As of: 2026-10-14 00:22 CEST.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/v/peter-yang-gemini-4-vs-opus-5-5-vs-gpt-6-astra-vs-muse-wonder/

# I Tested Gemini 4 vs Opus 5.5 vs GPT-6 Astra vs Muse Wonder (5 Use Cases)

Peter Yang, 13 October 2026, YouTube. 3,336 views as of 13 October 2026.
Kind: Review.
Watch: https://www.youtube.com/watch?v=zueuzhBkd9Y

## Why it is here

Launch-day four-way comparison across five use cases (18:52): Gemini 4 Argon, Claude Opus 5.5, GPT-6 Astra and Meta's Muse Wonder, released a day earlier. One reviewer's tasks, not a benchmark.

## Description (written by Gemini from the video)

### Summary
Peter Yang compares four frontier AI models—Anthropic's Claude Opus 5.5, OpenAI's GPT-6 Astra, Google's Gemini 4 (Argon), and Meta's Muse Wonder—across five diverse use cases. The tests evaluate each model's coding and generative capabilities across 3D modeling, browser game creation, animated video storytelling, website design, and long-form writing/research synthesis.

### What is shown
* **Introduction & Overview [00:00 - 00:46]:** Peter Yang introduces the comparison between Claude Opus 5.5, GPT-6 Astra, Gemini 4, and Muse Wonder following the recent launch of Gemini 4 and Muse Wonder.
* **Test 1: 3D Blender Scene [00:47 - 03:51]:**
  * Prompt: *"Build Himeji Castle in Blender and render a 30-second cinematic at dawn in cherry blossom season. Get the architecture right and add music you compose in code."*
  * **Opus 5.5 [01:12]:** Renders detailed cherry blossom close-ups with falling petals and an accurate multi-tiered Himeji Castle model with traditional music.
  * **Gemini 4 [01:51]:** Renders dynamic camera cuts (including under a bridge), typographic title cards ("The White Heron Awakens"), and traditional flute instrumentation.
  * **GPT-6 Astra [02:28]:** Generates a reflective water moat scene with piano/orchestral music, though the castle geometry is slightly flatter.
  * **Muse Wonder [03:03]:** Renders a low-poly stylized version with basic textures and birds.
* **Test 2: Browser Rail Shooter Game [03:52 - 07:02]:**
  * Prompt: *"Build a Star Fox-style rail shooter in three.js, with the ship, enemies, boss, and terrain modeled in Blender. Include a barrel roll, lasers, a boss fight, and a soundtrack."* Follow-up: *"Switch up the level to Terrans against the Zerg, and model all the Zerg properly in Blender. The Terran ship can be a Wraith."*
  * **Opus 5.5 ("Hellhound Squadron") [04:30]:** Playable Three.js game with barrel rolls, cockpit voice comms, boss fights, and bloom/lens flare effects.
  * **Gemini 4 ("Terran vs. Zerg") [05:11]:** Playable game with extensive controls, first-person cockpit toggle (`V`), Yamato Cannon ability (`B`), HUD counters, and multiple camera views.
  * **GPT-6 Astra ("Iron Veil") [06:00]:** Simpler arcade rail-shooter aesthetic with basic enemy types and lighting.
  * **Muse Wonder [06:38]:** Basic 3D track shooter with rudimentary shapes and flying craft.
* **Test 3: Animated Emotional Video Short [07:03 - 11:19]:**
  * Prompt: *"Make a 30-second animated short that tells a story and leaves viewers with a strong emotion. Make every frame and sound in code, with no stock assets."*
  * **Opus 5.5 [07:27]:** 3D animated cabin through seasons with counter ("Night 3,651") where a woman waits with a porch light on for a returning car and reunites with her partner.
  * **Gemini 4 ("Paper Wings") [08:19]:** Stylized motion graphic of glowing origami birds crossing distances, displaying excuses ("Tomorrow", "Next Month"), ending with "Call home tonight."
  * **GPT-6 Astra ("One Small Light") [09:18]:** 2D animation of a small robot watering a potted plant inside a dark greenhouse until it grows into a tree.
  * **Muse Wonder [10:22]:** 2D story of an old man sheltering a flower from rain and nursing it, ultimately placing it on a tombstone next to a lighthouse.
* **Test 4: Website Brand & Homepage Redesign [11:20 - 14:15]:**
  * Prompt: *"Redesign the brand and homepage for Behind the Craft, my newsletter, YouTube channel, and podcast. Create a logo, a color and type system, and a homepage that doesn't look AI-generated. Don't look at my current site."*
  * **Opus 5.5 [11:49]:** Editorial newspaper/magazine layout with interactive folded-corner graphic and brand guidelines sheet.
  * **Gemini 4 [12:20]:** Feature-dense terminal/technical documentation layout accompanied by a full Swiss design system breakdown.
  * **GPT-6 Astra [13:06]:** Bold cobalt blue and yellow high-contrast design featuring integrated generated photography and custom vector illustrations.
  * **Muse Wonder [13:43]:** Text-heavy serif publication layout resembling a traditional blog/newspaper index.
* **Test 5: Writing & Medical Synthesis Evaluation [14:16 - 17:46]:**
  * Yang tests models on converting raw interview transcripts into structured newsletter takeaways, as well as complex oncology research synthesis (evaluating clinical trial options and pathology for an oncology case).
  * Shows comparison scorecard [15:14] evaluated via an Opus judge agent across details matched, detail match score, personal voice score, and insightfulness.
* **Conclusion & Summary [17:47 - 18:51]:** Final recommendations breakdown by workflow type.

### Claims & numbers
* The presenter states that with the release of Gemini 4 and Muse Wonder, the frontier AI race is now a "four-horse race" [00:27].
* The presenter notes that Meta's Chief AI Officer Alex Wang stated that Muse Wonder was not trained on 3D models [03:22].
* In the writing benchmark scored out of 31 interview transcript details [15:14]:
  * **Gemini 4:** Matched 21/31 details, detail match score 7/10, personal score 7/10, insightful score 8/10, overall 6.7/10.
  * **Opus 5.5:** Matched 22/31 details, detail match score 7/10, personal score 4/10, insightful score 9/10, overall 6.3/10.
  * **GPT-6 Astra:** Matched 20/31 details, detail match score 6/10, personal score 5/10, insightful score 7/10, overall 5.7/10.
* The presenter claims Gemini 4's writing is significantly improved and far less verbose compared to Gemini 3.8 [16:16].

### Notable quotes
* **[00:17]** "The frontier model race is no longer just between OpenAI and Anthropic. With today's release of Gemini 4 and the launch of Muse Wonder, it's now a four-horse race."
* **[03:39]** "In my humble opinion, Opus is the clear winner here, with Gemini as the runner-up, Astra in number three, and Muse as number four."
* **[17:49]** "Opus is still best-in-class on 3D models, animations, and, you know, editing videos and adding music... Opus is probably the most flashy right now."

### Assessment
This is an authentic hands-on product review and benchmark comparison video by creator Peter Yang testing real outputs generated by Claude Opus 5.5, GPT-6 Astra, Gemini 4, and Muse Wonder. The code-rendered Three.js demos, Blender cinemats, and HTML websites are actively interacted with and demonstrated live on screen.

_Described by gemini-3.8-flash on 2026-10-13 from the video's audio and frames._

## Related

- 2026-10-13: [Google releases Gemini 4 Argon broadly](https://postcutoff.com/e/2026-10-13-gemini-4-argon-general-availability/)
- 2026-10-12: [Meta releases Muse Wonder and Muse Wonder Full, its first frontier-class models](https://postcutoff.com/e/2026-10-12-meta-muse-wonder/)