Claude Opus 4.5 vs Gemini 3 Pro
Benchmark, pricing and capability comparison of Claude Opus 4.5 and Gemini 3 Pro.
Anthropic
- Arena Elo
- 1440
- Context
- 200K
- GPQA
- 87%
- SWE-Bench
- 80%
- Input $/1M
- $5
- Output $/1M
- $25
- Arena Elo
- 1455
- Context
- 1,000K
- GPQA
- 86%
- SWE-Bench
- 76%
- Input $/1M
- $2
- Output $/1M
- $12
Verdict
Claude Opus 4.5 and Gemini 3 Pro are both high-performance proprietary language models with strong reasoning and coding capabilities. The key differences lie in context window and pricing: Gemini 3 Pro supports 1,000,000 tokens versus Claude's 200,000, making it better suited for processing extremely long documents. Gemini also has a slight edge in Arena Elo (1455 vs 1440) and is notably cheaper at $2/$12 per million tokens compared to Claude's $5/$25. Claude Opus 4.5 emphasizes safety and alignment, with a focus on minimizing harmful outputs. Choose Claude Opus 4.5 if safety, alignment, and reduced harmful outputs are priorities, or if you prefer Anthropic's approach to AI development. Choose Gemini 3 Pro if you need the largest possible context window for processing very long documents, want lower costs, or prefer Google's ecosystem.
Claude Opus 4.5 vs Gemini 3 Pro — FAQ
It depends on the use case. Gemini 3 Pro has a slight edge in Arena Elo (1455 vs 1440), a larger context window (1M vs 200K tokens), and lower pricing. Claude Opus 4.5 emphasizes safety and alignment, which may be preferable for applications requiring careful output control.