Claude Opus 4.5 vs Mercury 2: Specs & Benchmark Comparison
| Characteristic | Claude Opus 4.5 | Mercury 2 |
|---|---|---|
| Company | Anthropic | Inception |
| Release Date | November 23, 2025 | February 1, 2026 |
| Parameters | — | — |
| Multimodal | Yes | No |
| Context (input) | 200K | — |
| Context (output) | 64K | — |
| Input Price / 1M | $5.00 | — |
| Output Price / 1M | $25.00 | — |
| Average Score | 0.9 | 0.7 |
| Benchmarks | ||
| GPQA | 0.9 | 0.7 |
Visual Benchmark Comparison
Claude Opus 4.5
Mercury 2
GPQA0.9 vs 0.7
0.9
0.7
Verdict
Mercury 2 leads in 1 out of 2 comparison categories.
Overall Performance
Both models show comparable average scores: Claude Opus 4.5 — 0.9, Mercury 2 — 0.7.
Recency
Mercury 2 is newer: released 2/1/2026 vs 11/23/2025.
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The Claude Opus 4.5 and Mercury 2 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 Mercury 2 page. See also the complete list of AI model comparisons.