| Signal | Claude Sonnet 4.5 | Delta | Gemini 3.1 Pro Preview Custom Tools |
|---|---|---|---|
Capabilities | 100 | -- | |
Benchmarks | 82 | +3 | |
Pricing | 85 | -3 | |
Context window size | 95 | 0 | |
Recency | 92 | -8 | |
Output Capacity | 80 | 0 | |
| Overall Result | 1 wins | of 6 | 4 wins |
Score History
82.4
current score
Claude Sonnet 4.5
right now
81.1
current score
Anthropic
Gemini 3.1 Pro Preview Custom Tools saves you $250.00/month
That's $3000.00/year compared to Claude Sonnet 4.5 at your current usage level of 100K calls/month.
| Metric | Claude Sonnet 4.5 | Gemini 3.1 Pro Preview Custom Tools | Winner |
|---|---|---|---|
| Overall Score | 82 | 81 | Claude Sonnet 4.5 |
| Rank | #30 | #34 | Claude Sonnet 4.5 |
| Quality Rank | #30 | #34 | Claude Sonnet 4.5 |
| Adoption Rank | #30 | #34 | Claude Sonnet 4.5 |
| Parameters | -- | -- | -- |
| Context Window | 1000K | 1049K | Gemini 3.1 Pro Preview Custom Tools |
| Pricing | $3.00/$15.00/M | $2.00/$12.00/M | -- |
| Signal Scores | |||
| Capabilities | 100 | 100 | Claude Sonnet 4.5 |
| Benchmarks | 82 | 79 | Claude Sonnet 4.5 |
| Pricing | 85 | 88 | Gemini 3.1 Pro Preview Custom Tools |
| Context window size | 95 | 96 | Gemini 3.1 Pro Preview Custom Tools |
| Recency | 92 | 100 | Gemini 3.1 Pro Preview Custom Tools |
| Output Capacity | 80 | 80 | Gemini 3.1 Pro Preview Custom Tools |
Our score (0-100) is driven by benchmark performance (90%) from Arena Elo ratings, MMLU, GPQA, HumanEval, SWE-bench, and 15+ standardized evaluations. Capabilities and context window serve as tiebreakers (10%). Learn more about our methodology.
Scores 82/100 (rank #30), placing it in the top 90% of all 290 models tracked.
Scores 81/100 (rank #34), placing it in the top 89% of all 290 models tracked.
With only a 1-point gap, these models are in the same performance tier. The practical difference in output quality is minimal - your choice should depend on pricing, latency requirements, and specific feature needs.
Gemini 3.1 Pro Preview Custom Tools offers 22% better value per quality point. At 1M tokens/day, you'd spend $210.00/month with Gemini 3.1 Pro Preview Custom Tools vs $270.00/month with Claude Sonnet 4.5 - a $60.00 monthly difference.
Both models have comparable response speeds. For most applications, the latency difference is negligible.
When latency matters most: Interactive chatbots, IDE code completion, real-time translation, and user-facing applications where response time directly impacts experience. For batch processing, background summarization, or offline analysis, latency is less critical.
Code generation & review
Based on overall model capabilities and architecture for coding tasks like generating functions, debugging, and refactoring
Customer support chatbot
Suitable for user-facing chat with competitive response times. Gemini 3.1 Pro Preview Custom Tools also offers lower per-token costs for high-volume support
Long document analysis
Larger context window (1049K tokens) can process longer documents, contracts, and research papers in a single pass
Batch data extraction
Lower output pricing ($12.00/M) reduces costs when processing thousands of records daily
Creative writing & content
Higher overall composite score (82/100) correlates with better nuance, coherence, and style in long-form content
Image understanding & OCR
Supports vision input - can analyze screenshots, diagrams, photos, and scanned documents directly
Claude Sonnet 4.5 and Gemini 3.1 Pro Preview Custom Tools are extremely close in overall performance (only 1.3000000000000114 points apart). Your best choice depends entirely on which specific strengths matter most for your use case.
Best for Quality
Claude Sonnet 4.5
Marginally better benchmark scores; both are excellent
Best for Cost
Gemini 3.1 Pro Preview Custom Tools
22% lower pricing; better value at scale
Best for Reliability
Claude Sonnet 4.5
Higher uptime and faster response speeds
Best for Prototyping
Claude Sonnet 4.5
Stronger community support and better developer experience
Best for Production
Claude Sonnet 4.5
Wider enterprise adoption and proven at scale
by Anthropic
by Google
| Capability | Claude Sonnet 4.5 | Gemini 3.1 Pro Preview Custom Tools |
|---|---|---|
| Vision (Image Input) | ||
| Function Calling | ||
| Streaming | ||
| JSON Mode | ||
| Reasoning | ||
| Web Search | ||
| Image Output |
Anthropic
Gemini 3.1 Pro Preview Custom Tools saves you $5.40/month
That's 23% cheaper than Claude Sonnet 4.5 at 1,000 tokens/request and 100 requests/day.
Assumes 60% input / 40% output token ratio per request. Actual costs may vary based on your usage pattern.
| Parameter | Claude Sonnet 4.5 | Gemini 3.1 Pro Preview Custom Tools |
|---|---|---|
| Context Window | 1M | 1.0M |
| Max Output Tokens | 64,000 | 65,536 |
| Open Source | No | No |
| Created | Sep 29, 2025 | Feb 25, 2026 |