BREAKING
OpenAI Previews GPT-5.6 Series
Three Tiers: Sol, Terra, Luna
Sol
Flagship
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Coding and science
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Long-horizon agentic work
Terra
Balanced
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GPT-5.5-level quality
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About 2x lower cost
Terminal-Bench 2.1 Scores
Sol Ultra
91.9
Sol
88.8
Claude Mythos 5
88
GPT-5.5
83.4
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$/M in
Input tokens
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$/M out
Output tokens
0
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Context window
Sol Refactors 15,000-Line Codebase
1
Analyze 15K-line code
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2
Identify 47 fixes
↓
3
Implement in one session
Wider Access In Coming Weeks
AI NEWS BLITZ
OpenAI has launched a limited preview of its new GPT-5.6 model series.