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OpenAIAILLMBenchmarks

GPT-5.6's Three Tiers: Sol, Terra, and Luna, Simply Explained

OpenAI split GPT-5.5 into three models instead of shipping one bigger one. Simply explained: what Sol, Terra, and Luna actually are, what they cost, what's genuinely new, and which one you should reach for.

July 2, 2026
6 min read
CodexOpenAIAIDeveloper Tools

Why Would I Choose Codex?

OpenAI's Codex CLI brings terminal-native agentic coding with multimodal input and sandboxed execution to developers already living in the OpenAI ecosystem.

March 26, 2026
10 min read