OpenAI is reshaping the economics of GPT-5.6 by discounting Luna and Terra by large margins to encourage high-volume use, while Sol’s flagship pricing largely remains unchanged, with the option of a new Fast mode for faster processing at a higher cost. The move aims to improve cost efficiency for developers and compete with rivals, signaling a clear tiered pricing strategy that steers workloads toward cheaper tiers for volume but preserves Sol’s premium position for demanding tasks.

Tech· Aug 21, 2026

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GPT-5.6

large language model by OpenAI

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GGPT-5.6· Tech · 7 sources · Aug 21, 2026Story

OpenAI Price Cut for GPT-5.6 Sol APIs

Tech· Aug 21, 2026

Facts from Wikidata (CC0).

GPT-5.6 across IJR

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About GPT-5.6

GPT-5.6 is a set of large language models (LLMs) developed by OpenAI and released on July 9, 2026. It is a family of models that comes in three distinct variants, ranked from least to most capable: Luna, Terra, and Sol. The models were designed to expand user capabilities across enterprise work, coding, scientific research, and cybersecurity.

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