Claude Opus 4.5 vs Gemini 3.1 Pro: Specs & Benchmark Comparison
| Characteristic | Claude Opus 4.5 | Gemini 3.1 Pro |
|---|---|---|
| Company | Anthropic | |
| Release Date | November 23, 2025 | February 19, 2026 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 200K | 1.0M |
| Context (output) | 64K | 66K |
| Input Price / 1M | $5.00 | $2.50 |
| Output Price / 1M | $25.00 | $15.00 |
| Average Score | 0.9 | 0.8 |
| Benchmarks | ||
| GPQA | 0.9 | 0.9 |
| MMMLU | 0.9 | 0.9 |
| SWE-Bench Verified | 0.8 | 0.8 |
Visual Benchmark Comparison
Claude Opus 4.5
Gemini 3.1 Pro
GPQA0.9 vs 0.9
0.9
0.9
MMMLU0.9 vs 0.9
0.9
0.9
SWE-Bench Verified0.8 vs 0.8
0.8
0.8
Verdict
Gemini 3.1 Pro leads in 3 out of 5 comparison categories.
Overall Performance
Both models show comparable average scores: Claude Opus 4.5 — 0.9, Gemini 3.1 Pro — 0.8.
Programming
On SWE-Bench, both models are nearly equal: Claude Opus 4.5 — 0.8, Gemini 3.1 Pro — 0.8.
API Cost
Gemini 3.1 Pro is 1.7x cheaper: input $2.50/1M vs $5.00/1M tokens.
Context Window
Gemini 3.1 Pro supports a larger context: 1M vs 200K tokens.
Recency
Gemini 3.1 Pro is newer: released 2/19/2026 vs 11/23/2025.
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Frequently Asked Questions
Which is better for coding — Claude Opus 4.5 or Gemini 3.1 Pro?
On the SWE-Bench benchmark, Claude Opus 4.5 shows a better result: 0.8 vs 0.8.
Which model is cheaper — Claude Opus 4.5 or Gemini 3.1 Pro?
Gemini 3.1 Pro is cheaper for input: $2.50 per 1M tokens vs $5.00.
Which has a larger context window — Claude Opus 4.5 or Gemini 3.1 Pro?
Gemini 3.1 Pro supports a larger context: 1,048,576 tokens vs 200,000.
The Claude Opus 4.5 and Gemini 3.1 Pro 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 3.1 Pro page. See also the complete list of AI model comparisons.