Loading video...

Video Failed to Load

Go Home

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...

theonejvo's profile picture

Jamieson O'Reilly

23,631 subscribers

2,722,896 views • 27 days ago •via X (Twitter)

GamingScience & Technology
LIVE

Anya Rossi• Live Now

Private livecam show

0 Comments

No comments available

Comments from the original post will appear here

Related Videos

I made Fable 5 and Opus 4.8 build the same app, website & game. The results will shock you. Head-to-head comparison of Fable 5 versus Opus 4.8: 0:00 Intro 0:47 Website design 4:51 Mobile app design 7:14 Game design 12:37 Final thoughts
13:44

I made Fable 5 and Opus 4.8 build the same app, website & game. The results will shock you. Head-to-head comparison of Fable 5 versus Opus 4.8: 0:00 Intro 0:47 Website design 4:51 Mobile app design 7:14 Game design 12:37 Final thoughts

Miles Deutscher

62,255 views • 5 days ago

Head of Anthropic Labs: "Fable is one of those models you'll just remember - like Sonnet 3.5, Opus 4, Opus 4.5. Fable is way smarter than me. It finishes a task, lists its trade-offs, and I have to ask it to explain them to me." in 20-minute talk, the Anthropic head reveals the full capabilities of the Fable 5 model in practice. Watch it now, then read how to use this frontier model in the article below
25:40

Head of Anthropic Labs: "Fable is one of those models you'll just remember - like Sonnet 3.5, Opus 4, Opus 4.5. Fable is way smarter than me. It finishes a task, lists its trade-offs, and I have to ask it to explain them to me." in 20-minute talk, the Anthropic head reveals the full capabilities of the Fable 5 model in practice. Watch it now, then read how to use this frontier model in the article below

Movez

33,774 views • 7 days ago

this is f**king dangerous someone just figured out how to get fable 5 reasoning in opus 4.8 with one prompt you have less than 24 hours to set this up as this takes away 20% of your usage limit here is how: 1) Paste the prompt and ask it to "make an operating manual" 2) Create a New Claude Project and "Add this .md in Project instructions 3) Use Opus 4.8 High/Max and now you have Fable 5 reasoning at 1/5th the price save and bookmark it no matter what
0:41

this is f**king dangerous someone just figured out how to get fable 5 reasoning in opus 4.8 with one prompt you have less than 24 hours to set this up as this takes away 20% of your usage limit here is how: 1) Paste the prompt and ask it to "make an operating manual" 2) Create a New Claude Project and "Add this .md in Project instructions 3) Use Opus 4.8 High/Max and now you have Fable 5 reasoning at 1/5th the price save and bookmark it no matter what

Avid

889,646 views • 3 days ago

Anthropic engineer: "Fable is one of those models you’ll just remember - like Sonnet 3.5, Opus 4, Opus 4.5. We just removed 80% of Claude Code’s system prompt. A new class of models wants a smaller prompt." in 20-minute session, an Anthropic core engineer reveals the capabilities of Fable. Watch it now, then read how to use this frontier model in the article below.
18:51

Anthropic engineer: "Fable is one of those models you’ll just remember - like Sonnet 3.5, Opus 4, Opus 4.5. We just removed 80% of Claude Code’s system prompt. A new class of models wants a smaller prompt." in 20-minute session, an Anthropic core engineer reveals the capabilities of Fable. Watch it now, then read how to use this frontier model in the article below.

Movez

547,534 views • 9 days ago

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.
1:17

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

30,972 views • 25 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
2:17

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

115,147 views • 27 days ago

Anthropic just released 3 workshops on how to actually use Fable 5 to its full potential: 00:00 - Full guide to Fable 5 19:02 - How Anthropic uses Fable 5 internally 44:46 - How to build effective agents with Fable those 3 stages replaced 20 articles on Fable 5 for me. give it 1-hour today and read how to build self-improving agents with Fable 5 in the article below.
57:24

Anthropic just released 3 workshops on how to actually use Fable 5 to its full potential: 00:00 - Full guide to Fable 5 19:02 - How Anthropic uses Fable 5 internally 44:46 - How to build effective agents with Fable those 3 stages replaced 20 articles on Fable 5 for me. give it 1-hour today and read how to build self-improving agents with Fable 5 in the article below.

Codez

50,268 views • 4 days ago

Prompt: "Render a Black Hole" Model: Claude Fable 5 (high) ** Anthropic cooked so hard, holy Fck **
0:40

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

Techikansh

94,135 views • 1 month 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.
0:30

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

319,114 views • 1 month ago

.Claude Fable 5 is now in Box AI. We ran it head-to-head against Opus 4.8 on enterprise tasks: → Report Drafting: 87% vs. 81% (+6.8 pp) → Data Analysis: 80% vs. 76% (+4.6 pp) → Due Diligence: 77% vs. 74% (+3.4 pp) → Media and Entertainment: 78% vs. 61% (+17 pp) → Financial Services: 89% vs. 83% (+5.9 pp)
6:13

.Claude Fable 5 is now in Box AI. We ran it head-to-head against Opus 4.8 on enterprise tasks: → Report Drafting: 87% vs. 81% (+6.8 pp) → Data Analysis: 80% vs. 76% (+4.6 pp) → Due Diligence: 77% vs. 74% (+3.4 pp) → Media and Entertainment: 78% vs. 61% (+17 pp) → Financial Services: 89% vs. 83% (+5.9 pp)

Box

609,573 views • 29 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)
0:34

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

207,097 views • 1 month 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.
0:43

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

51,323 views • 1 month 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.
1:12

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

269,192 views • 1 month 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
3:17

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 • 28 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.
0:24

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

888,250 views • 29 days ago

omg... Fable 5 is back and it's so good I asked Fable to create a game called: The race for Super Intelligence... After 4 prompts, and $173 worth of tokens Fable 5 created this game. (Prompt Below)
1:34

omg... Fable 5 is back and it's so good I asked Fable to create a game called: The race for Super Intelligence... After 4 prompts, and $173 worth of tokens Fable 5 created this game. (Prompt Below)

Riley Brown

512,634 views • 8 days ago

Before Fable 5 was pulled, we used it to prompt this landing page. It was ahead of its time.
0:38

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

Meng To

135,664 views • 26 days ago

Anthropic just dropped 5 workshops, revealing the latest capabilities of Fable 5: • 00:00 - deep look into Fable 5 • 11:22 - Fable 5 and the capability curve • 30:54 - building managed agents with Fable 5 • 44:29 - real use cases of Fable 5 by teams • 57:43 - how to deploy agents with Fable 5 These 1-hour of sessions will replace 100 articles on how to actually use Fable 5. Watch them today, then read the best practices from the sessions in the article below.
1:24:55

Anthropic just dropped 5 workshops, revealing the latest capabilities of Fable 5: • 00:00 - deep look into Fable 5 • 11:22 - Fable 5 and the capability curve • 30:54 - building managed agents with Fable 5 • 44:29 - real use cases of Fable 5 by teams • 57:43 - how to deploy agents with Fable 5 These 1-hour of sessions will replace 100 articles on how to actually use Fable 5. Watch them today, then read the best practices from the sessions in the article below.

Codez

541,871 views • 6 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.
0:39

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...

449,017 views • 1 month ago

Creator of Claude Code: “Fable 5 is writing 100% of my code now. It’s at least 3x more powerful than Opus.” Every problem I gave to Fable, it one-shotted. I’m running out of coding problems for it. in 40-minute talk Boris explain how to unlock 100% potential of Claude new models Fable 5 + loops + dynamic workflows + routines- that’s the secret Worth more then 500$ vibe-coding course
40:26

Creator of Claude Code: “Fable 5 is writing 100% of my code now. It’s at least 3x more powerful than Opus.” Every problem I gave to Fable, it one-shotted. I’m running out of coding problems for it. in 40-minute talk Boris explain how to unlock 100% potential of Claude new models Fable 5 + loops + dynamic workflows + routines- that’s the secret Worth more then 500$ vibe-coding course

Codez

274,136 views • 18 days ago