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Claude Sonnet 4.5 vs Gemini 2.5 Pro
A detailed comparison of Claude Sonnet 4.5 (Anthropic) and Gemini 2.5 Pro (Google) across pricing, performance, and features.
Pricing Comparison
| Metric | Claude Sonnet 4.5 | Gemini 2.5 Pro | Difference |
|---|---|---|---|
| Input / 1M tokens | $3.00 | $1.25 | -58% |
| Output / 1M tokens | $15.00 | $10.00 | -33% |
| Context window | 200K | 1M | — |
| Max output | 16K | 65.536K | — |
Benchmark Comparison
| Benchmark | Claude Sonnet 4.5 | Gemini 2.5 Pro |
|---|---|---|
| MMLU-Pro | 84.5% | 87.5% |
| HumanEval | 93% | 93.5% |
| GPQA | 68.2% | 76% |
Capabilities
| Capability | Claude Sonnet 4.5 | Gemini 2.5 Pro |
|---|---|---|
| audio | ✗ | ✓ |
| code | ✓ | ✓ |
| reasoning | ✓ | ✓ |
| text | ✓ | ✓ |
| tool-use | ✓ | ✓ |
| vision | ✓ | ✓ |
Claude Sonnet 4.5 Strengths
- ✓Well-tested and stable
- ✓Strong coding and analysis
Claude Sonnet 4.5 Weaknesses
- ✗Superseded by Sonnet 4.6
- ✗Same price as the newer model
Gemini 2.5 Pro Strengths
- ✓Competitive pricing for its capabilities
- ✓1M context window
- ✓Well-tested and stable
Gemini 2.5 Pro Weaknesses
- ✗Being superseded by Gemini 3 Pro
Quick Verdict
Best value: Gemini 2.5 Pro is the more affordable option at $1.25/$10 per 1M tokens.
Higher benchmarks: Gemini 2.5 Pro scores higher on average across available benchmarks (85.7% avg).
Larger context: Gemini 2.5 Pro supports 1M tokens.
Choose Gemini 2.5 Pro if cost matters most. Choose Claude Sonnet 4.5 if you need the best possible quality for complex tasks.