claude-haiku-4-5 vs claude-sonnet-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-haiku-4-5 | claude-sonnet-5 | Advantage |
|---|---|---|---|
| Capability | 63% | 50% | +13% (claude-haiku-4-5 leads) |
| Median task time | 3m 58s | 4m 22s | 24s faster (claude-haiku-4-5 leads) |
| Approx. task cost | $0.005 / task | $0.005 / task | $0.001 / task lower (claude-haiku-4-5 leads) |
claude-haiku-4-5: 5.0% of Claude Max 20x (5.0% / 5h, 1.0% / 1w) per run. claude-sonnet-5: 6.0% of Claude Max 20x (6.0% / 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-haiku-4-5 2922 vs claude-sonnet-5 2435 suite runs per month (claude-haiku-4-5 leads); per plan-dollar: 14.61 vs 12.18 (claude-haiku-4-5 leads). Work figures compare outputs, so unlike quota shares they are comparable across plans.
| Dimension | claude-haiku-4-5 | claude-sonnet-5 | Advantage |
|---|---|---|---|
| Capability | 24% | 39% | +15% (claude-sonnet-5 leads) |
| Median task time | 3m 4s | 4m 38s | 1m 34s faster (claude-haiku-4-5 leads) |
| Approx. task cost | $0.003 / task | $0.010 / task | $0.007 / task lower (claude-haiku-4-5 leads) |
claude-haiku-4-5: 1.0% of Claude Max 20x (1.0% / 5h) per run. claude-sonnet-5: 3.0% of Claude Max 20x (3.0% / 5h) per run. Each figure is a share of that agent's own plan, so there is no delta to draw.
Work per window: claude-haiku-4-5 14610 vs claude-sonnet-5 4870 suite runs per month (claude-haiku-4-5 leads); per plan-dollar: 73.05 vs 24.35 (claude-haiku-4-5 leads). Work figures compare outputs, so unlike quota shares they are comparable across plans.
| Dimension | claude-haiku-4-5 | claude-sonnet-5 | Advantage |
|---|---|---|---|
| Capability | 23% | 34% | +11% (claude-sonnet-5 leads) |
| Median task time | 4m 18s | 5m 17s | 59s faster (claude-haiku-4-5 leads) |
| Approx. task cost | not measured | $0.008 / task | - |
claude-haiku-4-5: 0.0% of Claude Max 20x per good solve. claude-sonnet-5: 0.6% of Claude Max 20x (0.6% / 5h) per good solve. Each figure is a share of that agent's own plan, so there is no delta to draw.
Grades and deltas are comparable only within a suite version. See methodology.
Frequently asked questions
Which is better for coding, claude-haiku-4-5 or claude-sonnet-5?
Both clear tier 2 of 5, but claude-haiku-4-5 scores higher on capability: 63% versus 50% on real-world@v3, our private suite of real-world coding problems. Latest measurement 2026-08-18.
Which gives more work per dollar, claude-haiku-4-5 or claude-sonnet-5?
claude-haiku-4-5 delivers more benchmark work per subscription dollar: 14.61 suite runs per plan-dollar versus 12.18 for claude-sonnet-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-haiku-4-5 and claude-sonnet-5 cost?
claude-haiku-4-5 runs on Claude Max 20x at $200/month (public price as of 2026-08-05). claude-sonnet-5 runs on Claude Max 20x at $200/month (public price as of 2026-08-05).