66 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
winner1583.0
Rank #10/66 · confidence 3 · eval date 2026-07-09
GPT-5.6 Luna
winner53.9
Rank #11/61 · confidence 3 · eval date 2026-07-09
GPT-5.6 Terra
53.8
Rank #12/61 · confidence 3 · eval date 2026-07-09
API audit comparison
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
API audit comparison
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5.6 Luna | GPT-5.6 Terra |
|---|---|---|
| No completed audits are available from shared providers yet. | ||
Provider examples
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
Provider examples
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | GPT-5.6 Luna | GPT-5.6 Terra |
|---|---|---|
OpenCode10 tests | GPT-5.6 Luna speed / latency 2042 tok/s / 2791ms input / output No data | GPT-5.6 Terra speed / latency N/A / N/A input / output No data |
AI Fujcloud5 tests | GPT-5.6 Luna speed / latency 22 tok/s / 18050ms input / output No data | GPT-5.6 Terra speed / latency N/A / N/A input / output No data |
IKunCode5 tests | GPT-5.6 Luna speed / latency 40 tok/s / 13897ms input / output No data | GPT-5.6 Terra speed / latency N/A / N/A input / output No data |
Jasper5 tests | GPT-5.6 Luna speed / latency 56 tok/s / 1492ms input / output No data | GPT-5.6 Terra speed / latency N/A / N/A input / output No data |
S3AI API5 tests | GPT-5.6 Luna speed / latency N/A / N/A input / output No data | GPT-5.6 Terra speed / latency 50 tok/s / 3051ms input / output No data |
GPT-5.6 Luna gpt-5.6-luna speed / latency No data input / output $0/M/$0/M | GPT-5.6 Terra gpt-5.6-terra speed / latency No data input / output $0/M/$0/M | |
GPT-5.6 Luna gpt-5.6-luna speed / latency No data input / output $0/M/$0/M | GPT-5.6 Terra gpt-5.6-terra speed / latency No data input / output $0/M/$0/M | |
GPT-5.6 Luna gpt-5.6-luna speed / latency No data input / output $0/request | GPT-5.6 Terra gpt-5.6-terra speed / latency No data input / output $0/request | |
GPT-5.6 Luna gpt-5.6-luna speed / latency No data input / output $0.0016/M/$0.0094/M | GPT-5.6 Terra gpt-5.6-terra speed / latency No data input / output $0.0039/M/$0.024/M | |
GPT-5.6 Luna gpt-5.6-luna-免费 speed / latency No data input / output $0.0030/request | GPT-5.6 Terra gpt-5.6-terra-免费 speed / latency No data input / output $0.0030/request |
FAQ
Weighted outcome: GPT-5.6 Terra. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
- Why is this comparison indexable?
- It has 6 verifiable comparison points, and both models have pricing or benchmark data.
- Are missing metrics invented?
- No. Metrics without LMSpeed data are omitted from this report.