Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...
Model details →Anthropic: Claude Opus 5.5 (batch) vs Google: Gemini 3.1 Pro Preview
Anthropic: Claude Opus 5.5 (batch) and Google: Gemini 3.1 Pro Preview are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
Gemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows. Building on the multimodal foundation.…
Model details →Side-by-side comparison
| Capability | Anthropic: Claude Opus 5.5 (batch) | Google: Gemini 3.1 Pro Preview | 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 |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $2.00 | $2.00 | Tie |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $10.00 | $12.00 | 🏆 Anthropic: Claude Opus 5.5 (batch) |
| 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 5.5 (batch) better than Google: Gemini 3.1 Pro Preview?
Anthropic: Claude Opus 5.5 (batch) and Google: Gemini 3.1 Pro Preview are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
What's the price difference between Anthropic: Claude Opus 5.5 (batch) and Google: Gemini 3.1 Pro Preview?
Input: $2.00 vs $2.00 per 1M tokens. Output: $10.00 vs $12.00 per 1M tokens.
What context windows do Anthropic: Claude Opus 5.5 (batch) and Google: Gemini 3.1 Pro Preview support?
Anthropic: Claude Opus 5.5 (batch) supports up to 1M tokens. Google: Gemini 3.1 Pro Preview supports up to 1.0M tokens.
Do both Anthropic: Claude Opus 5.5 (batch) and Google: Gemini 3.1 Pro Preview support tool calling?
Anthropic: Claude Opus 5.5 (batch): yes. Google: Gemini 3.1 Pro Preview: yes.