Claude Opus 5.5 vs Grok 4.6
Claude Opus 5.5 leads overall, C+ to C-. Claude Opus 5.5 is about 13x cheaper per task. By suite, Claude Opus 5.5 takes real-world issues (C- to D) and spec planning (C+ to C). The data gives no reason to pick Grok 4.6 over Claude Opus 5.5 this week.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 4.6 vs Claude Opus 5.5
Claude Opus 5.5 leads overall, C+ to C-. By suite: Claude Opus 5.5 takes real-world issues, C- to D (60% vs 47% capability); Claude Opus 5.5 takes spec planning, C+ to C (69% vs 66% capability); Claude Opus 5.5 takes vibe coding, B to C- (85% vs 61% capability). Claude Opus 5.5 used 1% of Claude Max 5x's weekly limit per pass, $0.012 per task at the listed price. Grok 4.6 used 13% of SuperGrok Plus's weekly limit per pass, $0.157 per task at the listed price. Per task, Claude Opus 5.5 is about 13x cheaper ($0.012 vs $0.157). Claude Opus 5.5 is faster on real-world issues: a median task takes 2m 18s against 7m 10s. Both finished every task on it. The data gives no reason to pick Grok 4.6 over Claude Opus 5.5 this week.
Changed since W38: Grok 4.6: real-world issues C- to D, real-world issues usage 4% to 3% of the weekly limit, vibe coding C+ to C-.
| Dimension | Claude Opus 5.5 | Grok 4.6 | Advantage |
|---|---|---|---|
| Capability | 60% | 47% | +13% (Claude Opus 5.5 leads) |
| Median task time | 2m 18s | 7m 10s | 4m 52s faster (Claude Opus 5.5 leads) |
| Approx. task cost | $0.015 / task | $0.046 / task | $0.031 / task lower (Claude Opus 5.5 leads) |
Claude Opus 5.5: 16.0% of Claude Max 5x (16.0% / 5h, 1.0% / 1w) per run. Its weekly limit holds about 14.6 of the week's 33.6 5h windows. Grok 4.6: 3.0% of SuperGrok Plus (3.0% / 1w) per run. Each figure is a share of that agent's own plan, so there is no delta to draw.
| Dimension | Claude Opus 5.5 | Grok 4.6 | Advantage |
|---|---|---|---|
| Capability | 69% | 66% | +3% (Claude Opus 5.5 leads) |
| Median task time | 3m 45s | 45m 26s | 41m 41s faster (Claude Opus 5.5 leads) |
| Approx. task cost | $0.010 / task | $0.575 / task | $0.565 / task lower (Claude Opus 5.5 leads) |
Claude Opus 5.5: 6.0% of Claude Max 5x (6.0% / 5h) per run. Its weekly limit holds about 14.6 of the week's 33.6 5h windows. Grok 4.6: 10.0% of SuperGrok Plus (10.0% / 1w) per run. Each figure is a share of that agent's own plan, so there is no delta to draw.
| Dimension | Claude Opus 5.5 | Grok 4.6 | Advantage |
|---|---|---|---|
| Capability | 85% | 61% | +23% (Claude Opus 5.5 leads) |
| Median task time | 2m 27s | 11m 14s | 8m 47s faster (Claude Opus 5.5 leads) |
| Approx. task cost | $0.046 / task | <$0.230 / task | $0.184 / task lower (Claude Opus 5.5 leads) |
Claude Opus 5.5: 0.8% of Claude Max 5x (0.8% / 5h, 0.2% / 1w) per good solve. Its weekly limit holds about 14.6 of the week's 33.6 5h windows. Grok 4.6: under 1% of SuperGrok Plus 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 5.5 or Grok 4.6?
Both clear tier 4 of 5, but Claude Opus 5.5 scores higher on capability: 60% versus 47% on real-world@v3, our private suite of real-world coding problems. Latest measurement 2026-09-23.
Which is cheaper per task, Claude Opus 5.5 or Grok 4.6?
Claude Opus 5.5 used 1% of Claude Max 5x's weekly limit per pass, $0.012 per task at the listed price. Grok 4.6 used 13% of SuperGrok Plus's weekly limit per pass, $0.157 per task at the listed price. Per task, Claude Opus 5.5 is about 13x cheaper ($0.012 vs $0.157).
What do Claude Opus 5.5 and Grok 4.6 cost a month?
Claude Opus 5.5 runs on Claude Max 5x at $100/month (public price as of 2026-07-27). Grok 4.6 runs on SuperGrok Plus at $100/month (public price as of 2026-09-14).