GPT-5.6 Luna vs Kimi K2-Thinking-0905: Specs & Benchmark Comparison
| Characteristic | GPT-5.6 Luna | Kimi K2-Thinking-0905 |
|---|---|---|
| Company | OpenAI | Moonshot AI |
| Release Date | July 9, 2026 | September 4, 2025 |
| Parameters | — | 1.0T |
| Multimodal | Yes | No |
| Context (input) | 1.1M | 262K |
| Context (output) | 128K | 66K |
| Input Price / 1M | $0.20 | $0.60 |
| Output Price / 1M | $1.20 | $2.40 |
| Average Score | 0.5 | 0.9 |
| Benchmarks | ||
| GPQA | 0.9 | 0.8 |
Visual Benchmark Comparison
GPT-5.6 Luna
Kimi K2-Thinking-0905
GPQA0.9 vs 0.8
0.9
0.8
Verdict
GPT-5.6 Luna leads in 3 out of 4 comparison categories.
Overall Performance
Both models show comparable average scores: GPT-5.6 Luna — 0.5, Kimi K2-Thinking-0905 — 0.9.
API Cost
GPT-5.6 Luna is 2.1x cheaper: input $0.20/1M vs $0.60/1M tokens.
Context Window
GPT-5.6 Luna supports a larger context: 1M vs 262K tokens.
Recency
GPT-5.6 Luna is newer: released 7/9/2026 vs 9/4/2025.
More About These Models
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Frequently Asked Questions
Which is better for coding — GPT-5.6 Luna or Kimi K2-Thinking-0905?
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 Kimi K2-Thinking-0905?
GPT-5.6 Luna is cheaper for input: $0.20 per 1M tokens vs $0.60.
Which has a larger context window — GPT-5.6 Luna or Kimi K2-Thinking-0905?
GPT-5.6 Luna supports a larger context: 1,050,000 tokens vs 262,144.
The GPT-5.6 Luna and Kimi K2-Thinking-0905 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 Kimi K2-Thinking-0905 page. See also the complete list of AI model comparisons.