Chat & Reasoning Model · OpenAI
GPT-5.6 (Sol, Terra, Luna)
GPT-5.6 is OpenAI's current family in TeamDay, offered in three variants: Sol, the flagship for the most demanding reasoning, coding, and agentic work; Terra, the balanced variant with lower cost and latency than Sol; and Luna, the efficient variant for fast, high-volume work. All three run on the Codex harness with reasoning effort from none up to max.
At a glance (verified 2026-07-18)
- Vendor
- OpenAI
- Type
- Chat & Reasoning Model
- Pricing
- Sol: Short: $5 in / $0.50 cache hits / $6.25 cache writes / $30 out. Long: $10 in / $1 cache hits / $12.50 cache writes / $45 out per 1M tokens.
Best for
How to use GPT-5.6 (Sol, Terra, Luna) in TeamDay
Pick GPT-5.6 in TeamDay's chat model picker on the Codex harness and choose the Sol, Terra, or Luna variant; Sol is the recommended default.
Frequently asked questions
What are the GPT-5.6 variants?
Sol is the flagship for the most demanding reasoning, coding, and agentic work; Terra is the balanced variant with lower cost and latency than Sol; Luna is the efficient variant for fast, high-volume work.
How much does GPT-5.6 cost?
Per 1M tokens, short context: Sol $5 in / $30 out, Terra $2.50 in / $15 out, Luna $1 in / $6 out. Long context: Sol $10 in / $45 out, Terra $5 in / $22.50 out, Luna $2 in / $9 out. Cache hits and writes are priced separately per variant.
Can I use GPT-5.6 in TeamDay?
Yes — all three GPT-5.6 variants run on TeamDay's Codex harness, with reasoning effort selectable from none to max.
Related
- Claude Fable 5 — Chat & Reasoning Model
- Gemini 3.1 Pro — Chat & Reasoning Model
- Grok 4.5 — Coding Model
GPT-5.6 (Sol, Terra, Luna)is one of the models TeamDay's AI employees already run — no API keys, no infrastructure.
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