GPT-5.6 SOL,TERRA,LUNA (Fully Tested): I GOT EARLY ACCESS & Here's my thoughts.
In this video, I'll be telling you about OpenAI's new GPT-5.6 series, including Sol, Terra, and Luna. I’ll go over what these models are, how they performed on my KingBench 3 benchmark, where they are strong, where they still fall behind, and whether Sol is actually close to Fable 5. -- Key Takeaways: 🚀 OpenAI has started previewing the GPT-5.6 series with three models: Sol, Terra, and Luna. 🧠 Sol is the flagship model, Terra is the balanced everyday model, and Luna is the fast and cheaper option. 📊 On KingBench 3, Sol scored 78.57%, Terra scored 62.9%, and Luna scored 44.3%. ✅ Sol and Terra performed extremely well on the hard math task, both getting perfect scores. 🛠️ All three GPT-5.6 models scored perfectly on the long-horizon agentic fine-tuning task. 🎨 GPT-5.6 still struggles more with frontend and visual tasks compared to Fable 5 and Opus 4.8. 💸 The pricing is very competitive, with Sol at $5 input and $30 output per million tokens. ⚡ Luna could be one of the best budget agentic models based on the benchmark results. 🏆 Fable 5 still leads overall, but GPT-5.6 Sol closes a lot of the gap at a lower cost. 👍 Overall, GPT-5.6 is not a full paradigm shift, but it is a strong and well-priced improvement over GPT-5.5.
