Opus 4.6 is Anthropic’s strongest model for coding and long-running professional tasks. It is built for agents that operate across entire workflows rather than single prompts, making it especially effective for large codebases, complex refa…
Model details →Anthropic: Claude Opus 4.6 vs Google: Gemini 3.1 Pro Preview Custom Tools
Google: Gemini 3.1 Pro Preview Custom Tools wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
Gemini 3.1 Pro Preview Custom Tools is a variant of Gemini 3.1 Pro that improves tool selection behavior by preventing overuse of a general bash tool when more efficient third-party or user-defined functions are available. This specialized …
Model details →Side-by-side comparison
| Capability | Anthropic: Claude Opus 4.6 | Google: Gemini 3.1 Pro Preview Custom Tools | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1M | 1.0M | 🏆 Google: Gemini 3.1 Pro Preview Custom Tools |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $5.00 | $2.00 | 🏆 Google: Gemini 3.1 Pro Preview Custom Tools |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $25.00 | $12.00 | 🏆 Google: Gemini 3.1 Pro Preview Custom Tools |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is Anthropic: Claude Opus 4.6 better than Google: Gemini 3.1 Pro Preview Custom Tools?
Google: Gemini 3.1 Pro Preview Custom Tools wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Anthropic: Claude Opus 4.6 and Google: Gemini 3.1 Pro Preview Custom Tools?
Input: $5.00 vs $2.00 per 1M tokens. Output: $25.00 vs $12.00 per 1M tokens.
What context windows do Anthropic: Claude Opus 4.6 and Google: Gemini 3.1 Pro Preview Custom Tools support?
Anthropic: Claude Opus 4.6 supports up to 1M tokens. Google: Gemini 3.1 Pro Preview Custom Tools supports up to 1.0M tokens.
Do both Anthropic: Claude Opus 4.6 and Google: Gemini 3.1 Pro Preview Custom Tools support tool calling?
Anthropic: Claude Opus 4.6: yes. Google: Gemini 3.1 Pro Preview Custom Tools: yes.