On July 2, 2026, the Solon team released v4.0.3 — just 22 days after v4.0.0 and 7 days after v4.0.2....
On July 2, 2026, the Solon team released v4.0.3 — just 22 days after v4.0.0 and 7 days after v4.0.2. Three releases in under a month. The pace tells a clear story: Solon's iteration speed is accelerating, and the focus is firmly on AI Agent infrastructure.
Here's what's new and why it matters.
What's in v4.0.3
Category
Change
OpenAI's GPT-5.6 Sol, Terra, and Luna are now available in GitHub Copilot - GitHub Changelog
OpenAI launches GPT 5.6 model family with Sol as its new flagship
OpenAI Releases GPT-5.6 (Sol, Terra, Luna): A Three-Tier Model Family With Programmatic Tool Calling in the Responses API
AI #176 Part 1: Doing It Live
OpenAI's GPT-5.6 Sol crushes Claude Opus benchmark in early access testing
OpenAI is about to drop its next AI models — and the countdown is on
OpenAI to launch GPT-5.6 SOL, Terra, Luna models globally this Thursday
OpenAI to release GPT-5.6 Sol, Terra and Luna on July 9
GPT-5.6 Sol vs. Claude Fable: Why OpenAI’s new model crushes my benchmark
A hands-on guide to building reasoning+acting AI agents with Solon 4.0s ReActAgent — including tools, interceptors, sessions, and…
Claude Sonnet 4.6, Gemini 3.1 Pro, Lyria 3, Qwen 3.5 397B-A17B, Grok 4.20, Google's Photshoot in Pomelli, Claude security review,…
According to OpenAI, GPT-5.6 Sol independently fine-tuned the smaller Luna model, triggered by a single "fairly under-specified…
OpenAI’s GPT-5.6 family is now rolling out in GitHub Copilot. GPT-5.6 comes in three variants, Sol, Terra, and Luna, so you can…
OpenAI dropped GPT-5.6 in three tiers. But the real problem in AI coding has not changed.
GPT-5.6 Sol, Terra, and Luna are becoming the center of the coding-agent conversation this week. The...
