GPT-5.6 Luna vs Inkling-Small: Specs & Benchmark Comparison
| Characteristic | GPT-5.6 Luna | Inkling-Small |
|---|---|---|
| Company | OpenAI | Thinking Machines Lab |
| Release Date | July 9, 2026 | July 30, 2026 |
| Parameters | — | 276B |
| Multimodal | Yes | Yes |
| Context (input) | 1.1M | 256K |
| Context (output) | 128K | 256K |
| Input Price / 1M | $0.20 | $0.30 |
| Output Price / 1M | $1.20 | $1.20 |
| Average Score | 0.5 | 0.6 |
| Benchmarks | ||
| Terminal-Bench 2.1 | 0.8 | 0.6 |
| Artificial Analysis | 0.5 | 0.4 |
| SWE-Bench Pro | 0.6 | 0.6 |
| BrowseComp | 0.8 | 0.8 |
| MMMU-Pro | 0.8 | 0.7 |
| GPQA | 0.9 | 0.9 |
| Toolathlon | 0.5 | 0.5 |
Visual Benchmark Comparison
GPT-5.6 Luna
Inkling-Small
Terminal-Bench 2.10.8 vs 0.6
0.8
0.6
Artificial Analysis0.5 vs 0.4
0.5
0.4
SWE-Bench Pro0.6 vs 0.6
0.6
0.6
BrowseComp0.8 vs 0.8
0.8
0.8
MMMU-Pro0.8 vs 0.7
0.8
0.7
GPQA0.9 vs 0.9
0.9
0.9
Toolathlon0.5 vs 0.5
0.5
0.5
Verdict
GPT-5.6 Luna leads in 2 out of 4 comparison categories.
Overall Performance
Both models show comparable average scores: GPT-5.6 Luna — 0.5, Inkling-Small — 0.6.
API Cost
GPT-5.6 Luna is 1.1x cheaper: input $0.20/1M vs $0.30/1M tokens.
Context Window
GPT-5.6 Luna supports a larger context: 1M vs 256K tokens.
Recency
Inkling-Small is newer: released 7/30/2026 vs 7/9/2026.
More About These Models
Related Comparisons
Frequently Asked Questions
Which is better for coding — GPT-5.6 Luna or Inkling-Small?
Direct comparison on the SWE-Bench benchmark is not available. We recommend reviewing other metrics on the comparison page.
Which model is cheaper — GPT-5.6 Luna or Inkling-Small?
GPT-5.6 Luna is cheaper for input: $0.20 per 1M tokens vs $0.30.
Which has a larger context window — GPT-5.6 Luna or Inkling-Small?
GPT-5.6 Luna supports a larger context: 1,050,000 tokens vs 256,000.
The GPT-5.6 Luna and Inkling-Small comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the GPT-5.6 Luna or Inkling-Small page. See also the complete list of AI model comparisons.