GPT-6 vs Claude Opus 5.5 vs Gemini 3.8: Which AI Should You Actually Use? (EP1)

September 2026 changed AI. Six new models launched in three weeks — and every company says theirs wins. In this episode of AI Tools, Tested, we cut through the marketing: the benchmarks, the real pricing, and a clear verdict for coding, writing, cheap bulk work, and everyday chat. CHAPTERS: 00:00 — Cold open: six new models, one honest answer 00:32 — Why September 2026 actually matters 01:05 — The verdict you can use right now 01:37 — Section 1: the OpenAI family (Astra, Sol, Luna) 03:41 — Section 2: Claude's one-two punch (Opus 5.5, Fable 5.1) 05:36 — Section 3: Gemini 3.8 Flash, Google's everyday weapon 06:44 — Section 4: DeepSeek V4.1 Flash, the budget king 07:43 — Free Pick of the Week: Google AI Studio 08:26 — The peak insight: the flagship tax is dead 09:23 — Quick recap 10:04 — Next: AI Agents Explained What we cover: • GPT-6 Astra — OpenAI's flagship and its "Critical" reasoning threshold • GPT-6 Sol & Luna — the cheaper siblings that change the math • Claude Opus 5.5 — the agentic coding leader (66.4% vs 57.9% on Terminal-Bench 4.0) • Claude Fable 5.1 — the best prose engine right now • Gemini 3.8 Flash — Google's everyday speed pick • DeepSeek V4.1 Flash — the budget king • Free Pick of the Week: Google AI Studio Next episode: AI Agents Explained — what they are and five you can actually use today. (EP2 of AI Tools, Tested) Playlist: Best AI Tools 2026 – Tested & Compared —    • Best AI Tools 2026 – Tested & Compared   Sources: OpenAI GPT-6 Astra system card & launch coverage; Anthropic Opus 5.5 & Fable 5.1 announcements; Google Gemini 3.8 Flash launch; DeepSeek V4.1-Flash technical report. Benchmark figures quoted are vendor-published — treat as directional. Disclosure: voiceover is AI-narrated from an original human-written script; some B-roll visuals are AI-generated. — from Machine Work TV (@machineworkofficial) ·    / @machineworkofficial   · AI Tools, Tested