Gemini 3.1 Pro vs Claude Sonnet 5
Detailed pricing comparison and cost analysis.
Updated September 2026
Cost Simulator
| Feature | Gemini 3.1 Pro | Claude Sonnet 5 |
|---|---|---|
| Provider | Anthropic | |
| Input Price (1M) | $2.00 | $2.00 |
| Output Price (1M) | $12.00 | $10.00 |
| Context Window | 1,000,000 | 1,000,000 |
Verdict
Gemini 3.1 Pro costs $2.00 per 1M input tokens and $12.00 per 1M output tokens. Claude Sonnet 5 costs $2.00 per 1M input tokens and $10.00 per 1M output tokens. Gemini 3.1 Pro and Claude Sonnet 5 have identical input token pricing. For output tokens, Claude Sonnet 5 is the more affordable option at $10.00/1M vs $12.00.
On context window, Gemini 3.1 Pro supports 1,000,000 tokens — meaning it can fit more conversation history, documents, or code in a single request. This matters for RAG pipelines, long document analysis, and agentic workflows where context builds up over many turns.
When to choose Gemini 3.1 Pro
- ✓ You are already integrated with Google
When to choose Claude Sonnet 5
- ✓ Your workload is output-heavy — Claude Sonnet 5 generates text cheaper
- ✓ You are already integrated with Anthropic
Use the calculator above to simulate your specific workload and find the exact break-even point. For most applications, the cheapest model is the one that minimises your total monthly bill given your input-to-output token ratio.
Frequently Asked Questions
Is Gemini 3.1 Pro cheaper than Claude Sonnet 5? ▼
Gemini 3.1 Pro and Claude Sonnet 5 have identical input token pricing at $2.00/1M tokens.
What is the context window of Gemini 3.1 Pro vs Claude Sonnet 5? ▼
Gemini 3.1 Pro has a 1,000,000-token context window. Claude Sonnet 5 has a 1,000,000-token context window. Gemini 3.1 Pro supports the larger context, suitable for longer documents and agentic workflows.
Which model is better: Gemini 3.1 Pro or Claude Sonnet 5? ▼
The best choice depends on your use case. For cost efficiency on input tokens, Gemini 3.1 Pro is the cheaper option. For maximum context length, Gemini 3.1 Pro supports 1,000,000 tokens. Use the comparison table above to find the right fit for your workload.