Fusion turns your prompt into a small multi-model deliberation. A panel of expert models (see below) analyzes your prompt in parallel with web search and web fetch enabled, then a...
Model details →OpenRouter: Fusion vs Anthropic: Claude Opus Latest
Anthropic: Claude Opus Latest wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
This model always redirects to the latest model in the Claude Opus family.
Model details →Side-by-side comparison
| Capability | OpenRouter: Fusion | Anthropic: Claude Opus Latest | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1M | 1M | Tie |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $-1000000.00 | $5.00 | 🏆 OpenRouter: Fusion |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $-1000000.00 | $25.00 | 🏆 OpenRouter: Fusion |
| Tool / function calling First-class support for emitting structured tool calls. | — | Yes | 🏆 Anthropic: Claude Opus Latest |
| Vision input Accepts image inputs alongside text. | — | Yes | 🏆 Anthropic: Claude Opus Latest |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | — | Yes | 🏆 Anthropic: Claude Opus Latest |
Frequently asked questions
Is OpenRouter: Fusion better than Anthropic: Claude Opus Latest?
Anthropic: Claude Opus Latest wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between OpenRouter: Fusion and Anthropic: Claude Opus Latest?
Input: $-1000000.00 vs $5.00 per 1M tokens. Output: $-1000000.00 vs $25.00 per 1M tokens.
What context windows do OpenRouter: Fusion and Anthropic: Claude Opus Latest support?
OpenRouter: Fusion supports up to 1M tokens. Anthropic: Claude Opus Latest supports up to 1M tokens.
Do both OpenRouter: Fusion and Anthropic: Claude Opus Latest support tool calling?
OpenRouter: Fusion: not advertised. Anthropic: Claude Opus Latest: yes.
Compare OpenRouter: Fusion with other models
vs Anthropic Claude Haiku Latestvs Anthropic Claude Sonnet Latestvs Anthropic: Claude Fable Latestvs Anthropic: Claude Opus Latest