SYS://REGISTRY
LEDGER/OpenAI/gpt-5-6
DATASHEET
OpenAI/RELEASED Aug 5, 2026

ChatGPT 5.6

SOL · TERRA · LUNA

OpenAI's unified ChatGPT 5.6 family in three personalities — Sol (deep-reasoning flagship), Terra (balanced everyday), and Luna (high-throughput speed) — each also available as Pro. One 1.05M-context foundation with multi-agent orchestration; Luna tier serves streaming completions from $0.20/M.

Context
1,050,000 tokens
Architecture
Unified Reasoning × 3 Personalities
Official API (1M)
$3 in / $12 out
License
Proprietary API / ChatGPT Plus & Pro
Verified Benchmark Suite
SWE-BENCH
76.8%
MMLU-PRO
86.4%
Quickstart Snippet
curl -s https://modelregistry.tirup.in/api/cli?model=gpt-5-6