Claude Opus 5 vs Grok 4.5: Specs & Benchmark Comparison
| Characteristic | Claude Opus 5 | Grok 4.5 |
|---|---|---|
| Company | Anthropic | xAI |
| Release Date | July 24, 2026 | July 16, 2026 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | 500K |
| Context (output) | 128K | — |
| Input Price / 1M | $5.00 | $2.00 |
| Output Price / 1M | $25.00 | $6.00 |
| Average Score | 0.6 | 0.8 |
Verdict
Both models show equal results — the choice depends on your specific use case.
Overall Performance
Both models show comparable average scores: Claude Opus 5 — 0.6, Grok 4.5 — 0.8.
API Cost
Grok 4.5 is 3.8x cheaper: input $2.00/1M vs $5.00/1M tokens.
Context Window
Claude Opus 5 supports a larger context: 1M vs 500K tokens.
Recency
Both models were released around the same time: 7/24/2026 and 7/16/2026.
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Frequently Asked Questions
Which is better for coding — Claude Opus 5 or Grok 4.5?
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 5 or Grok 4.5?
Grok 4.5 is cheaper for input: $2.00 per 1M tokens vs $5.00.
Which has a larger context window — Claude Opus 5 or Grok 4.5?
Claude Opus 5 supports a larger context: 1,000,000 tokens vs 500,000.
The Claude Opus 5 and Grok 4.5 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 5 or Grok 4.5 page. See also the complete list of AI model comparisons.