GPT-5.6 Terra vs Kimi K2.6
Both are Mid-tier models, from OpenAI and Moonshot AI respectively. Kimi K2.6 is the cheaper choice overall at a 4:1 input:output ratio.
Which is cheaper
Side by side
| Spec | GPT-5.6 Terra | Kimi K2.6 |
|---|---|---|
| Provider | OpenAI | Moonshot AI |
| Tier | Mid | Mid |
| Context window | 1.05M | 262K |
| Max output | 128K | — |
| Input $/1M | $2.00 | $0.95 |
| Output $/1M | $12.00 | $4.00 |
| Cache read $/1M | $0.20 | $0.16 |
| Cache write $/1M | $2.50 | — |
| Modalities | text, image | text |
GPT-5.6 Terra. One flat rate: unlike Sol and Cyber, Terra has no long-context surcharge tier on the pricing page.
Kimi K2.6. input is cache-miss (standard) price per 1M tokens; cache_read is cache-hit price ($0.16).
Sources
GPT-5.6 Terra — verified August 29, 2026
Kimi K2.6 — verified August 29, 2026
Full GPT-5.6 Terra pricing page → · Full Kimi K2.6 pricing page →