AI · 2h ago
GPT-5.6 tiers: Terra is the default, Sol for hard reasoning, Luna for volume
OpenAI's GPT-5.6 launches as three tiers: Sol ($5/$30 per million tokens), Terra ($2.50/$15), and Luna ($1/$6). Terra hits 97% of Sol's benchmark performance, making it the practical default for most dev tasks. Luna excels in bulk operations and latency-sensitive apps, while Sol is reserved for complex reasoning where error cost outweighs token price.
Meridian48 take
The tier breakdown is useful, but the real story is predictable caching at 10% input cost, which can dramatically alter cost calculations for prefix-heavy workloads like RAG.
Read the full reporting
GPT-5.6 Sol vs Terra vs Luna: which tier should you actually use? →
DEV Community
gpt-5.6openai-pricing