claude-opus-5 vs grok-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-opus-5 | grok-4.5 | Advantage |
|---|---|---|---|
| Capability | 57% | 60% | +3% (grok-4.5 leads) |
| Median task time | 3m 57s | 3m 9s | 48s faster (grok-4.5 leads) |
| Approx. task cost | $0.010 / task | $0.032 / task | $0.022 / task lower (claude-opus-5 leads) |
claude-opus-5: 11.0% of Claude Max 20x (11.0% / 5h) per run. grok-4.5: 6.9% of SuperGrok (6.9% / 1w) per run. Each figure is a share of that agent's own plan, so there is no delta to draw.
| Dimension | claude-opus-5 | grok-4.5 | Advantage |
|---|---|---|---|
| Capability | 54% | 59% | +5% (grok-4.5 leads) |
| Median task time | 6m 57s | 3m 40s | 3m 18s faster (grok-4.5 leads) |
| Approx. task cost | $0.016 / task | $0.031 / task | $0.014 / task lower (claude-opus-5 leads) |
claude-opus-5: 1.2% of Claude Max 20x (1.2% / 5h) per good solve. grok-4.5: 0.4% of SuperGrok (0.4% / 1w) 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-opus-5 or grok-4.5?
grok-4.5 clears higher: tier 4 of 5 versus tier 2 for claude-opus-5 on real-world@v3, our private suite of real-world coding problems. Latest measurement 2026-08-10.
How much do claude-opus-5 and grok-4.5 cost?
claude-opus-5 runs on Claude Max 20x at $200/month (public price as of 2026-08-05). grok-4.5 runs on SuperGrok at $30/month (public price as of 2026-07-20).