Claude Opus 4.5 vs Gemini 3 Flash: Specs & Benchmark Comparison
| Characteristic | Claude Opus 4.5 | Gemini 3 Flash |
|---|---|---|
| Company | Anthropic | |
| Release Date | November 23, 2025 | December 16, 2025 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 200K | 1.0M |
| Context (output) | 64K | 66K |
| Input Price / 1M | $5.00 | $0.50 |
| Output Price / 1M | $25.00 | $3.00 |
| Average Score | 0.9 | 0.9 |
| Benchmarks | ||
| GPQA | 0.9 | 0.9 |
| MMMLU | 0.9 | 0.9 |
Visual Benchmark Comparison
Claude Opus 4.5
Gemini 3 Flash
GPQA0.9 vs 0.9
0.9
0.9
MMMLU0.9 vs 0.9
0.9
0.9
Verdict
Gemini 3 Flash leads in 3 out of 4 comparison categories.
Overall Performance
Both models show comparable average scores: Claude Opus 4.5 — 0.9, Gemini 3 Flash — 0.9.
API Cost
Gemini 3 Flash is 8.6x cheaper: input $0.50/1M vs $5.00/1M tokens.
Context Window
Gemini 3 Flash supports a larger context: 1M vs 200K tokens.
Recency
Gemini 3 Flash is newer: released 12/16/2025 vs 11/23/2025.
More About These Models
Related Comparisons
Frequently Asked Questions
Which is better for coding — Claude Opus 4.5 or Gemini 3 Flash?
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 Gemini 3 Flash?
Gemini 3 Flash is cheaper for input: $0.50 per 1M tokens vs $5.00.
Which has a larger context window — Claude Opus 4.5 or Gemini 3 Flash?
Gemini 3 Flash supports a larger context: 1,048,576 tokens vs 200,000.
The Claude Opus 4.5 and Gemini 3 Flash 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 Gemini 3 Flash page. See also the complete list of AI model comparisons.