claude-fable-5 vs claude-haiku-4-5
Each agent graded on the same private suites, running headless through its own tools. Advantages are oriented so a win is a win, whichever way the metric runs.
| Dimension | claude-fable-5 | claude-haiku-4-5 | Advantage |
|---|---|---|---|
| Capability | 60% | 28% | +32% (claude-fable-5 leads) |
| Median task time | 3m 5s | 3m 31s | 26s faster (claude-fable-5 leads) |
| Approx. task cost | $0.031 / task | $0.003 / task | $0.028 / task lower (claude-haiku-4-5 leads) |
claude-fable-5: 34.0% of Claude Max 20x (34.0% / 5h, 4.0% / 1w) per run. claude-haiku-4-5: 3.0% of Claude Max 20x (3.0% / 5h, 1.0% / 1w) per run. Each figure is a share of that agent's own plan, so there is no delta to draw.
Work per window: claude-fable-5 430 vs claude-haiku-4-5 4870 suite runs per month (claude-haiku-4-5 leads); per plan-dollar: 2.15 vs 24.35 (claude-haiku-4-5 leads). Work figures compare outputs, so unlike quota shares they are comparable across plans.
| Dimension | claude-fable-5 | claude-haiku-4-5 | Advantage |
|---|---|---|---|
| Capability | 85% | 23% | +61% (claude-fable-5 leads) |
| Median task time | 5m 11s | 3m 50s | 1m 21s faster (claude-haiku-4-5 leads) |
| Approx. task cost | $0.038 / task | $0.007 / task | $0.031 / task lower (claude-haiku-4-5 leads) |
claude-fable-5: 2.8% of Claude Max 20x (2.8% / 5h, 0.6% / 1w) per good solve. claude-haiku-4-5: 0.5% of Claude Max 20x (0.5% / 5h) per good solve. Each figure is a share of that agent's own plan, so there is no delta to draw.
Work per window: claude-fable-5 5218 vs claude-haiku-4-5 29220 good solves per month (claude-haiku-4-5 leads); per plan-dollar: 26.09 vs 146.10 (claude-haiku-4-5 leads). Work figures compare outputs, so unlike quota shares they are comparable across plans.
Grades and deltas are comparable only within a suite version. See methodology.
Frequently asked questions
Which is better for coding, claude-fable-5 or claude-haiku-4-5?
claude-fable-5 clears higher: tier 4 of 5 versus tier 1 for claude-haiku-4-5 on real-world@v3, our private suite of real-world coding problems. Latest measurement 2026-08-10.
Which gives more work per dollar, claude-fable-5 or claude-haiku-4-5?
claude-haiku-4-5 delivers more benchmark work per subscription dollar: 24.35 suite runs per plan-dollar versus 2.15 for claude-fable-5 (at $200/month priced 2026-08-05, and $200/month priced 2026-08-05). Work figures compare outputs, so unlike raw quota shares they are comparable across plans.
How much do claude-fable-5 and claude-haiku-4-5 cost?
claude-fable-5 runs on Claude Max 20x at $200/month (public price as of 2026-08-05). claude-haiku-4-5 runs on Claude Max 20x at $200/month (public price as of 2026-08-05).