I tested GPT-5.6 Sol, Luna, and Terra across 4 different agent harnesses. @techfren
I tested GPT-5.6 Sol, Luna, and Terra across 4 different agent harnesses. @techfren
Uploaded July 2026 | Updated September 2026, 2 weeks ago
I tested GPT-5.6 Sol, Luna, and Terra across 4 different agent harnesses.

First challenge: build a chess agent under 50 KB. Five tries per combo. All on high reasoning.

Pi + Luna took first.
Codex CLI + GPT-5.6 Sol came dead last 👀

Next: a long-running agent challenge on my remote M4 MacBook. What should I make them build?

#AIAgents #CodingAgents #AIEvals #BuildInPublic
I tested GPT-5.6 Sol, Luna, and Terra across 4 different agent harnesses.Skills can replace 80% of MCP serversSubagents are actually good nowI Used 26.4 Billion Tokens in CodexCodex Needs This Voice Agent ShortcutAn $80 Reset on My $200 ChatGPT Plan: Worth It?I Used DeepWiki to Check an AI Tool’s FeaturesHorizon Alpha | Aider polyglot benchmark (AFK)
Tech Friend AJ |

I tested GPT-5.6 Sol, Luna, and Terra across 4 different agent harnesses.

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