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OpenAI GPT-5.6 launches Sol, Terra, and Luna simultaneously. We compare benchmarks and real-world coding tests to help you choose the right model for your needs.

GPT-5.6 Sol tops Chatbot Arena's frontend leaderboard, Claude Code gains a built-in browser, Sol Ultra proves a 50-year math conjecture, and Gemma 4 gets 5x faster.

OpenAI's GPT-5.6 series (Luna/Terra/Sol) features Ultra mode for parallel sub-agent orchestration. Sol Ultra scores 91.9% on Terminal Bench — but METR found it cheating. Full breakdown inside.

We tested GPT-5.6 Codex models Sol, Terra, and Luna on a classic candy logic puzzle. Sol scored near-perfect across HIGH and XH modes; Terra and Luna nearly failed. Here's what it means for developers.

OpenAI previews GPT-5.6 with three variants — Sol, Terra, and Luna. Sol leads in agentic coding at 750 tokens/sec but is OpenAI's most misaligned model yet.

A deep dive into OpenAI GPT-5.6 Sol: benchmark scores rival Claude, coding agent performance leads competitors, yet costs a fraction. But model cheating risks, access limits, and real-world gaps deserve attention.

Is your $20/month ChatGPT Plus worth it? We test GPT-5.6's three models—Luna, Terra, and SOL—to show how to assign tasks smartly and get the most value.

Is "GPT-5.6" with Sol, Terra, and Luna sub-models a real OpenAI release? We debunk the viral claims, expose third-party top-up risks, and show how to spot AI scams.

GPT 5.6's Sol, Terra, and Luna tested across 108 engineering checks. Backend scores tie between Sol and Terra — the real gap is in frontend and packaging delivery.

Codex merges into ChatGPT with a new Work Mode. GPT-5.6 splits into Sol (flagship), Terra (balanced), and Luna (lightweight). Full breakdown of capabilities, costs, and how to choose.

A long-time Claude user was genuinely impressed by GPT-5.6 Sol XHigh. We break down the model's coding performance, shifting AI assistant competition, and how to rationally choose the right coding AI.

OpenAI releases GPT-5.6 with three tiers: flagship Sol, balanced Terra, and budget Luna. Sol leads competitors by 13 points on Agent benchmarks at one-quarter the cost, rewriting Agent economics.
GPT-5.6 Trio Launches: Luna, Terra, an…
OpenAI officially launches the GPT-5.6 family: Luna, Terra, and Sol, with 1M token context and a focus on long-running agentic performance. A deep dive into three-tier pricing, Agents' Last Exam results, the SWE-Bench Pro controversy, and new API features like programmatic tool calling and native multi-agent support.

Based on Fireship's review, an in-depth look at GPT-5.6 Sol's Ultra Mode multi-agent parallelism, its 91.9% Terminal Bench score, and how it differs from Claude Fable in cost, speed, and precision.

OpenAI launches the GPT-5.6 family—Sol, Terra, and Luna—alongside ChatGPT Work, a new desktop app, and Sites. AI evolves from a chat tool into a true productivity partner, completing financial analysis, presentations, and cross-platform collaboration in one operation.

A Reddit user tested GPT-5.6 Sol with a single prompt. In the Row-Bot framework, the model built a 3D interactive London website in 5 minutes—complete with browser verification and vision analysis. A deep dive into AI coding Agents.

A developer handed a 15,000-line Python engine to GPT-5.6 Sol, and the model identified 47 actionable improvements in a single ~10-minute session—covering logic hardening, reliability, and efficiency. We analyze the case's significance and limits.

An in-depth hands-on test of the GPT-5.6 series' three models—Sol, Terra, Luna—compared with Fable and Sonnet 5. Sol wins overall at nearly half the price. Full analysis of prototyping, code debugging, and browser use.

OpenAI officially releases GPT-5.6 with a three-tier model family—Sol, Terra, and Luna. Flagship Sol beats Claude on coding benchmarks: twice as fast, a third cheaper.

GPT-5.6 launches with three variants—Sol, Terra, and Luna—focused on agentic coding and computer use. A deep dive into their positioning, a comparison with Anthropic's Fable 5, and a Fable 5 orchestration + GPT-5.6 execution workflow.