⚡ Stop treating intelligence and efficiency as separate. GPT-5.6 maximizes intelligence per token to deliver equal-or-better performance more cheaply and quickly.
Title: How GPT-5.6 fuses frontier intelligence with frontier efficiency
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⚡ Overview
GPT-5.6 is trained to optimize both task success and efficiency, taking a more direct path through tasks. OpenAI calls it their greatest intelligence-per-token efficiency yet.
🧩 Problem Solved
Frontier models are smart, but reasoning tokens, latency, and cost are the wall in production. GPT-5.6 makes efficiency a first-class goal, pushing the performance-vs-cost tradeoff outward.
🛠 Methodology & Lineup
・Sol: flagship for frontier reasoning and long-horizon agentic work
・Terra: everyday balanced model, GPT-5.5-competitive at about half the cost
・Luna: fastest and cheapest (~80% less than Sol)
On serving: improved speculative decoding gives 15%+ better token generation, and GPU kernel improvements cut serving cost 20%.
📊 Results
On the Artificial Analysis Coding Agent Index, Sol (max reasoning) sets a new SOTA of 80, beating Fable 5 by +2.8 while using under half the output tokens, half the time, and ~1/3 less cost. On ExploitBench it matches Mythos Preview using ~1/3 of the output tokens.
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