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Claude Sonnet 4.6 vs Gemini 3.1 Pro
A detailed comparison of Claude Sonnet 4.6 (Anthropic) and Gemini 3.1 Pro (Google) across pricing, performance, and features.
Pricing Comparison
| Metric | Claude Sonnet 4.6 | Gemini 3.1 Pro | Difference |
|---|---|---|---|
| Input / 1M tokens | $3.00 | $2.00 | -33% |
| Output / 1M tokens | $15.00 | $12.00 | -20% |
| Context window | 200K | 1M | — |
| Max output | 16K | 64K | — |
Benchmark Comparison
| Benchmark | Claude Sonnet 4.6 | Gemini 3.1 Pro |
|---|---|---|
| MMLU-Pro | 86% | 91% |
| HumanEval | 94% | 95% |
| GPQA | 70% | 94.3% |
Capabilities
| Capability | Claude Sonnet 4.6 | Gemini 3.1 Pro |
|---|---|---|
| audio | ✗ | ✓ |
| code | ✓ | ✓ |
| reasoning | ✓ | ✓ |
| text | ✓ | ✓ |
| tool-use | ✓ | ✓ |
| vision | ✓ | ✓ |
Claude Sonnet 4.6 Strengths
- ✓Opus 4.5 quality at 1/5th the cost
- ✓Best value for production workloads
- ✓1M context in beta
Claude Sonnet 4.6 Weaknesses
- ✗Long context pricing doubles above 200K
- ✗Slightly below Opus 4.6 on hardest tasks
Gemini 3.1 Pro Strengths
- ✓#1 on 12 of 18 tracked benchmarks
- ✓94.3% GPQA Diamond — highest of any model
- ✓Same price as Gemini 3 Pro (free upgrade)
- ✓1M context with configurable thinking levels
Gemini 3.1 Pro Weaknesses
- ✗Still in preview
- ✗Context-tiered pricing ($4/$18 above 200K)
Quick Verdict
Best value: Gemini 3.1 Pro is the more affordable option at $2/$12 per 1M tokens.
Higher benchmarks: Gemini 3.1 Pro scores higher on average across available benchmarks (93.4% avg).
Larger context: Gemini 3.1 Pro supports 1M tokens.
Choose Gemini 3.1 Pro if cost matters most. Choose Claude Sonnet 4.6 if you need the best possible quality for complex tasks.