Compare / head-to-head
Claude Opus 4.1vsGrok 4.20 Reasoning
Grok 4.20 Reasoning leads 4 of 4 shared benchmarks. Grok 4.20 Reasoning is 24x cheaper per token. Grok 4.20 Reasoning has the larger context window (1M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
0 – 4
Grok 4.20 Reasoning leads
Cheaper per token
Grok 4.20 Reasoning
24x cheaper, input + output
Larger context
Grok 4.20 Reasoning
1M tokens
Provider uptime (30d)
100% · —
Anthropic · xAI
Claude Opus 4.1
Anthropic · released 2025-08-05
textvision
Grok 4.20 Reasoning
xAI · released 2026-03-09
textvision
Quality
Benchmark matrix
4 shared · 2 only Claude Opus 4.1 · 1 only Grok 4.20 Reasoning| Benchmark | Claude Opus 4.1 | Grok 4.20 Reasoning | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 4 | ||||
| GPQA Diamond | 77.3% ↗epoch | 89.3% ↗epoch | -12 pt | Grok 4.20 Reasoning |
| FrontierMath Tier 4 v2 (Epoch AI run) | 2.4% ↗epoch | 17.1% ↗epoch | -14.7 pt | Grok 4.20 Reasoning |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 12.6% ↗epoch | 44.9% ↗epoch | -32.3 pt | Grok 4.20 Reasoning |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 68.9% ↗epoch | 92.2% ↗epoch | -23.3 pt | Grok 4.20 Reasoning |
| Only Claude Opus 4.1 reports · 2 | ||||
| SWE-bench Verified | 74.5% ↗ | not reported | — | — |
| SWE-bench Verified (Epoch AI run) | 73.3% ↗epoch | not reported | — | — |
| Only Grok 4.20 Reasoning reports · 1 | ||||
| SimpleQA Verified | not reported | 30.2% ↗epoch | — | — |
Scores tagged "epoch" or "matharena" are independent runs, used only where the lab has not published its own; ⚠ marks rows MathArena flags as released after the competition. Higher is better on every row. Δ is Claude Opus 4.1 minus Grok 4.20 Reasoning in the benchmark's own unit. "Not reported" means the lab has not published that figure; it is not a zero. ↗ opens the source.
Specs & pricing
Side by side
Official pricing pages and model cards| Spec | Claude Opus 4.1 | Grok 4.20 Reasoning | Edge |
|---|---|---|---|
| Context window | 200K tokens | 1M tokens | Grok 4.20 Reasoning |
| Max output | 32K tokens | — | — |
| Input price / 1M | $15 ↗ | $1.25 ↗ | Grok 4.20 Reasoning |
| Output price / 1M | $75 ↗ | $2.5 ↗ | Grok 4.20 Reasoning |
| Cached input / 1M | $1.5 ↗ | $0.2 ↗ | Grok 4.20 Reasoning |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $90 | $3.75 | Grok 4.20 Reasoning |
| Modalities | text · vision | text · vision | Tie |
| Released | 2025-08-05 | 2026-03-09 | — |
| Cited benchmark scores | 6 | 5 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
Claude Opus 4.1 vs …
Models sharing the most benchmarksMore matchups
Grok 4.20 Reasoning vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run Claude Opus 4.1 and Grok 4.20 Reasoning on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.