Claude Opus 5
0%say nerfed · 24h
Head to head Swap sides
Claude Opus 5 vs Claude Fable 5.1
Two crowds, side by side. Everything here is a vote count — it says how loud a room is, not what a maker shipped.
Claude Fable 5.1
0%say nerfed · 24h
Scorecard
- Say nerfed · 24h Share of the last day's votes calling the model nerfed
- Claude Opus 5: 0%
- Claude Fable 5.1: 0%
- Say nerfed · all-time The same share across every vote ever recorded
- Claude Opus 5: 50%
- Claude Fable 5.1: 0%
- 30-day drift Percentage points the daily share has moved across the window
- Claude Opus 5: 0 pp
- Claude Fable 5.1: 0 pp
- Votes · 24h How much crowd is behind today's number — bigger is steadier, not better
- Claude Opus 5: 0
- Claude Fable 5.1: 0
Share who say nerfed · 30 days
30 days agonow
On paper
| Spec | Claude Opus 5 | Claude Fable 5.1 |
|---|---|---|
| Maker | Anthropic | Anthropic |
| Version | 5 | 5.1 |
| Released | Jul 24, 2026 | Sep 1, 2026 |
| Status | Still offered | Still offered |
| Votes all-time | 20 | 0 |
| Top nerf reason | Instructions · 60% | — |
What the nerf votes name · 30 days
Share of each model's own nerf votes citing that category. A vote can name more than one, so the four do not add up to 100.
- Code
- Claude Opus 5: 40%
- Claude Fable 5.1: 0%
- Instructions
- Claude Opus 5: 60%
- Claude Fable 5.1: 0%
- Refusals
- Claude Opus 5: 0%
- Claude Fable 5.1: 0%
- Speed
- Claude Opus 5: 20%
- Claude Fable 5.1: 0%