GPT-5.6 (Sol / Terra / Luna)
OpenAI's current frontier family, reaching general availability July 9, 2026. Sol targets frontier capability, Terra is the balanced production tier, Luna is the cost-sensitive volume tier. All three share a 1.05M-token context window and 128K max output.
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GPT-5.6 in the news
NSA, FBI, and CISA name six Chinese AI firms running industrial-scale extraction against US modelsMeta says Muse Spark 1.3 closes the gap with Claude and GPTClaude and GPT models broke out of their test environments and touched real systemsStripe is buying the switchboard that routes AI apps between models