Compare / head-to-head
Claude Opus 4vsGrok 4.5
Grok 4.5 leads 2 of 2 shared benchmarks. Grok 4.5 is 11.3x cheaper per token. Grok 4.5 has the larger context window (500K tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
0 – 2
Grok 4.5 leads
Cheaper per token
Grok 4.5
11.3x cheaper, input + output
Larger context
Grok 4.5
500K tokens
Provider uptime (30d)
100% · —
Anthropic · xAI
Claude Opus 4
Anthropic · released 2025-05-22
textvision
Quality
Benchmark matrix
2 shared · 4 only Claude Opus 4 · 4 only Grok 4.5| Benchmark | Claude Opus 4 | Grok 4.5 | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 2 | ||||
| GPQA Diamond | 76.3% ↗epoch | 93.4% ↗epoch | -17.1 pt | Grok 4.5 |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 64.4% ↗epoch | 97.8% ↗epoch | -33.4 pt | Grok 4.5 |
| Only Claude Opus 4 reports · 4 | ||||
| SWE-bench Verified | 72.5% ↗ | not reported | — | — |
| AIME 2024 (no extended thinking) | 33.9% ↗ | not reported | — | — |
| SWE-bench Verified (Epoch AI run) | 70.7% ↗epoch | not reported | — | — |
| Terminal-bench | 43.2% ↗ | not reported | — | — |
| Only Grok 4.5 reports · 4 | ||||
| LMArena Elo | not reported | 1450.1 ↗ | — | — |
| FrontierMath Tier 4 v2 (Epoch AI run) | not reported | 24.4% ↗epoch | — | — |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | not reported | 57.2% ↗epoch | — | — |
| SimpleQA Verified | not reported | 48.3% ↗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 minus Grok 4.5 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 | Grok 4.5 | Edge |
|---|---|---|---|
| Context window | 200K tokens | 500K tokens | Grok 4.5 |
| Max output | 32K tokens | — | — |
| Input price / 1M | $15 ↗ | $2 ↗ | Grok 4.5 |
| Output price / 1M | $75 ↗ | $6 ↗ | Grok 4.5 |
| Cached input / 1M | $1.5 ↗ | $0.3 ↗ | Grok 4.5 |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $90 | $8 | Grok 4.5 |
| Modalities | text · vision | text · vision | Tie |
| Released | 2025-05-22 | 2026-07-08 | — |
| Cited benchmark scores | 6 | 6 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
Claude Opus 4 vs …
Models sharing the most benchmarksMore matchups
Grok 4.5 vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run Claude Opus 4 and Grok 4.5 on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.