OpenAI Releases GPT-5.6 (Sol, Terra, Luna): A Three-Tier Model Family With Programmatic Tool Calling in the Responses API
MarkTechPost
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OpenAI moved GPT-5. 6 to general availability on July 9, 2026, shipping three tiers instead of one model. Sol is $5/$30 per 1M tokens, Terra is $2. 50/$15, and Luna is $1/$6. Sol sets the Artificial Analysis Coding Agent Index at 80, 2. 8 points above Claude Fable 5, and reaches 62. 6% on OSWorld 2.
OpenAI moved GPT-5. 6 to general availability on July 9, 2026, shipping three tiers instead of one model. Sol is $5/$30 per 1M tokens, Terra is $2. 50/$15, and Luna is $1/$6. Sol sets the Artificial Analysis Coding Agent Index at 80, 2. 8 points above Claude Fable 5, and reaches 62. 6% on OSWorld 2.
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Original source: MarkTechPost