Claude Opus 4.5 vs Grok-3: Specs & Benchmark Comparison
| Characteristic | Claude Opus 4.5 | Grok-3 |
|---|---|---|
| Company | Anthropic | xAI |
| Release Date | November 23, 2025 | February 16, 2025 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 200K | 128K |
| Context (output) | 64K | 8K |
| Input Price / 1M | $5.00 | $3.00 |
| Output Price / 1M | $25.00 | $15.00 |
| Average Score | 0.9 | 0.8 |
| Benchmarks | ||
| GPQA | 0.9 | 0.8 |
Visual Benchmark Comparison
Claude Opus 4.5
Grok-3
GPQA0.9 vs 0.8
0.9
0.8
Verdict
Claude Opus 4.5 leads in 2 out of 4 comparison categories.
Overall Performance
Both models show comparable average scores: Claude Opus 4.5 — 0.9, Grok-3 — 0.8.
API Cost
Grok-3 is 1.7x cheaper: input $3.00/1M vs $5.00/1M tokens.
Context Window
Claude Opus 4.5 supports a larger context: 200K vs 128K tokens.
Recency
Claude Opus 4.5 is newer: released 11/23/2025 vs 2/16/2025.
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Frequently Asked Questions
Which is better for coding — Claude Opus 4.5 or Grok-3?
Direct comparison on the SWE-Bench benchmark is not available. We recommend reviewing other metrics on the comparison page.
Which model is cheaper — Claude Opus 4.5 or Grok-3?
Grok-3 is cheaper for input: $3.00 per 1M tokens vs $5.00.
Which has a larger context window — Claude Opus 4.5 or Grok-3?
Claude Opus 4.5 supports a larger context: 200,000 tokens vs 128,000.
The Claude Opus 4.5 and Grok-3 comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Claude Opus 4.5 or Grok-3 page. See also the complete list of AI model comparisons.