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Every frame of this video is a Rust function.

Opus 5.5 + @fframes_rust : particles, 3D geometry, springs, shaders and an audio-reactive ring, all on a 128 BPM beat grid.

fframes lets an agent write video as Rust + SVG, then inspect every frame as data: 1,800 frames, 0 problems, never played once.

What would you have it make next?

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Remotion and HyperFrames render your video through a browser.

fframes skips the browser entirely. You write the video in Rust + SVG and it renders straight on the GPU.

Their demo: built by Opus 5.5, rendered in 24 seconds.

And it ships as an agent skill, so your coding agent writes the video for you:

npx skills add https://t.co/rd9lGifxqY

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https://t.co/StWQQ62L1R

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Opus 5.5 is scary good at motion design.

So we used it to build a skill that turns any PDF into an animated web book.

Drop in a PDF, get back one HTML file with:
- real 3D page turns
- text that reflows to fit any screen
- chapter openers, search, bookmarks
- day and night mode

The launch video? Also Opus 5.5. Every frame written as code, the music synthesized from scratch. No After Effects, no editor. Skill in replies👇

What's the first PDF you'd turn into a book?

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Opus 5.5 is cracked at video editing. It made this trailer for this Godot game, which Opus 5.5 also built, and it honestly looks studio level. Same model made the game and the trailer.

Now I'm wondering if Chinese labs can ship an open source model at this level. Which one do you think gets there first?

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Last time we posted that Opus 5.5 got nerfed, we got a lot of criticism, so we ran one more test.

We tested Opus 5.5 on launch day and again today using the exact same Lander prompt and reference images.

Launch day vs today below :

Today’s version has rendering glitches, worse bullet physics, missing spacecraft break-apart physics, no camera toggles, and a worse UI.

We also inspected the code and found some questionable implementation choices that explain the regressions.

LLMs are non-deterministic, but this isn't a minor variation. The results are clearly worse. Anthropic, what changed? Is this just a marketing strategy for the launch of Fable 5.5?

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use my canvas animation skill to create similar films in claude : https://t.co/StWQQ62L1R

[Build Fast with AI @BuildFastWithAI]

Asked Opus 5.5 and GPT-6 Sol to create an MP4 of Spider-Man fighting the X-Men in Avengers: Doomsday.

The results below.

Opus 5.5 refused to create Spider-Man due to copyright, but made something similar using motion graphics and Canvas.

GPT-6 Sol used image generation + motion graphics.

Codex wins here mainly because of its image generation capabilities, tbh.

When is Claude adding this?

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@wowbuffet sure

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Opus 5.5 created this entire 3D world and pagoda in one shot.

Prompt: “Implement code to be able to navigate in a pagoda in 3D.”

The wild part is that it didn’t even use 5% of my daily limit. The quality you’re getting from these models for one-shot creative coding is getting pretty wild.

Anthropic really cooked with this on👀

Curious to see how @OpenAI tries to one-up this.

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@overestal he updated it after our post check again now

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Anthropic launched Sonnet 5.5, made it as good as Opus 5.5, then went ahead and nerfed Opus 5.5. Crazy marketing.

We tested Opus 5.5 on launch day and again today, on the same open-world GTA 6 India prompt.

Launch day vs today below. The difference is clearly visible.

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@grubbygrubsters @fggp28 @bridgemindai

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yes and we posted this on october 2, after our post bridgebench also tested again and noticed the drop.

Also did you notice some people got early access to fable 5.5 today? this is nothing but a marketing tactic. they nerf the previous model while releasing the latest one so people start glazing how the new model is so much better

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@fggp28 @grubbygrubsters exactly

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@grubbygrubsters @fggp28 yes after our post bridgebench checked and updated their benchmark

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@Liquid_Hwite https://t.co/JKjPvH2XiZ

[BridgeMind @bridgemindai]

Claude Opus 5.5 just took a big drop on NerfBench.

Yesterday it was scoring above launch. Today it's at 94.2%.

GPT 6 Astra: 98.0%
Sonnet 5.5: 100.9%
GPT 6.1 Sol: 106.7%

94.2% is still inside normal variance, so we can't call it a nerf yet.

But we're watching Opus 5.5 very closely.

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@H28QApex https://t.co/JKjPvH2XiZ

[BridgeMind @bridgemindai]

Claude Opus 5.5 just took a big drop on NerfBench.

Yesterday it was scoring above launch. Today it's at 94.2%.

GPT 6 Astra: 98.0%
Sonnet 5.5: 100.9%
GPT 6.1 Sol: 106.7%

94.2% is still inside normal variance, so we can't call it a nerf yet.

But we're watching Opus 5.5 very closely.

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@CaioMat21919469 @JoseLeandr90902 check nerf bench, it showed a 6% drop

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@grubbygrubsters @fggp28 actually the bridgebench post h28q apex made is 1 day older than when we posted this. check the latest one opus 5.5 did get nerfed.

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Use my threejs skill to build similar games https://t.co/StWQQ62L1R