Composer 2.5 vs Grok 4.5
Grok 4.5 was superseded by Grok 4.7. The grades below are the last ones measured, so read them as history rather than as this week's board. See the current roster.
Grok 4.5 leads overall, C- to D. Composer 2.5 is about 1.5x cheaper per task. By suite, real-world issues is even at C- and Grok 4.5 takes vibe coding (C- to F). Take Composer 2.5 anyway when you want the side that is cheaper per task and faster on real-world issues.Measured
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.
Verdict: Grok 4.5 vs Composer 2.5
Grok 4.5 leads overall, C- to D. By suite: real-world issues is even at C- (57% vs 60% capability); Grok 4.5 takes vibe coding, C- to F (59% vs 23% capability). Only Composer 2.5 has run spec planning. Composer 2.5 used 2.0% of Cursor Pro's monthly limit per pass, $0.021 per task at the listed price. Grok 4.5 used 6.9% of SuperGrok's weekly limit per pass, $0.032 per task at the listed price. Per task, Composer 2.5 is about 1.5x cheaper ($0.021 vs $0.032). Composer 2.5 is faster on real-world issues: a median task takes 1m 34s against 3m 9s. Both finished every task on it. Reasons to pick Composer 2.5 anyway: it is cheaper per task ($0.021 vs $0.032) and it is faster on real-world issues (1m 34s vs 3m 9s median).
Changed since the previous graded week: Composer 2.5: real-world issues D+ to C-; Grok 4.5: real-world issues usage 8.0% to 6.9% of the weekly limit.
| Dimension | Composer 2.5 | Grok 4.5 | Advantage |
|---|---|---|---|
| Capability | 57% | 60% | +3% (Grok 4.5 leads) |
| Median task time | 1m 34s | 3m 9s | 1m 35s faster (Composer 2.5 leads) |
| Approx. task cost | $0.021 / task | $0.032 / task | $0.010 / task lower (Composer 2.5 leads) |
Composer 2.5: 1.6% of Cursor Pro (1.6% / 1m) 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.
Only Composer 2.5 has run this suite, so there is no head-to-head yet.
| Dimension | Composer 2.5 | Grok 4.5 | Advantage |
|---|---|---|---|
| Capability | 23% | 59% | +36% (Grok 4.5 leads) |
| Median task time | 1m 37s | 3m 40s | 2m 3s faster (Composer 2.5 leads) |
| Approx. task cost | $0.022 / task | $0.031 / task | $0.009 / task lower (Composer 2.5 leads) |
Composer 2.5: 0.1% of Cursor Pro (0.1% / 1m) 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, Composer 2.5 or Grok 4.5?
Grok 4.5 clears higher: tier 4 of 5 versus tier 1 for Composer 2.5 on real-world@v3, our private suite of real-world coding problems. Latest measurement 2026-09-27.
Which is cheaper per task, Composer 2.5 or Grok 4.5?
Composer 2.5 used 2.0% of Cursor Pro's monthly limit per pass, $0.021 per task at the listed price. Grok 4.5 used 6.9% of SuperGrok's weekly limit per pass, $0.032 per task at the listed price. Per task, Composer 2.5 is about 1.5x cheaper ($0.021 vs $0.032).
What do Composer 2.5 and Grok 4.5 cost a month?
Composer 2.5 runs on Cursor Pro at $20/month (public price as of 2026-07-20). Grok 4.5 runs on SuperGrok at $30/month (public price as of 2026-07-20).