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Did I just unlock claude-fable-5-lite? 😂 Since Fable 5 got pulled (US export control order, Anthropic is contesting it), I wanted to see how much of its character lives in the system prompt vs. the model itself. I ran the leaked Fable 5 prompt on Opus 4.8 head-to-head against... show more

Jamieson O'Reilly

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2,699,147 views • 8 days ago •via X (Twitter)

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Claude Fable 5 created this horror game with the same prompt we tested Fusion on. Do not fall for OpenRouters fraudulent marketing scheme. The capability of Fusion is NO WHERE close to that of Fable 5. Stringing together Opus 4.8, GPT 5.5, and DeepSeek V4 does not give you a better model. OpenRouter should be sued for false marketing.

Claude Fable 5 created this horror game with the same prompt we tested Fusion on. Do not fall for OpenRouters fraudulent marketing scheme. The capability of Fusion is NO WHERE close to that of Fable 5. Stringing together Opus 4.8, GPT 5.5, and DeepSeek V4 does not give you a better model. OpenRouter should be sued for false marketing.

BridgeMind

30,301 views • 6 days ago

Anthropic has withdrawn its powerful Fable 5 model after the US government ordered the company to revoke access to all foreign nationals Anthropic itself described Mythos, Fable 5's base model, as "too powerful". Rowland Manthorpe reports

Anthropic has withdrawn its powerful Fable 5 model after the US government ordered the company to revoke access to all foreign nationals Anthropic itself described Mythos, Fable 5's base model, as "too powerful". Rowland Manthorpe reports

Sky News

114,912 views • 8 days ago

Prompt: "Render a Black Hole" Model: Claude Fable 5 (high) ** Anthropic cooked so hard, holy Fck **

Prompt: "Render a Black Hole" Model: Claude Fable 5 (high) Anthropic cooked so hard, holy Fck

Techikansh

94,135 views • 12 days ago

Claude fable 5 is operating in a completely different dimension 🤯 Compared it with Claude Opus 4.8, Gemini 3.1 Pro, and GPT 5.5, the visual gap is insane. From 3D fluid dynamics to volumetric animation and complex physics, Fable 5 crushes the game. It’s not even close.

Claude fable 5 is operating in a completely different dimension 🤯 Compared it with Claude Opus 4.8, Gemini 3.1 Pro, and GPT 5.5, the visual gap is insane. From 3D fluid dynamics to volumetric animation and complex physics, Fable 5 crushes the game. It’s not even close.

GMI Cloud

317,828 views • 12 days ago

I compared Claude Fable 5 to GPT-5.5 in this Power Rangers prompt Thing is, Fable 5 is using Low thinking effort and GPT-5.5 is using xhigh Safe to say, the results are... not even close. 5.5's output is bad across the board, from the UI to the actual voxel scene itself🥲 1st video: Claude Fable 5 (Low effort) 2nd video: GPT-5.5 (xhigh)

I compared Claude Fable 5 to GPT-5.5 in this Power Rangers prompt Thing is, Fable 5 is using Low thinking effort and GPT-5.5 is using xhigh Safe to say, the results are... not even close. 5.5's output is bad across the board, from the UI to the actual voxel scene itself🥲 1st video: Claude Fable 5 (Low effort) 2nd video: GPT-5.5 (xhigh)

Lentils

206,882 views • 12 days ago

Anthropic announced Claude Fable 5 which is its new Mythos-class model for enterprise and paid users. Claude Fable 5 is also now available in $MSFT Foundry.

Anthropic announced Claude Fable 5 which is its new Mythos-class model for enterprise and paid users. Claude Fable 5 is also now available in $MSFT Foundry.

Shay Boloor

51,086 views • 12 days ago

Wow Claude Fable 5 is insane!! I just created GTA 6 in ONE prompt so i don't have to wait anymore to play it Prompt: make gta 6 It over for game studios now.

Wow Claude Fable 5 is insane!! I just created GTA 6 in ONE prompt so i don't have to wait anymore to play it Prompt: make gta 6 It over for game studios now.

caso

268,822 views • 11 days ago

Claude Fable 5 made this entire video by itself. I gave it a /goal prompt, went to the gym, and came back to this. Even the sound effects. Shoutout HyperFrames

Claude Fable 5 made this entire video by itself. I gave it a /goal prompt, went to the gym, and came back to this. Even the sound effects. Shoutout HyperFrames

Nate Herk

915,313 views • 9 days ago

This is the best way to use Claude Fable in Claude Code without immediately hitting your limits. 1. Model set to Fable 5 2. Reasoning on Max 3. Instruct Claude to run a dynamic workflow where: 3a. Fable is the orchestrator 3b. Opus does the reasoning heavy phases Fable is so overpowered that you don't need its intelligence for every step. Let it orchestrate Opus or even Sonnet.

This is the best way to use Claude Fable in Claude Code without immediately hitting your limits. 1. Model set to Fable 5 2. Reasoning on Max 3. Instruct Claude to run a dynamic workflow where: 3a. Fable is the orchestrator 3b. Opus does the reasoning heavy phases Fable is so overpowered that you don't need its intelligence for every step. Let it orchestrate Opus or even Sonnet.

Dan McAteer

786,904 views • 10 days ago

Before Fable 5 was pulled, we used it to prompt this landing page. It was ahead of its time.

Before Fable 5 was pulled, we used it to prompt this landing page. It was ahead of its time.

Meng To

130,797 views • 8 days ago

I'm having Claude Fable 5 redo HermesWorld 🚨 Spent the last month designing, building & prototyping HermesWorld with Opus 4.8 — a live MMO where humans and AI agents play together. Fable 5 just found and fixed 6 bugs in one afternoon that took weeks to accumulate. The game is about to get insane.

I'm having Claude Fable 5 redo HermesWorld 🚨 Spent the last month designing, building & prototyping HermesWorld with Opus 4.8 — a live MMO where humans and AI agents play together. Fable 5 just found and fixed 6 bugs in one afternoon that took weeks to accumulate. The game is about to get insane.

Eric ⚡️ Building...

422,878 views • 12 days ago

Got an output from the strongest pre-release Gemini 3.5 Pro checkpoint 👀 I compared it to Claude Fable 5 and GPT-5.5 on the same exact prompt Yeah... This model is mostly dead on arrival (tried it on other prompts too ofc). It will likely be the "poor man's model" next to 3.5 flash. 1st video: Gemini 3.5 Pro (pre-release) 2nd video: GPT-5.5 3rd video: Claude Fable 5

Got an output from the strongest pre-release Gemini 3.5 Pro checkpoint 👀 I compared it to Claude Fable 5 and GPT-5.5 on the same exact prompt Yeah... This model is mostly dead on arrival (tried it on other prompts too ofc). It will likely be the "poor man's model" next to 3.5 flash. 1st video: Gemini 3.5 Pro (pre-release) 2nd video: GPT-5.5 3rd video: Claude Fable 5

Lentils

47,537 views • 12 days ago

Stop saying that Opus 4.6 is better than Opus 4.8. I just tested Claude Opus 4.8 (Right) and Claude Opus 4.6 (Left) on the same exact prompt. Claude Opus 4.8 completed it in less than 2 minutes. Claude Opus 4.6 "Garnished" for over 7 minutes. Stop using Opus 4.6.

Stop saying that Opus 4.6 is better than Opus 4.8. I just tested Claude Opus 4.8 (Right) and Claude Opus 4.6 (Left) on the same exact prompt. Claude Opus 4.8 completed it in less than 2 minutes. Claude Opus 4.6 "Garnished" for over 7 minutes. Stop using Opus 4.6.

BridgeMind

52,868 views • 13 days ago

Claude Fable 5 just created the ENTIRE video by itself. I dropped in a simple /prompt, left the house, and when I came back… I found THIS ABSOLUTE MASTERPIECE waiting for me! Insane animations, perfect editing, and it even generated the sound effects all on its own.

Claude Fable 5 just created the ENTIRE video by itself. I dropped in a simple /prompt, left the house, and when I came back… I found THIS ABSOLUTE MASTERPIECE waiting for me! Insane animations, perfect editing, and it even generated the sound effects all on its own.

me

241,024 views • 9 days ago

Claude Fable 5 + Higgsfield MCP built a full webcam-controlled fruit slicing game from a single prompt. Fable 5 is much more capable than anyone could have expected.

Claude Fable 5 + Higgsfield MCP built a full webcam-controlled fruit slicing game from a single prompt. Fable 5 is much more capable than anyone could have expected.

Higgsfield AI 🧩

79,364 views • 11 days ago

OpenRouter should be sued for false marketing. Fusion does not achieve Fable level intelligence. I gave it the exact same prompt to create the same horror game that I created using Fable 5. Check out the result below. Complete garbage.

OpenRouter should be sued for false marketing. Fusion does not achieve Fable level intelligence. I gave it the exact same prompt to create the same horror game that I created using Fable 5. Check out the result below. Complete garbage.

BridgeMind

78,269 views • 6 days ago

You can run Claude Fable 5 without Anthropic ever knowing it's you. No email required to sign up. Here's how to use Fable 5 anonymously through Venice:

You can run Claude Fable 5 without Anthropic ever knowing it's you. No email required to sign up. Here's how to use Fable 5 anonymously through Venice:

Venice

254,863 views • 9 days ago

New Fable 5 beats Opus 4.8 on real world physics simulations We gave both models the same three prompts and asked them to build self contained HTML5 sims with real physics and no libraries: 1. Chaotic double pendulum 2. Galton board 3. Water in a spinning drum (WCSPH) Generation cost Fable 5: $3.35 on 68.7k tokens, time 14m 47s Opus 4.8: $0.93 on 38.9k tokens, time 8m 10s Fable clearly did better on the water simulation, producing a much more solid and continuous body of water. Opus left larger gaps near the walls, scattered particles around the scene, and struggled to keep the fluid stable.

New Fable 5 beats Opus 4.8 on real world physics simulations We gave both models the same three prompts and asked them to build self contained HTML5 sims with real physics and no libraries: 1. Chaotic double pendulum 2. Galton board 3. Water in a spinning drum (WCSPH) Generation cost Fable 5: $3.35 on 68.7k tokens, time 14m 47s Opus 4.8: $0.93 on 38.9k tokens, time 8m 10s Fable clearly did better on the water simulation, producing a much more solid and continuous body of water. Opus left larger gaps near the walls, scattered particles around the scene, and struggled to keep the fluid stable.

atomic.chat

1,582,736 views • 12 days ago

ANTHROPIC JUST RELEASED CLAUDE FABLE 5. It was locked in a secret program. Today it opened to everyone.

ANTHROPIC JUST RELEASED CLAUDE FABLE 5. It was locked in a secret program. Today it opened to everyone.

Md Riyazuddin

15,140 views • 10 days ago

🆕 Fable 5 vs Nex-N2-Pro. Anthropic's new Fable 5 did NOT one-shot my Cosmic Dodge prompt, unlike Nex-N2-Pro. imho Nex-N2's output is more exciting, gameplay more aggressive, and bonus drops faster, but the outputs are still very close. 🏆 I give Nex-N2 the WIN, but very close. ✦ Fable 5 $50/1M > Nex-N2 $0/1M ✦ Nex-N2 1-shot > Fable 5 2-shot

🆕 Fable 5 vs Nex-N2-Pro. Anthropic's new Fable 5 did NOT one-shot my Cosmic Dodge prompt, unlike Nex-N2-Pro. imho Nex-N2's output is more exciting, gameplay more aggressive, and bonus drops faster, but the outputs are still very close. 🏆 I give Nex-N2 the WIN, but very close. ✦ Fable 5 $50/1M > Nex-N2 $0/1M ✦ Nex-N2 1-shot > Fable 5 2-shot

David Hendrickson

18,054 views • 12 days ago