claude-sonnet-5 vs composer-2.5
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-sonnet-5 | composer-2.5 | Advantage |
|---|---|---|---|
| Capability | 53% | 60% | +7% (composer-2.5 leads) |
| Median task time | 5m 6s | 3m 52s | 1m 14s faster (composer-2.5 leads) |
| Approx. task cost | $0.009 / task | $0.025 / task | $0.016 / task lower (claude-sonnet-5 leads) |
claude-sonnet-5: about 9.7% of Claude Max 20x (about 9.7% / 5h, 1.0% / 1w) per run (estimated: 2 of 15 cells measured no share of their own). composer-2.5: 1.9% of Cursor Pro (1.9% / 1m) per run. Each figure is a share of that agent's own plan, so there is no delta to draw.
| Dimension | claude-sonnet-5 | composer-2.5 | Advantage |
|---|---|---|---|
| Capability | 37% | 52% | +15% (composer-2.5 leads) |
| Median task time | 5m 21s | 4m 56s | 25s faster (composer-2.5 leads) |
| Approx. task cost | $0.005 / task | $0.025 / task | $0.020 / task lower (claude-sonnet-5 leads) |
claude-sonnet-5: 0.4% of Claude Max 20x (0.4% / 5h, 0.2% / 1w) per good solve. composer-2.5: 0.1% of Cursor Pro (0.1% / 1m) 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-sonnet-5 or composer-2.5?
composer-2.5 clears higher: tier 4 of 5 versus tier 3 for claude-sonnet-5 on real-world@v3, our private suite of real-world coding problems. Latest measurement 2026-08-11.
How much do claude-sonnet-5 and composer-2.5 cost?
claude-sonnet-5 runs on Claude Max 20x at $200/month (public price as of 2026-08-05). composer-2.5 runs on Cursor Pro at $20/month (public price as of 2026-07-20).